Springfield City Zoning Code
Appendix
A.1 Land Use Designations and Zoning-General.
A.1.a.
Designate and zone land that meets the fundamental characteristics of the Mixed Use and Nodal Development Area designations, as defined in the Metro Plan, and multi-modal mixed-use areas (MMA), as defined in OAR 660-012-0060.
A.1.a.1.
Maintain and expand the existing nodal designation boundary to include land on both sides of Franklin Boulevard from the I-5 Bridges to the Springfield Bridges, and on both sides of McVay Highway between the Springfield Bridges and an area just south of the railroad trestle, as depicted in Figure 2.
A.1.a.2.
Designate and zone land north of Franklin Boulevard in between the northern extension of Henderson Avenue and the northern extension of McVay Highway as Residential Mixed-Use, as depicted in Figure 2.
A.1.a.3.
Designate and zone land north of Franklin Boulevard in between the northern extension of McVay Highway and the Springfield Bridges as Commercial Mixed-Use, as well as Assessor's Maps and Tax Lots 18-03-03-11-01401, 17-03-34-44-03300, and 17-03-34-44-00301, as depicted in Figure 2.
A.1.a.4.
Designate and zone land on both sides of McVay Highway from the Springfield Bridges to the southern terminus of Springfield's Urban Growth Boundary as Employment Mixed-Use except for Assessor's Maps and Tax Lots 18-03-03-11-01401, 17-03-34-44-03300, and 17-03-34-44-00301, as depicted in Figure 2.
 Figure 2 |
A.1.a.5.
Designate and zone land on both sides of McVay Highway from the Springfield Bridges to the southern terminus of Springfield's Urban Growth Boundary as Employment Mixed-Use, as depicted in Figure 2.
A.1.a.6.
Designate all land within the Phase I Glenwood Refinement Plan boundary a Multimodal Mixed-Use Area (MMA), as depicted in Figure 2.
A.1.a.7.
Compliance with the Transportation Planning Rule (TPR). The TPR (OAR 660-012-0000, et seq.) requires that when making an amendment to a land use plan, a local jurisdiction shall put in place measures to ensure that land uses are consistent with the identified function, capacity, and performance standards of a State or City facility when the plan amendment has a significant effect on that facility. The TPR defines "significant effect" as reducing performance below the minimum acceptable standard in the relevant plan, or worsening the performance of a facility otherwise projected to perform below the minimum acceptable standard. However, a local government may amend a land use plan without applying the performance standards if the proposed amendment is entirely within a multimodal mixed-use area (MMA) (OAR 660-012-0060). (6316; 6279)
A.2 Land Use Designations and Zoning-Specific.
A.2.a.
Adopt the GRMU Plan District and apply it to all parcels in the Glenwood Riverfront.
A.2.a.1.
Develop Plan District subsections, including, but not limited to, Purpose; Applicability; Land Use Designations, Zoning District Descriptions and Applicable Overlay Districts; Review; Non-Conforming Uses; Conflicts; GRMU Plan District Modifications; Design Standards Alternatives/Exemptions from Design Standards; Phased Development; Schedule of Use Categories; Prohibited Uses; Use Interpretations; Base Zone Standards; Public and Private Development Standards; Building Design Standards; and Willamette Greenway Development Standards.
A.2.a.2.
Develop development and design subsections, including, but not limited to, Street Trees and Curbside Planter Strips, Lighting, Bicycle Facilities, Multiuse Path, Private Property Landscape Standards, Vehicle/Bicycle Parking and Loading Standards, Wastewater Facilities and Services, Stormwater Facilities and Services, Public Park and Open Space Facilities, Location of Transit Stations, Signs, Light Manufacturing Operational Performance Standards, Historic and Cultural Resources, Design Team, Facades/Vertical Building Divisions, Height, Massing/Building Articulation, Windows and Doors, Orientation/Entrances, Build-to Lines and Maximum Building Setbacks, Pedestrian Amenities, Screening Mechanical Equipment, and Parking Structure Design Standards. (6279)
B.1 Franklin Boulevard.
B.1.a.
Partner with ODOT, Lane Transit District (LTD), property owners, and private developers to fund, dedicate right-of-way, design, and construct the upgraded Franklin Boulevard.
B.1.a.1.
During the land use review and approval process for properties fronting Franklin Boulevard, establish design and right-of-way obligations, and require dedication of right-of-way necessary to construct the hybrid multi-way boulevard.
B.1.b.
Use a blend of hybrid multi-way boulevard designs as shown in Figure 1 Conceptual Project Design to allow for flexibility in phasing design and construction as funding becomes available.
 Figure 1 |
B.1.b.1.
Locate the right-of-way for the Franklin Boulevard improvements within the Corridor Envelope shown in Figure 2. The Corridor Envelope extends five feet to the north and five feet to the south of the Conceptual Project Design.
 Figure 2 |
B.1.b.2.
Design the upgraded Franklin Boulevard such that the maximum necessary width does not exceed: two eastbound and two westbound through lanes; dedicated bus rapid transit facilities between Glenwood Boulevard and McVay Highway; left turn lanes; a continuous and safe bicycle facility along both sides of the boulevard; access lanes in specified locations separated by a landscaped median adjacent to the through lanes; continuous, wide setback sidewalks buffered from traffic flow; on-street parking on the north and south access lanes; and potential alternative bicycle/pedestrian amenities or on-street parking on both the north and south side of the arterial sections.
B.1.c.
Establish a Corridor Envelope that extends five feet to the north and five feet to the south of the Conceptual Project Design to provide a measure of flexibility in project delivery of the Franklin Boulevard improvement project. Within this Corridor Envelope, the maximum width of the hybrid multi-way boulevard is approximately 175 feet, except where bump-outs may be required for transit stations or intersections.
B.1.d.
Enhance the safety, comfort, and convenience of pedestrians and bicyclists along and across the boulevard, as conceptually depicted in Figure 3.
 Figure 3 |
B.1.d.1.
Establish continuous, wide setback sidewalks on both sides of the boulevard that are buffered from traffic flow and that consider the adjacent land use context pertinent to development.
B.1.d.2.
Reduce crossing distances and provide pedestrian refuges by utilizing two-stage crossings, curb extensions, stop controls, or other appropriate traffic control devices at intersections.
B.1.d.3.
Provide enhanced pedestrian crossings to transit stations in the vicinity of intersections.
B.1.d.4.
Enhance the urban design of the area and differentiate the building/frontage zone, the travel/throughway zone, the furnishing zone, and the curb/edge zone of the sidewalks by incorporating distinct elements, patterns, and/or materials such as pavement treatments, street trees, landscaping, water quality facilities, street furniture, bicycle parking, street lights, and pedestrian scale lighting.
B.1.d.5.
Provide a continuous and safe bicycle facility along both sides of the boulevard from the Springfield Bridges to the eastern edge of the south bank bicycle and pedestrian viaduct.
B.1.e.
Increase the safety, mobility, and efficiency of bus rapid transit service, automobiles, and trucks.
B.1.e.1.
Separate through traffic from local traffic by using a combination of direct through lanes and low-speed access lanes with on-street parking.
B.1.e.2.
Preserve capacity that may be used for dedicated bus rapid transit facilities.
B.1.e.3.
Construct multi-lane roundabouts at the Franklin Boulevard/McVay Highway intersection, Franklin Boulevard/Mississippi Avenue intersection, Franklin Boulevard/Henderson Avenue intersection, and the Franklin Boulevard/Glenwood Boulevard intersection that incorporate bicycle and pedestrian treatments that calm traffic and support pedestrian and bicycle mobility and safety.
B.1.e.4.
Coordinate with appropriate State and local agencies (depending on the jurisdictional responsibilities in effect) to close, consolidate, realign, and relocate street intersections and curb cuts along the length of Franklin Boulevard to improve facility operations and reduce safety conflicts.
B.1.f.
Locate transit stations to provide optimal, safe pedestrian access between stations and adjacent areas planned for mixed-use development.
B.1.f.1.
Construct three curbside stations along Franklin Boulevard, preferably at the Franklin Boulevard/Glenwood Boulevard intersection, Franklin Boulevard/Mississippi Avenue intersection and the Franklin Boulevard/McVay Highway intersection.
B.1.g.
Seek opportunities, partnerships, and funding to incorporate public art features into the design and construction of street improvements and to establish distinctive, iconic gateway features that help create a sense of place and orient travelers along the corridor. (6330; 6279)
B.2 Franklin Riverfront Local Street Network.
B.2.a.
Partner with property owners and private developers to fund, dedicate right-of-way, design, and construct an interconnected local street system in the Franklin Riverfront that improves access, mobility, safety, and comfort for vehicles, pedestrians, and bicyclists, as conceptually depicted in Figure 4.
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B.2.a.1.
Coordinate with Lane County to facilitate the new street system through annexation and vacation of existing local access roads.
B.2.a.2.
Coordinate with Lane County to provide an orderly transition from rural to urban roads through annexation and jurisdictional transfer of existing Lane County roads.
B.2.a.3.
Promote optimum conditions for the use of passive and active solar strategies by aligning streets to optimize the penetration of natural light to buildings and public spaces.
B.2.a.4.
Promote short blocks and pedestrian-friendly larger block development sites by providing through-block streets or accessways every 250 to 350 feet.
B.2.a.5.
Extend Glenwood Boulevard, Henderson Avenue, Mississippi Avenue, and McVay Highway north of Franklin Boulevard to the riverfront street as primary north-south through streets.
B.2.a.6.
Establish additional north-south through streets, extending from Franklin Boulevard's access lanes to the riverfront street in between Henderson Avenue and McVay Highway, and to include the park blocks as conceptually depicted in Figure 5 and as specified in the Open Space Chapter.
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B.2.a.7.
Establish an east-west through street (between the northern edge of development and the riverfront) from the northern extension of Glenwood Boulevard to the northern extension of McVay Highway, to avoid dead-end north-south streets; offer continuous public access, emergency access, and maintenance access along the riverfront; clarify public entrances and exits along the riverfront; and increase the actual and perceived safety of the riverfront.
B.2.a.8.
Establish east-west service streets from the northern extension of Henderson Avenue to the northern extension of McVay Highway to improve access, connectivity, and parking, loading, and collection services in between proposed new north-south streets.
B.2.a.9.
Consider a maximum of one through alley per block face to provide service access to mixed-use inner block development sites.
B.2.a.10.
Update the Conceptual Local Street Map, the Springfield Engineering Design Standards and Procedures Manual, and the Springfield Standard Construction Specifications regarding the Franklin Riverfront Local Street Network improvements to enable implementation of the Plan transportation policies and implementation strategies.
B.2.b.
Design north-south through streets to support and provide direct access to the mixed-use development facing these streets; and increase safety, comfort, and attractiveness for bicyclists and pedestrians, as conceptually depicted in Figure 6.
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B.2.b.1.
Develop two-way local streets consistent with maximum speeds of 20 miles per hour.
B.2.b.2.
Consider developing the streets around the park blocks as one-way couplets consistent with maximum speeds of 20 miles per hour.
B.2.b.3.
Use traffic calming techniques, such as reduced lane widths, raised crosswalks and intersections, mini roundabouts, and pedestrian priority crossings.
B.2.b.4.
Provide for direct, continuous, and safe bicycle travel along both sides of these streets.
B.2.b.5.
Incorporate continuous, wide setback sidewalks that are buffered from traffic flow and that consider the adjacent land use context pertinent to development on both sides of these streets.
B.2.b.6.
Enhance the urban design of the area and differentiate the building/frontage zone, the travel/throughway zone, the furnishing zone, and the curb/edge zone of the sidewalks by incorporating distinct elements, patterns, and/or materials such as pavement treatments, street trees, landscaping, water quality facilities, street furniture, bicycle parking, public art, street lights, and pedestrian scale lighting.
B.2.b.7.
Provide short-term, on-street parking bays on both sides of the primary north-south streets.
B.2.b.8.
Consider providing short-term, on-street parking bays only on the developed side of the north-south park block streets.
B.2.b.9.
Limit access to inner block development from these streets unless access for loading, parking, and/or collection services is not possible from east-west service streets.
B.2.b.10.
Maintain the elevation and appearance of sidewalks where crossed by vehicular access points.
B.2.b.11.
Consider alternative designs for through-block accessways on larger block development sites that function as safe and direct access routes for pedestrians and bicyclists, and include trees, landscaping, and pedestrian-scale lighting.
B.2.c.
Design east-west service streets to provide vehicular access for parking, loading, and collection services to inner block mixed-use development sites; increase safety, comfort, and attractiveness for bicyclists and pedestrians; and provide direct access to and support for the mixed-use development facing these streets, as conceptually depicted in Figure 6. At least one of the service streets must be a through street.
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B.2.c.1.
Develop 2-way local streets with target speeds consistent with maximum speeds of 20 miles per hour.
B.2.c.2.
Design the street segments that cross through the park blocks to be as narrow as possible while still accommodating 2-way traffic, emergency vehicle access, and potential on-street parking.
B.2.c.3.
Use traffic calming techniques, such as reduced lane widths, raised crosswalks and intersections, mini roundabouts, and pedestrian priority crossings.
B.2.c.4.
Provide for direct, continuous, and safe bicycle travel along both sides of these streets.
B.2.c.5.
Incorporate continuous, setback sidewalks that are buffered from traffic flow and that consider the adjacent land use context pertinent to development on both sides of these streets.
B.2.c.6.
Enhance the urban design of the area and differentiate the building/frontage zone, the travel/throughway zone, the furnishing zone, and the curb/edge zone of the sidewalks by incorporating distinct elements, patterns, and/or materials such as pavement treatments, street trees, landscaping, water quality facilities, street furniture, bicycle parking, public art, street lights, and pedestrian-scale lighting.
B.2.c.7.
Provide short-term, on-street parking on both sides of these service streets.
B.2.c.8.
Keep the frequency of curb cuts, loading docks, garage entrances, and driveways to a practical minimum, ideally no more than one vehicular access point per block face.
B.2.c.9.
Maintain the elevation and appearance of sidewalks where crossed by vehicular access points.
B.2.c.10.
Consider alternative designs for these streets (including street trees, landscaping, and pedestrian-scale lighting) while maintaining functionality as safe and direct access routes for pedestrians, bicyclists, and vehicles.
B.2.d.
Design an east-west riverfront through street to support and provide direct access to the mixed-use development facing this street, and to increase safety, comfort, and attractiveness for bicyclists and pedestrians, as conceptually depicted in Figures 7, 8, and 9.
 Figure 7 |
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B.2.d.1.
Develop a 2-way local street with target speeds consistent with maximum speeds of 20 miles per hour.
B.2.d.2.
Use traffic calming techniques, such as reduced lane widths, raised crosswalks and intersections, mini roundabouts, and pedestrian priority crossings.
B.2.d.3.
Provide for direct, continuous, and safe bicycle travel along both sides of these streets.
B.2.d.4.
Incorporate a continuous, wide, curbless setback sidewalk that is buffered from traffic flow and that considers the adjacent land use context pertinent to development on the south side of this street; and a continuous, wide, curbless setback sidewalk that is buffered from traffic flow and considers the adjacent open space context on the north side of this street.
B.2.d.5.
Design this street using distinctive pavement treatments within the vehicular lanes of the street and using retractable bollards, pavement treatments, or other features to separate curb-less sidewalks from vehicular lanes.
B.2.d.6.
Enhance the urban design of the area and differentiate the building/frontage zone, the travel/throughway zone, the furnishing zone, and the curb/edge zone of the sidewalks by incorporating distinct elements, patterns, and/or materials such as pavement treatments, street trees, landscaping, water quality facilities, street furniture, bicycle parking, public art, street lights, and pedestrian-scale lighting.
B.2.d.7.
Provide short-term, on-street parking bays on only the south side of this street, and preclude on-street parking on the north side of this street.
B.2.d.8.
Limit access to inner block development from this street unless access for parking services is not possible from the east-west service streets; truck access for loading and/or collection services is not permitted off this street.
B.2.d.9.
Maintain the elevation and appearance of sidewalks where crossed by vehicular access points.
B.2.d.10.
Allow for a shift in the Riverfront Street right-of-way without obtaining Major Modification approval under the Glenwood Riverfront Mixed-Use Plan District to permit a pre-existing non-conforming commercial building to remain on the north side of this street, if the building can be brought into compliance with the land use designation, zoning, and all applicable Glenwood Riverfront Mixed-Use Plan District development standards. The shift in the location of the right-of-way must be as close as possible to the building. (6279)
B.3 McVay Highway.
B.3.a.
Partner with ODOT, LTD, property owners, and private developers to fund, dedicate right-of-way, design, and construct the upgraded street.
B.3.b.
Construct street improvements to increase the safety, mobility, and efficiency of automobiles, trucks, and bus rapid transit service as funding becomes available.
B.3.b.1.
Design the upgraded street such that the maximum necessary width does not exceed 2 northbound and 2 southbound through lanes; dedicated bus rapid transit or other transit facilities or landscaped median; a continuous and safe bicycle facility along both sides of the street; and continuous setback sidewalks buffered from traffic flow.
B.3.b.2.
Finalize the number of through travel lanes for automobiles and trucks based on future employment mixed-use development and through-traffic volumes.
B.3.b.3.
Develop intersections with traffic controls in the vicinity of East 19th Avenue, Nugget Way, and the southern end of Glenwood, as conceptually depicted in Figure 10.
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B.3.b.4.
Coordinate with the Union Pacific Railroad to develop a plan for widening the right-of-way and improved roadway width underneath the railroad trestle at the north end of this street.
B.3.b.5.
Partner with LTD regarding planned bi-directional bus rapid transit service or other future transit requirements in the corridor, and coordinate planning of street improvements to address future transit system requirements.
B.3.b.6.
Coordinate with appropriate State and local agencies (depending on the jurisdictional responsibilities in effect) to close, consolidate, realign, and relocate street intersections and curb cuts to improve facility operations and reduce safety conflicts.
B.3.c.
Locate transit stations where they will provide optimal, safe pedestrian access to existing uses and the adjacent areas planned for employment mixed-use development.
B.3.c.1.
Establish median or curbside transit stations between the Franklin Boulevard intersection and the southern end of Glenwood, in the vicinity of East 19th Avenue and Nugget Way.
B.3.d.
Integrate street improvements that enhance the safety, comfort, and convenience of pedestrians and bicyclists along and across the street.
B.3.d.1.
Incorporate continuous, setback sidewalks that are buffered from traffic flow and that consider the adjacent land use context pertinent to development on both sides of the street.
B.3.d.2.
Use curb extensions, stop controls, or other appropriate traffic control devices at intersections to reduce crossing distances and provide pedestrian refuges.
B.3.d.3.
Provide enhanced pedestrian crossings to transit stations.
B.3.d.4.
Provide a continuous and safe bicycle facility along both sides of this street.
B.3.e.
Enhance the urban design of the area through the use of street trees, streetlights, pedestrian-scale lighting, and landscaping.
B.3.f.
Seek opportunities, partnerships, and funding to incorporate public art features into the design and construction of street improvements, and to establish distinctive, iconic gateway features that help create a sense of place and orient travelers along the corridor. (6279)
B.4 McVay Riverfront Local Street Network.
B.4.a.
Collaborate with property owners and private developers to fund, dedicate right-of-way, design, and construct a street system in the McVay Riverfront that enables access, mobility, safety, and comfort for vehicles, pedestrians, and bicyclists.
B.4.a.1.
Coordinate with Lane County to provide an orderly transition from rural to urban roads through annexation and jurisdictional transfer of existing Lane County roads.
B.4.a.2.
Promote optimum conditions for the use of passive and active solar strategies by aligning the street network to optimize the penetration of natural light to buildings and public spaces.
B.4.a.3.
Promote short blocks or pedestrian-friendly larger block development sites by providing through-block streets, accessways, or shared driveways every 250 to 350 feet.
B.4.a.4.
Create primary east-west streets extending eastward from intersections in the vicinity of the existing or re-aligned East 19th Avenue, Nugget Way, and the southern end of Glenwood.
B.4.a.5.
Establish access to individual development sites via connections to the primary east-west streets or connections to shared driveways with special design considerations for minimizing out-of-direction travel, traffic congestion, and conflicting turning movements.
B.4.a.6.
Evaluate and address street connectivity for existing discontinuous public streets and/or rights-of-way as development occurs in the vicinity of such streets.
B.4.b.
Design streets, accessways, and shared driveways to support the employment mixed-use development, and to make bicycling and walking safe, comfortable, and attractive.
B.4.b.1.
Develop 2-way local streets with target speeds consistent with maximum speeds of 20 miles per hour.
B.4.b.2.
Use traffic calming techniques, such as reduced lane widths, raised crosswalks and intersections, mini roundabouts, and pedestrian priority crossings.
B.4.b.3.
Provide for direct, continuous, and safe bicycle travel along both sides of these streets.
B.4.b.4.
Incorporate continuous, setback sidewalks that are buffered from traffic flow and that consider the adjacent land use context pertinent to development on both sides of these streets.
B.4.b.5.
Enhance the urban design of the area and differentiate the building/frontage zone, the travel/throughway zone, the furnishing zone, and the curb/edge zone of the sidewalks by incorporating distinct elements, patterns, and/or materials such as pavement treatments, street trees, landscaping, water quality facilities, street furniture, bicycle parking, public art, street lights, and pedestrian-scale lighting.
B.4.b.6.
Provide short-term, on-street parking on both sides of these streets.
B.4.b.7.
Keep the frequency of curb cuts, loading docks, garage entrances, and driveways to a practical minimum, ideally no more than one vehicular access point per block face.
B.4.b.8.
Maintain the elevation and appearance of sidewalks where crossed by vehicular access points.
B.4.b.9.
Consider alternative designs for through-block accessways on larger block development sites that function as safe and direct access routes for pedestrians and bicyclists, and that include trees, landscaping, and pedestrian-scale lighting. (6279)
B.5 Parking.
B.5.a.
Evaluate and develop parking standards for inclusion in the Glenwood Riverfront Mixed-Use Plan District that support Plan goals for transit, bicycling, walking, and ridesharing in conjunction with an access system that provides balanced travel mode options.
B.5.b.
As development or redevelopment occur, explore the feasibility and applicability of parking management program strategies including, but not limited to: parking and transportation coordination; signage; permitting; and enforcement.
B.5.b.1.
Explore adopting "Guiding Principles for Parking Management" as part of the Springfield Municipal Code.
B.5.b.2.
Explore establishing parking management zones with operating principles and an implementation framework based on usage and desired economic development.
B.5.b.3.
Explore reserving on street parking for high parking turnover land uses.
B.5.b.4.
Explore adopting the 85 Percent Rule* to facilitate/direct parking management strategies.
B.5.b.5.
Explore establishing a parking manager and advisory committee to oversee parking program implementation and review.
B.5.b.6.
Explore developing incentives for private development of publicly available parking, including, but not limited to, height/density bonuses, permit fee waivers, impact fee waivers, supply/revenue agreements, and property tax abatements.
B.5.b.7.
Explore monitoring parking utilization continuously and periodically, and conducting parking inventory analyses.
* | The 85 Percent Rule is a measure of parking utilization that acts as a benchmark against which parking management decisions are based. Within the parking industry, it is assumed that when an inventory of parking exceeds 85 percent occupancy in the peak hour, the supply becomes constrained and may not provide full and convenient access to its intended user. Once a supply of parking routinely exceeds 85 percent occupancy in the peak hour, the 85 Percent Rule would require that parking management strategies be evaluated and/or implemented to bring peak hour occupancies to a level below 85 percent to ensure intended uses are conveniently accommodated. (6279) |
B.6 Riverfront Multi-Use Path.
B.6.a.
Comply with Federal, State, and local water quality standards in locating and aligning the path, while taking advantage of vistas and site opportunities to meander and enhance the diversity of the path experience.
B.6.a.1.
Partner with property owners and private developers to dedicate the necessary public right-of-way or easements as annexations and/or development occurs.
B.6.a.2.
Consider planned future bicycle-pedestrian river crossings between Glenwood and Downtown, Glenwood and West D Street, and Glenwood and Dorris Ranch/Buford Park in aligning the path.
B.6.a.3.
Preserve existing trees and other riparian habitat features to the maximum extent practicable.
B.6.b.
Partner with Willamalane Park and Recreation District, property owners, and private developers to fund, design, and construct the path.
B.6.b.1.
Include a nighttime lighting strategy, to support evening activity and for safety and security on the path, that is sensitive to adjacent uses and functions, including natural areas, native habitat, and protection of the dark night sky.
B.6.b.2.
Use suitable techniques to reduce user conflicts, such as a striped or vegetated center lane or designing the path so that it is wide enough to permit bicyclists or skaters to pass pedestrians at a comfortable distance.
B.6.b.3.
Incorporate short-duration stop facilities, including, but not limited to, places to sit, historic and ecological interpretive kiosks, water quality features, water fountains, and public art, as supportive components of the path that provide space for groups of people to gather without restricting or conflicting with travel along the path.
B.6.c.
Provide frequent, convenient, and direct public bicycle and pedestrian access points to the path.
B.6.d.
Partner with Lane County to provide future path connections outside of the Springfield UGB towards Buford Park, the Lane Community College basin, and 30th Avenue. (6279)
C.1 Riparian Areas and Wetlands.
C.1.a.
Restore, enhance, and protect the riverbank and riparian and wetland areas.
C.1.a.1.
Work with property owners to establish Willamette River Greenway Setback Lines for water-dependent and water-related uses in the Glenwood Riverfront.
C.1.a.2.
Partner with property owners, private developers, non-profit organizations, and other agencies to seek opportunities and funding sources to acquire property and/or easements to create a contiguous riverfront that is sensitive to natural resource function and the urban interface.
C.1.a.3.
Restore, enhance, and protect the riverbank and riparian areas from the ordinary low water line to the Riparian Setback Line boundary using plants appropriate to the local urban aquatic and riparian areas and zones, as depicted in Figure 4.
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C.1.a.4.
Pursue funding for public/private partnerships to achieve riverbank re-shaping/benching, stabilization, and riparian and aquatic habitat restoration, as conceptually depicted in Figures 5a and 5b (also see Riverfront Linear park objective).
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C.1.a.5.
Establish policy for vegetation management of river bank, riparian, wetland, and other natural resource areas through sustainable landscaping and controlling invasive species based upon introducing and supporting plants appropriate to the local urban aquatic and riparian areas and zones.
C.1.a.6.
Incorporate into the Glenwood Mixed-Use Riverfront Plan District and the Springfield Engineering Design Standards And Procedures Manual, as appropriate, riverfront/river bank design concepts for developing an urban river's edge along the Glenwood Riverfront that improves conditions for fish, wildlife, plants and people.
C.1.b.
Integrate natural resources, urban interface/built environment, and water resources management.
C.1.b.1.
Establish and maintain riparian habitat connectivity to the maximum extent practicable, while allowing for and managing appropriate and limited public access to the river, as well as sight lines through the riparian area, as depicted in Figure 6.
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C.1.b.2.
Limit recreation and associated improvements within the Riparian Setback to passive activities including, but not limited to: picnicking; pedestrian activities; bicycling; bird watching; fishing; educational, interpretive, and directional signage; and riverfront viewing.
C.1.b.3.
Locate a multi-use path at the outermost edge of the Riparian Setback to the maximum extent practicable.
C.1.b.4.
Allow for Low Impact Development approaches for Stormwater Quality Management facilities and/or wetland educational parks that establish or restore natural stormwater functions to be within the riparian boundary and setback, as depicted in Figures 7 and 8.
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C.1.b.5.
Utilize the objectives, policy and implementation strategies listed in the Riverfront Linear park section of this document. (6316; 6279)
C.2 Floodplains.
C.2.a.
Restore, enhance, and protect the riverbank and riparian and wetland areas from encroachment and impact to their riverine flood control functionality during development or redevelopment.
C.2.a.1.
Initiate the update of FEMA Floodplain Maps between the Union Pacific Railroad trestle and the I-5 Bridges. (6279)
C.3 Hillsides.
C.3.a.
Protect hillsides, as defined in the Springfield Development Code, from degradation during development.
C.3.a.1.
Balance hillside development with conserving and promoting public health, safety, convenience, and general welfare by mimicking the pre-development hydrologic regime and managing soil stability incurred in the adjustment of the topography to meet development needs.
C.3.a.2.
Use the best accepted design, architecture, landscape architecture, and civil engineering principles to preserve, enhance, and promote the existing and future appearance and resources of hillside areas.
C.3.a.3.
Collaborate with property owners and private developers to preserve the viewshed and natural value of hillsides by soliciting voluntary land donation or acquisition through land trusts and other non-profit environmental organizations, or utilizing conservation easements to restrict development on portions of particular hillside areas. (6279)
C.4 Neighborhood Urban Park Blocks.
C.4.a.
Collaborate with Willamalane, property owners, and private developers to locate park blocks extending north from Franklin Boulevard's access lanes to the riverfront street between the northern extension of Henderson Avenue and McVay Highway, as conceptually depicted in Figure 10.
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C.4.a.1.
Size the park blocks to compatibly meet recreation, pedestrian connectivity, and stormwater management needs, with a minimum 150 foot width from face of curb to face of curb.
C.4.a.2.
Consider park user safety when designing stormwater management facilities in the park blocks.
C.4.a.3.
Balance the space and configuration needed for functional, attractive, and educational stormwater management facilities with the space and configuration needed for functional, attractive, and educational active and passive park space.
C.4.b.
Partner with Willamalane to ensure that the park blocks are designed to be safe, attractive, comfortable, and accessible for a wide range of potential users; to meet a variety of active and passive recreational needs throughout the year; and to be adaptable to changing needs and uses of surrounding buildings, as conceptually depicted in Figures 11, 12, and 13.
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 |
 |
C.4.b.1.
Provide appropriate pedestrian circulation to, through, and around these public open spaces, including, but not limited to, walkways; pathways; and sidewalks buffered from vehicular traffic.
C.4.b.2.
Create unique identities for public open space areas by featuring distinctive design elements in seating, lighting, paving, interpretive kiosks, and public art.
C.4.b.3.
Utilize a combination of maintenance friendly hard-surfaced areas, landscaping, and vegetation that is adapted for survival and growth in the Eugene-Springfield area and/or where required as listed in the Springfield Engineering Design Standards and Procedures Manual.
C.4.b.4.
Provide areas to congregate and socialize formally and informally by utilizing amenities, including, but not limited to, park furniture, picnic tables, benches, seating areas, restroom and maintenance facilities, and opportunities to accommodate outdoor entertainment, public gatherings, and exhibition/display areas.
C.4.b.5.
Consider accommodating additional outdoor seating areas for café patrons along the park blocks street frontage and/or food kiosks or pushcarts within the park blocks.
C.4.b.6.
Provide active recreational opportunities for exercise or informal, unstructured, non-organized recreation activities, including, but not limited to, informal play areas for outdoor games, and pet and children's play areas.
C.4.b.7.
Provide passive recreational opportunities for picnicking, strolling and viewing, sitting, reading, and passive games.
C.4.b.8.
Consider establishing community garden space. (6279)
C.5 Riverfront Linear park.
C.5.a.
Collaborate with Willamalane and others as appropriate to develop river edge variety along the linear park corridor, as conceptually depicted in Figures 10 and 14; protect lands within the coterminous Riparian and Willamette Greenway Setback area; integrate a variety of passive recreation spaces with abutting natural resources and associated riparian protection; and implement riparian enhancement measures and stormwater management features.
 |
 |
C.5.a.1.
Provide appropriate bicycle and pedestrian circulation, including pedestrian paths and a multi-use path, to and through public open space areas for a wide range of potential users.
C.5.a.2.
Create scenic river overlooks and viewpoints with safe public access that include clearings and long views through the coterminous Riparian and Willamette Greenway Setback area in the vicinity of the intersection of the north-south streets and the park blocks with the riverfront street in the Franklin Riverfront, and no more than one-half mile apart in the McVay Riverfront. Provide amenities, including, but not limited to, benches and seating areas along the multi-use path, where appropriate.
C.5.a.3.
Create multiple viewsheds through the riparian area at various elevations by utilizing a mix of understory and canopy vegetation, including the clustering of trees, to discourage illegal activities and to visually connect the development areas with the Willamette River and the remainder of Springfield.
C.5.a.4.
Require development and/or redevelopment to avoid restricting access to the Riverfront Linear park and to avoid or minimize obstructing scenic views of the Willamette River corridor.
C.5.a.5.
Provide opportunities for passive recreation, including, but not limited to, picnicking, sitting, reading, and wildlife viewing by utilizing features such as park furniture, picnic tables, benches, seating areas, and restroom facilities.
C.5.a.6.
Create unique identities for the public open space, including, but not limited to, featuring distinctive design elements in seating, lighting, paving, interpretive kiosks, and public art.
C.5.a.7.
Establish an educational component for the linear park to include the natural and cultural history of the Glenwood Riverfront.
C.5.a.8.
Utilize a combination of hard-surfaced areas, landscaping, and natural vegetation that is adapted for survival and growth in the Eugene-Springfield area and is maintenance friendly.
C.5.a.9.
Utilize riverbank stabilization strategies that enhance the river and riverbank ecosystems. Ensure that riverbank plantings provide habitat value while preserving views.
C.5.a.10.
Integrate a variety of vegetation, above and below the top of bank that supports the riverbank and riverbank habitats.
C.5.a.11.
Utilize riparian setback areas for stormwater management and water quality treatment, as described in the Stormwater Quality Management section of this Chapter. (6279)
C.6 Stormwater Quality Management.
C.6.a.
Ensure adequate Stormwater Quality Management planning, emphasizing the natural hydrologic processes that minimize negative impacts on water quality, flow volumes, duration, and quantity resulting from development and redevelopment.
C.6.a.1.
Capture the first one inch of rainfall in a 24-hour period through the use of on-site Low Impact Development approaches techniques.
C.6.a.2.
Utilize techniques that slow and retain stormwater runoff on-site, in order to reduce peak storm flows.
C.6.a.3.
Reduce impervious surfaces by using techniques, including, but not limited to, permeable surfaces; green roofs; and narrow streets.
C.6.a.4.
Utilize techniques for filtering contaminants from surface runoff before it enters the Willamette River to protect and enhance water quality.
C.6.a.5.
Utilize the Riparian Setback for stormwater filtering, groundwater recharge, and overland sheet flows, where possible.
C.6.a.6.
Utilize planting standards found in the Springfield Engineering Design Standards and Procedures Manual for vegetative treatment and riparian areas.
C.6.a.7.
Integrate innovative stormwater management systems into the site design by using green roofs, the incorporation of pervious surfaces, and other systems that reuse stormwater to irrigate landscape plantings.
C.6.a.8.
Utilize portions of the park block areas for treatment of stormwater runoff from adjacent streets and conveyance of treated stormwater to management and/or water quality treatment areas.
C.6.a.9.
Initiate a Stormwater Capital Improvement Plan project for improving stormwater capacity and riparian habitat along selected existing sloughs and waterways in the Glenwood Riverfront.
C.6.a.10.
Provide requirements and incentives for green infrastructure for stormwater management, including, but not limited to, legalizing all types of green infrastructure, particularly for downspout disconnection and rainwater harvesting through building code policies or amendments; and establishing payment-in-lieu for developing off-site and nearby neighborhood or semi-regional stormwater management facilities. (6279)
D.1 New Housing Development.
D.1.a.
Provide financial incentives for the development of new high-density housing units, including affordable housing units, through the Springfield Economic Development Agency's (SEDA) tax increment-funded programs, as funding becomes available.
D.1.a.1.
Pursue opportunities to collaborate with SEDA to set aside captured tax increment funds for the development of affordable housing.
D.1.a.2.
Explore the feasibility of collaborating with SEDA to require the execution of some form of a "Community Benefit Agreement"* for housing development that receives financial support from SEDA.
D.1.a.3.
Explore the feasibility of collaborating with SEDA to require new high-density housing units developed with the assistance of SEDA to provide a variety of unit sizes and occupancy opportunities.
D.1.b.
Provide financial incentives for the development of new high-density affordable housing units through local, state, and federally-funded housing and community development programs, as annexation occurs and funding becomes available.
D.1.b.1.
Explore the feasibility of requiring new high-density housing units developed with the assistance of housing and community development programs to provide a variety of unit sizes and occupancy opportunities.
D.1.b.2.
Consider prioritizing housing and community development investments for qualified housing and community development projects.
D.1.b.3.
Explore the possibility of partnering with Eugene and Lane County, through the Intergovernmental Housing Policy Board, to establish a regional housing trust fund.**
D.1.b.4.
Establish a Vertical Housing Development Zone.***
D.1.b.5.
Seek opportunities to land bank for affordable housing development.
D.1.b.6.
Pursue opportunities to incentivize and support future innovative affordable housing options that may arise over the course of the Plan period.
D.1.c.
Prioritize and offer opportunities for Glenwood residents who qualify for new Springfield- and SEDA-assisted housing to relocate to such housing units.
D.1.d.
Scope and plan projects to effectively develop and implement programs that provide development incentives, such as density bonuses, to developers that agree to include affordable housing in their development mix.
D.1.e.
Evaluate and develop parking standards for inclusion in the Glenwood Riverfront Mixed-Use Plan District that support Plan goals for housing that meet the needs of a range of households and support multi-modal transportation choice, maximize efficient and economical use of the residential land supply, and provide sufficient parking to meet demand, in conjunction with an access system that provides balanced travel mode options. (6279)
* | As defined by the Partnership for Working Families, a community benefit agreement is "a project-specific negotiated agreement between a developer and a broad community coalition that outlines the project's contributions to the community and ensures community support for the project." |
** | Housing trust funds are distinct funds established by city, county, or state governments that receive ongoing dedicated sources of public funding to support the preservation and production of affordable housing and increase opportunities for households to access decent affordable homes. Housing trust funds systemically shift affordable housing funding from annual budget allocations to the commitment of dedicated public revenue. |
*** | A Vertical Housing Development Zone (VHZ) is an area designated by local jurisdictions to encourage dense, mixed-use developments. Eligible projects within a VHZ may receive partial property tax exemptions, which vary based on the number of "equalized floors" in the development, with a maximum property tax exemption of 80% over a 10-year period. An additional partial property tax exemption may be given if some or all of the residential housing is for low-income persons (80% of area median income or below). |
D.2 Existing Housing Stock-Manufactured Home Parks.
D.2.a.
Allow existing residential uses in manufactured home parks to continue under the pre-existing non-conforming use provisions of the Springfield Development Code.
D.2.b.
Rely on State laws and regulations, while responding with applicable referrals to available services, to address the needs of individual manufactured home park tenants.
D.2.c.
Consider providing financial assistance for mandated expenses of relocation or displacement of residents from potentially closed manufactured home parks through SEDA's tax increment-funded programs, as funding becomes available.
D.2.d.
Explore the feasibility of partnering with a non-profit or for-profit entity to acquire land and develop a new manufactured home park in Springfield or other affordable housing opportunities for relocating potentially displaced manufactured home park residents. (6279)
D.3 Existing Housing Stock Single-Family Dwelling Units.
D.3.a.
Allow existing residential uses to continue under the pre-existing non-conforming use provisions of the Springfield Development Code.
D.3.b.
Continue existing programs designed to help improve the housing stock through Federal housing and community development programs and tax increment funded programs. (6279)
D.4 Economic Development-Commercial and Industrial Buildable Land Supply.
D.4.a.
Prohibit land division of parcels greater than 20 acres that are designated Employment Mixed-Use, unless developed according to an approved Master Plan.
D.4.b.
Prohibit land division of parcels greater than one acre that are designated Commercial Mixed-Use or Office Mixed-Use, unless developed according to an approved Master Plan. (6279)
D.5 Economic Development-Existing Businesses.
D.5.a.
Provide financial incentives for renovation of current commercial and industrial uses compatible with this Plan's goals and objectives through SEDA's tax increment-funded programs, as funding becomes available.
D.5.b.
Provide financial incentives to businesses for wastewater and other utility service improvements, as well as annexation, when applicable and as funding becomes available.
D.5.c.
Enhance investment and re-investment in the community by supporting expansion of existing businesses that are suitable for and conform to the Glenwood Riverfront's long-term redevelopment and land use plans.
D.5.d.
Provide creative financing approaches to facilitate large-scale infrastructure development, when applicable and as funding becomes available.
D.5.e.
Consider providing financial incentives for relocation elsewhere in Springfield of existing businesses found to be in non-conformance with the Glenwood Riverfront's long-term redevelopment and land use plans through SEDA's tax increment-funded programs, as funding becomes available. (6279)
D.6 Economic Development-New Businesses.
D.6.a.
Support and encourage development in appropriate areas, as identified in the Land Use & Built Form Chapter, to generate property tax revenue.
D.6.b.
Maximize public investments in planned land uses to enhance the Glenwood Riverfront's long-term economic future.
D.6.c.
Provide financial incentives to assist developers in solving critical problems and overcoming barriers to development as annexation occurs and funding becomes available.
D.6.d.
Inform and guide property owners and developers through the development process by mitigating identified development constraints.
D.6.e.
Encourage the expansion and development of value-added business to produce jobs that match the current and future labor force by considering wage levels, employment stability, and training and hiring opportunities for local workers, youth, and protected classes.
D.6.f.
Leverage the community's resources to the maximum extent possible with private investment and, where appropriate, with other public funding sources, such as state and federal grants.
D.6.g.
Provide supportive programs and incentives to demonstrate how development controls and design standards can be implemented, included in development projects, and built where such protections need to be stringent.
D.6.h.
Link certain public improvements to adjust to the shifts from rural-like and separated industrial uses to urban mixed-use development.
D.6.i.
Ensure orderly sequencing of development through incentives to maximize use of existing and anticipated investments in public resources and facilities; leverage private investments to the maximum extent practicable; and minimize, mitigate, or offset potential negative impacts on new investments, neighborhoods, parks, and other uses.
D.6.j.
Provide suitable assistance in areas for growth, development, and redevelopment to increase employment opportunities for the local labor force at all wage levels, but especially for wage levels that allow individuals to support themselves and their households.
D.6.k.
Provide creative financing approaches to facilitate large scale infrastructure development, when applicable and as funding becomes available. (6279)
E.1 Wastewater Facilities and Services-Private Wastewater System.
E.1.a.
Allow the use of on-site wastewater systems in unincorporated areas of the Glenwood Riverfront to continue and/or expand as may be permitted in the Oregon Administrative Rules, Springfield Development Code and Springfield Municipal Code, unless a health hazard is declared as specified in Oregon Revised Statutes.
E.1.b.
Collaborate with property owners to eventually eliminate on-site wastewater systems as properties are annexed to Springfield. (6279)
E.2 Wastewater Facilities and Services-Public Wastewater System.
E.2.a.
Provide wastewater service in response to a demand for increased urban levels of development and adopted Capital Improvement Plan (CIP) priorities.
E.2.a.1.
Evaluate and monitor the capacity of the Glenwood Pump Station to determine if additional pumps are necessary, and if so, place the project on the CIP.
E.2.a.2.
Either upgrade or decommission the Nugget Way Pump Station, as funding becomes available.
E.2.a.3.
Complete the extension of the Glenwood Trunk Sewer, as funding becomes available. (6279)
E.3 Wastewater Facilities and Services-Water Reuse and Decentralized Design.
E.3.a.
Explore opportunities to support the implementation of water reuse practices, including, but not limited to, rainwater, stormwater, graywater, blackwater, and recycled water, as properties redevelop and develop.
E.3.b.
Collaborate with the Metropolitan Wastewater Management Commission (MWMC) to implement planned water recycling projects, as properties redevelop and develop. (6279)
E.4 Stormwater Facilities and Services-Private Stormwater Management Systems.
E.4.a.
To the extent practicable, amend the Springfield Development Code and the Springfield Engineering Design Standards and Procedures Manual to facilitate the use of LID techniques to achieve stormwater quality and optimal capacity management.
E.4.b.
Allow the use of mechanical stormwater treatment, where necessary.
E.4.c.
Allow the use of public infrastructure (if available for overflow capacity) where necessary. (6279)
E.5 Stormwater Facilities and Services-Public Stormwater System.
E.5.a.
Provide stormwater runoff management in response to a demand for urban levels of development and adopted CIP priorities.
E.5.a.1.
Provide treatment and conveyance of stormwater runoff for new public facilities.
E.5.a.2.
Provide for conveyance of treated stormwater from private development to receiving areas, such as the Glenwood Slough and the Willamette River.
E.5.a.3.
Provide treated emergency overflow conveyance to receiving waters to meet Council Stormwater Goal 1: Protect citizens and property from flooding (Springfield Stormwater Management Plan, Chapter 4) from large rainstorm events, where possible. (6279)
E.6 Electric Facilities and Services-System Capacity.
E.6.a.
Collaborate with the Springfield Utility Board (SUB) to increase the capacity of the electric system to meet future development needs.
E.6.a.1.
Evaluate potential locations for and construct a future substation in Glenwood in coordination with expected development.
E.6.a.2.
Locate and design the future substation and transmission, distribution, and service facilities as specified in the Utility Placement and Adverse Environmental, Visual, and Health Impacts section.
E.6.a.3.
Make electric service available as part of the Land Division and Site Plan Review processes. (6279)
E.7 Electric Facilities and Services-Utility Placement and Adverse Environment, Visual, and Health Impacts.
E.7.a.
Coordinate with SUB to develop criteria for locating and obscuring electric facilities that consider visual, auditory, health and environmental impacts; pedestrian mobility; operational ease; and initial costs and maintenance costs in association with proposed development in the Glenwood Riverfront.
E.7.b.
Consider views, visual pollution, public health, natural environment, and noise pollution in locating and obscuring transmission facilities.
E.7.b.1.
Follow natural landforms in aligning transmission lines while avoiding alignments along hillcrests or steep grades that expose the facilities to views; and cross hills obliquely rather than at right angles.
E.7.b.2.
Align transmission lines along edges of land uses to avoid scenic areas and to avoid dividing land use patterns.
E.7.b.3.
Utilize trees to provide a backdrop to minimize the silhouette of transmission lines against the sky.
E.7.b.4.
Reduce the length of visible segments of transmission lines by interrupting views with trees or offsetting the location of segments behind trees and other topographic features where long views of the transmission lines would otherwise occur.
E.7.b.5.
Minimize the "tunnel effect" of long, straight, uninterrupted views along transmission lines by only clearing vegetation that threatens the lines and by jogging the alignment at road crossings.
E.7.b.6.
Minimize the number of transmission poles and consider color and materials in designing the appearance of transmission poles and line attachments so that they blend harmoniously with their surroundings.
E.7.b.7.
Route and locate transmission lines to minimize or eliminate the need for vegetation management.
E.7.b.8.
Route and locate transmission lines to minimize potential health effects and noise pollution on Glenwood residents.
E.7.b.9.
Route and locate transmission lines to minimize potential effects on avian migratory patterns.
E.7.c.
Consider views and visual pollution in locating and obscuring distribution lines.
E.7.c.1.
Coordinate with SUB to locate new distribution feeder lines underground as part of the Franklin Boulevard and McVay Highway transportation facility upgrades.
E.7.d.
Consider views, visual pollution, and pedestrian mobility in locating and obscuring feeder lines, transformers, junction boxes, vaults and equipment cabinets.
E.7.d.1.
Locate or relocate service lines underground in coordination with proposed streets, driveways, accessways, and paths.
E.7.d.2.
Coordinate the routing or re-routing of service lines with private developers to minimize potential detrimental effects on the layout of new development/redevelopment.
E.7.d.3.
Locate transformers, equipment cabinets, vaults and junction boxes within buildings or underground, where possible; where not possible, locate these facilities outside of pedestrian routes, such as sidewalks, crosswalks, and building entrances, and utilize landscaping and public art to make these facilities as unobtrusive as possible on the public realm/streetscape.
E.7.e.
Consider views and visual pollution in locating and obscuring the future substation.
E.7.e.1.
Locate the substation in an industrial or employment-designated parcel outside of the boundary of the Phase I Glenwood Riverfront.
E.7.e.2.
Obscure the substation and transformer from public view and attenuate the noise generated by these facilities by means of plant materials, earth berms, or enclosure walls. (6279)
E.8 Water Facilities and Services System Capacity.
E.8.a.
Provide water service either directly or by contract.
E.8.a.1.
Continue to contract with the Eugene Water and Electric Board (EWEB) for the use of their transmission pipeline to provide a looped water system in south Glenwood until both utilities agree upon an alternative.
E.8.a.2.
Continue to contract with the Glenwood Water District (GWD) to provide water service to customers in the unincorporated portions of Glenwood until the GWD is dissolved.
E.8.a.3.
Monitor development in Glenwood and establish a plan for the construction of additional water mains.
E.8.b.
Determine the appropriate timing for dissolution of the GWD.
E.9 Water Facilities and Services-Utility Placement and Adverse Visual and Walkability Impacts.
E.9.a.
Coordinate with SUB to develop criteria for locating and obscuring water facilities that consider: visual, auditory, health, and environmental impacts; pedestrian mobility; operational ease; and initial costs and maintenance costs in association with proposed development in the Glenwood Riverfront.
E.9.b.
Consider views, visual pollution, and pedestrian mobility in locating and obscuring water meters, backflow prevention devices, and other above-grade water apparatus.
E.9.b.1.
Locate or relocate water lines in coordination with proposed streets, driveways, accessways, and paths.
E.9.b.2.
Coordinate the routing or re-routing of service lines and above-grade water apparatus with private developers to minimize potential detrimental effects on the layout of new development/redevelopment.
E.9.b.3.
Locate above-grade water apparatus, including, but not limited to, water meters and backflow prevention devices outside of pedestrian routes such as sidewalks, crosswalks, and building entrances; and utilize landscaping and public art to make these facilities as unobtrusive as possible on the public realm/streetscape. (6279)
E.10 Police Facilities and Services-System Capacity.
E.10.a.
Make Springfield Police services available for those properties within the City limits.
E.10.a.1.
Offer services as specified in Springfield's Long Range Plan for Police Services.
E.10.b.
Continue to rely on Lane County Sheriff and Oregon State Police services available for those properties outside of the city limits until annexation to Springfield occurs. (6279)
E.11 Fire and Emergency Medical Facilities and Services-System Capacity.
E.11.a.
Make Springfield fire and emergency medical services available for properties within the city limits.
E.11.a.1.
Consider the impact of a merger between Springfield's Department of Fire and Life Safety and Eugene's Department of Fire and Emergency Services when evaluating emergency response capability in the Glenwood Riverfront, even after annexation to the City.
E.11.b.
Consider siting a new fire station in the southwest corner of Subarea C in the event a merger of the Springfield and Eugene fire departments occurs.
E.11.c.
Consider the relocation of Springfield Fire Station #4 closer to the Pioneer Parkway/Main Street intersection to better balance overall system response time and equipment capabilities for West Springfield and East Glenwood.
E.12 School Facilities and Services-System Capacity.
F.1 Annexation Process.
F.1.a.
Continue recognizing existing public agency service agreements on land outside of the city limits until annexation occurs.
F.1.b.
Provide for annexation of urbanizable land to occur in a manner consistent with State law and the Metro Plan, as well as City annexation policies and procedures.
F.1.c.
Provide for annexation on a voluntary basis, except when health and safety concerns trigger the need for mandatory annexation, consistent with State law. (6279)
G.1 Historic and Cultural Resources.
G.1.a.
Collaborate with the Springfield Historic Commission to complete an historic context statement for Glenwood to provide an understanding of the trends and events that influenced the development of the area and to provide a better context for evaluating the significance of Glenwood's potential historic resources, as funding becomes available.
G.1.b.
Collaborate with the Springfield Historic Commission to identify potential projects and themes to memorialize significant historic structures, sites, events, and/or people in Glenwood in the design of public art and public spaces in the Glenwood Riverfront, upon completion of an historic context statement for Glenwood.
G.1.c.
Collaborate with the Springfield Historic Commission to continue the survey and inventory process for potentially historic resources and identify significant historic resources, as funding becomes available.
G.1.d.
Support efforts of the Springfield Historic Commission and property owners in seeking local and/or national landmark designation for significant historic resources.
G.1.e.
Require sufficient consideration and documentation by property owners of identified potentially significant historic resources so that future development, redevelopment, and/or demolitions fully address the identified resources, either through on-site preservation, off-site preservation, or through archival documentation of the resource.
G.1.e.1.
Develop Glenwood Riverfront Mixed-Use Plan District standards specifying documentation requirements for 3007 Franklin Boulevard, 3600 Franklin Boulevard, 3698 Franklin Boulevard, 3787 Franklin Boulevard, 3998 Franklin Boulevard, 4206 Franklin Boulevard, 295 N. Brooklyn Street, 1475 S. Brooklyn Street, and any future identified potentially significant historic resources.
G.1.f.
Continue to regulate the preservation, management, and restoration of historic resources that are added to the City's Historic Landmark Inventory through the Springfield Development Code's Historic Overlay District.
G.1.g.
Coordinate with the State Historic Preservation Office to develop a probability model that depicts the location of areas with a high probability of archaeological sites and/or buried human remains, as funding becomes available.
G.1.h.
Encourage developers to conduct an archaeological survey to determine whether objects of cultural or archaeological significance exist prior to excavation of land in areas with a high probability of archaeological sites and/or buried human remains, as development or redevelopment occurs.
G.1.i.
Support efforts of the Springfield Historic Commission to restore, preserve, or memorialize sites, objects, or areas of cultural or archaeological significance. (6279)
A Overview.
1.
The Santa Barbara Urban Hydrograph (SBUH) method was developed by the Santa Barbara County Flood Control and Water Conservation District to determine a runoff hydrograph for an urbanized area.
B Elements Of the Santa Barbara Urban Hydrograph (SBUH) Method.
C Land Area.
1.
The total area, including the pervious and impervious areas within a drainage basin, shall be quantified in order to evaluate critical contributing areas and the resulting site runoff.
2.
Each area within a basin shall be analyzed separately and their hydrographs combined to determine the total basin hydrograph.
3.
Areas shall be selected to represent homogenous land use/development units.
D Time of Concentration.
1.
Time of concentration, Tc, is the time for a theoretical drop of water to travel from the furthest point in the drainage basin to the facility being designed. (In this case, Tc is derived by calculating the overland flow time of concentration and the channelized flow time of concentration.) Tc depends on several factors, including ground slope, ground roughness, and distance of flow. The following formula for determining Tc is:
c.
Where,
i.
Tt = travel time, minutes
ii.
Tc = total time of concentration, minutes (minimum Tc = 5 minutes)
iii.
L = flow length, feet
iv.
V = average velocity of flow, feet per second
v.
n = Manning's roughness coefficient for various surfaces
vi.
s = slope of the hydraulic grade line (land or watercourse slope), feet per foot
d.
When calculating Tc, the following limitations apply:
i.
Overland sheet flow (flow across flat areas that does not form into channels or rivulets) shall not extend for more than 300 feet.
ii.
For flow paths through closed conveyance facilities such as pipes and culverts, standard hydraulic formulas shall be used for establishing velocity and travel time.
iii.
Flow paths through lakes or wetlands may be assumed to be zero (i.e., Tc = 0).
E Runoff Curve Numbers.
1.
The runoff curve numbers approved for water quantity/quality calculations are included as Table C-2 of this appendix.
2.
The curve numbers presented in Table C-2 are for wet antecedent moisture conditions. Wet conditions assume previous rainstorms have reduced the capacity of soil to absorb water. Given the frequency of rainstorms in this area, wet conditions are most likely and give conservative hydrographic values.
F Design Storm.
1.
The SBUH method also requires a design storm to perform the runoff calculations. For flow control calculations, use NRCS Type 1A 24-hour storm distribution. This storm is shown in Figure C-1 and Table C-4. The depth of rainfall for the 2 through 100-year storm events is shown below in Table C-1.
Table C-1 24-HOUR RAINFALL DEPTHS | |||||
|---|---|---|---|---|---|
Recurrence Interval, Years | 2 | 5 | 10 | 25 | 100 |
Flood Control, Destination: 24-Hour Depths, Inches | 3.12 | 3.6 | 4.46 | 5.18 | 6.48 |
Water Quality Storm - Pollution reduction: 24-Hour Depths, 1.4 Inches | |||||
Table C-2 Runoff Curve Numbers | |||||
|---|---|---|---|---|---|
Cover description | Curve numbers for hydrologic soil group | ||||
Cover type | Hydrologic condition | A | B | C | D |
Runoff curve numbers for urban areas* | |||||
Open space (lawns, parks, golf courses, cemeteries, etc.): | |||||
Grass cover <50% | 68 | 79 | 86 | 89 | |
Grass cover 50% to 75% | 49 | 69 | 79 | 84 | |
Grass cover >75% | 39 | 61 | 74 | 80 | |
Impervious areas: | |||||
Paved parking lots, roofs, driveways, etc. (excluding right-of-way) | 98 | 98 | 98 | 98 | |
Streets and roads: | |||||
Paved; curbs and storm sewers (excluding right-of-way) | 98 | 98 | 98 | 98 | |
Paved; open ditches (including right-of-way) | 83 | 89 | 92 | 93 | |
Gravel (including right-of-way) | 76 | 85 | 89 | 91 | |
Dirt (including right-of-way) Urban districts: | 72 | 82 | 87 | 89 | |
Urban districts: | |||||
Commercial and business | 89 | 92 | 94 | 95 | |
Industrial | 81 | 88 | 91 | 93 | |
Residential districts by average lot size: | |||||
1/8 acre or less (town houses) | 77 | 85 | 90 | 92 | |
1/4 acre | 61 | 75 | 83 | 87 | |
1/3 acre | 57 | 72 | 81 | 86 | |
1/2 acre | 54 | 70 | 80 | 85 | |
1 acre | 51 | 68 | 79 | 84 | |
2 acres | 46 | 65 | 77 | 82 | |
Runoff curve numbers for other agricultural lands* | |||||
Pasture, grassland, or range-continuous forage for grazing | |||||
<50% ground cover or heavily grazed with no mulch | Poor | 68 | 79 | 86 | 89 |
50 to 75% ground cover and not heavily grazed | Fair | 49 | 69 | 79 | 84 |
>75% ground cover and lightly or only occasionally grazed | Good | 39 | 61 | 74 | 80 |
Meadow-continuous grass, protected from grazing and generally mowed for hay | - | 30 | 58 | 71 | 78 |
<50% ground cover | Poor | 48 | 67 | 77 | 83 |
50 to 75% ground cover | Fair | 35 | 56 | 70 | 77 |
>75% ground cover | Good | 30 | 48 | 65 | 73 |
Woods-grass combination (orchard or tree farm) | Poor | 57 | 73 | 82 | 86 |
Fair | 43 | 65 | 76 | 82 | |
Good | 32 | 58 | 72 | 79 | |
Woods | |||||
Forest litter, small trees, and brush are destroyed by heavy grazing or regular burning. | Poor | 45 | 66 | 77 | 83 |
Woods are grazed but not burned, and some forest litter covers the soil. | Fair | 36 | 60 | 73 | 79 |
Woods are protected from grazing, and litter and brush adequately cover the soil. | Good | 30 | 55 | 70 | 77 |
Runoff curve numbers for Simplified Approaches** | |||||
Eco-roof | Good | n/a | 61 | n/a | n/a |
Roof Garden | Good | n/a | 48 | n/a | n/a |
Contained Planter Box | Good | n/a | 48 | n/a | n/a |
Infiltration & Flow-Through Planter Box | Good | n/a | 48 | n/a | n/a |
Pervious Pavement | - | 76 | 85 | 89 | n/a |
Trees | |||||
New and/or Existing Evergreen | - | 36 | 60 | 73 | 79 |
New and/or Existing | - | 36 | 60 | 73 | 79 |
Deciduous | |||||
n/a - Does not apply, as design criteria for the relevant mitigation measures do not include the use of this soil type |
*Soil Conservation Service, Urban Hydrology for Small Watersheds, Technical Release 55, pp. 2.5-2.8, June 1986. |
**CNs of various cover types were assigned to the Proposed Simplified Approaches with similar cover types as follows: |
Eco-roof - Assumed grass in good condition with soil type B. |
Roof Garden - assumed brush-weed-grass mixture with >75% ground cover and soil type B. Contained Planter Box - Assumed brush-weed-grass mixture with >75% ground cover and soil type B. |
Infiltration & Flow-Through Planter Box - Assumed brush-weed-grass mixture with >75% ground cover and soil type B. |
Pervious Pavement - Assumed gravel. |
Trees - Assumed woods with fair hydrologic conditions. |
Note: To determine hydrologic soil type, consult local USDA Soil Conservation Service Soil Survey. |
Table C-3 NRCS Hydrologic Soil Group Descriptions | |
|---|---|
NRCS Hydrologic Soil Group | Description |
Group A | Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist chiefly of deep, well drained to excessively drained sands or gravels. These soils have a high rate of water transmission. |
Group B | Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. |
Group C | Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils that have a layer that impedes the downward movement of water or soils that have a moderately fine texture. These soils have a slow rate of water transmission. |
Group D | Soils having a very slow infiltrate rate (high runoff potential) when thoroughly wet. These consist chiefly of clay soils that have a high shrink-swell position, soils that have a permanent high water table, soils that have a fragipan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. |
Figure C-4 NRCS 24-Hour Type 1A Hyetograph  |
Table C-5 NRCS Type 1A Hyetographic Distribution - For Use In Water Quality/Quantity Design |
|---|
 |
A Applicability.
1.
To properly size and locate stormwater management facilities, it is necessary to characterize the soil infiltration conditions at the location of the proposed facility. All projects that propose onsite infiltration must evaluate existing site conditions and determine:
a.
If the infiltration rate is adequate to support the proposed stormwater management facility (satisfied through presence of mapped NRCS Type A & B Soils or the Simplified Approach infiltration test); or
b.
The design infiltration rate prior to facility design (satisfied through the Presumptive Approach infiltration testing conducted by a qualified professional).
The following sections provide the approved standard infiltration testing specifications. |
B Simplified Approach Open Pit Infiltration Test.
1.
The purpose of the simplified approach is to provide a method which can be conducted by a nonprofessional for design of simple stormwater systems on small projects.
2.
The simplified approach open pit test is applicable only to projects on private property with less than 15,000 square feet of new or redeveloped impervious area.
a.
The results of infiltration testing must be documented on the Simplified Approach Form.
b.
The simplified approach cannot be used to find a design infiltration rate.
c.
The intent of the open pit test is to determine whether or not the local infiltration rate is adequate (2 inches/hour or greater) for the predesigned stormwater facilities described in Appendix F of the EDSPM (Infiltration swales, basins, planters, drywells, and trenches).
d.
The simplified approach infiltration test does not need to be conducted by a licensed professional.
C Simplified Approach Procedure.
1.
A simple open pit infiltration test is required for each facility designed through the simplified approach. The test should be where the facility is proposed or within the immediate vicinity.
a.
Excavate a test hole to the depth of the bottom of the infiltration system, or otherwise to 4 feet.
i.
The test hole can be excavated with small excavation equipment or by hand using a shovel, auger, or post hole digger.
ii.
If a layer hard enough to prevent further excavation is encountered, or if noticeable moisture/water is encountered in the soil, stop and measure this depth from the surface and record it on the simplified approach form. Proceed with the test at this depth.
iii.
Fill the hole with water to a height of about 6 inches from the bottom of the hole, and record the exact time. Check the water level at regular intervals (every 1 minute for fast draining soils to every 10 minutes for slower-draining soils) for a minimum of 1 hour or until all of the water has infiltrated. Record the distance the water has dropped from the top edge of the hole.
iv.
Repeat this process 2 more times, for a total of 3 rounds of testing.
v.
These tests should be performed as close together as possible to accurately portray the soil's ability to infiltrate at different levels of saturation. The third test provides the best measure of the saturated infiltration rate.
b.
For each test pit required, submit all 3 testing results with the date, duration, drop in water height, and conversion into inches per hour.
c.
If the results of the Simplified Approach open pit test show an infiltration rate greater than 2.0 inches per hour, the applicant can proceed with simplified approach facility design (where applicable).
d.
If the applicant would like to use an infiltration rate for design purposes, a presumptive infiltration test must be conducted.
D Presumptive Infiltration Testing.
1.
The presumptive approach must be used for all public and private developments where the simplified approach is not applicable.
2.
The qualified professional must exercise judgment in the selection of the infiltration test method.
4.
Where satisfactory data from adjacent areas is available that demonstrates infiltration testing is not necessary, the infiltration testing requirement may be waived.
5.
Waiver of the site specific testing is subject to approval by the City.
6.
Recommendation for foregoing infiltration testing must be submitted in a report which includes supporting data and is stamped and signed by the project engineer or geologist.
E Testing Criteria.
1.
Except for the simplified approach, all testing must be conducted or overseen by a qualified professional who is either a Professional Engineer, Registered Geologist, Soil Scientist or other professional testing service with equivalent training and experience in determining the permeability of soils.
2.
The depth of the test must correspond to the facility depth.
a.
If a confining layer is observed during the subsurface investigation to be within 4 feet of the bottom of the planned infiltration system, the testing should be conducted within that confining layer.
b.
Tests must be performed in the immediate vicinity of the proposed facility.
c.
Exceptions can be made to the test location provided the qualified professional can support that the strata are consistent from the proposed facility to the test location.
d.
Infiltration testing should not be conducted in engineered or undocumented fill.
F Minimum Number of Required Tests.
1.
The simplified approach requires 1 infiltration test for every proposed facility.
2.
The presumptive approach requires 1 infiltration test for every proposed facility or 1 test for every 100 feet of proposed linear facility.
3.
Generalized soil infiltration rates may be used if facilities are proposed in areas of consistent topography and soil strata as outlined in a geotechnical report.
G Factor of Safety.
1.
A minimum factor of safety of 2 shall be applied to field obtained infiltration rates where infiltration of the site performance standard storm per SDC 4.3.110 (B) is proposed.
H Presumptive Infiltration Testing Instructions.
1.
Open Pit Falling Head Procedure. The open pit falling head procedure is performed in an open excavation and therefore is a test of the combination of vertical and lateral infiltration.
a.
Excavate a hole with bottom dimensions of approximately 2 feet by 2 feet into the native soil to the elevation of the proposed facility bottom. Smooth excavations should be scratched and loose material removed.
b.
Fill the hole with clean water a minimum of 1 foot above the soil to be tested, and maintain this depth of water for at least 4 hours (or overnight if clay soils are present) to presoak the native material.
c.
Determine how the water level will be accurately measured. The measurements should be made with reference to a fixed point.
d.
After the presaturation period, refill the hole with water to 12 inches above the soil and record the time.
i.
Alternative water head heights may be used for testing provided the presaturation height is adjusted accordingly.
ii.
Measure the water level at 10-minute intervals for a total period of 1 hour (or 20-minute intervals for 2 hours in slower soils) or until all of the water has drained.
iii.
In faster draining soils (sands and gravels), it may be necessary to shorten the measurement interval in order to obtain a well-defined infiltration rate curve.
iv.
Constant head tests may be substituted for falling head tests at the discretion of the professional overseeing the infiltration testing.
e.
Repeat the test.
i.
Successive trials should be run until the percent change in measured infiltration rate between 2 successive trials is minimal.
ii.
The trial should be discounted if the infiltration rate between successive trials increases.
iii.
At least 3 trials must be conducted. After each trial, the water level is readjusted to the 12 inch level.
f.
The average infiltration rate over the last trial should be used to calculate the unfactored infiltration rate. The final rate must be reported in inches per hour.
g.
For very rapidly draining soils, it may not be possible to maintain a water head above the bottom of the test pit. A rate based test may be used if the infiltration rate meets or exceeds the flow of water into the test pit.
Note that a maximum infiltration rate of 20 inches per hour can be used in stormwater system design. |
I Encased Falling Head Test.
The encased falling head procedure is performed with a 6-inch casing that is embedded approximately 6 inches into the native soil. The goal of this field test is to evaluate the vertical infiltration rate through a 6-inch plug of soil, without allowing any lateral infiltration. The test is not appropriate in gravelly soils or in other soils where a good seal with the casing cannot be established.
1.
Embed a solid 6-inch diameter casing into the native soil at the elevation of the proposed facility bottom. Ensure that the embedment provides a good seal around the pipe casing so that percolation will be limited to the 6-inch plug of the material within the casing.
a.
This method can also be used when testing within hollow stem augers, provided the driller and tester are reasonably certain that a good seal has been achieved between the soil and auger.
2.
Fill the pipe with clean water a minimum of 1 foot above the soil to be tested, and maintain this depth for at least 4 hours (or overnight if clay soils are present) to presoak the native material.
a.
Any soil that sloughed into the hole during the soaking period should be removed.
b.
In sandy soils with little or no clay or silt, soaking is not necessary.
c.
If after filling the hole twice with 12 inches of water, the water seeps completely away in less than 10 minutes, the test can proceed immediately.
3.
To conduct the first trial of the test, fill the pipe to approximately 12 inches above the soil and measure the water level.
a.
Alternative water head heights may be used for testing provided the presaturation height is adjusted accordingly.
b.
The level should be measured with reference to a fixed point. Record the exact time.
c.
Measure the water level at 10-minute intervals for a total period of 1 hour (or 20-minute intervals for 2 hours in slower soils) or until all of the water has drained.
d.
In faster draining soils (sands and gravels), it may be necessary to shorten the measurement interval in order to obtain a well-defined infiltration rate curve.
i.
Constant head tests may be substituted for falling head tests at the discretion of the professional overseeing the infiltration testing.
ii.
Successive trials should be run until the percent change in measured infiltration rate between 2 successive trials is minimal.
iii.
The trial should be discounted if the infiltration rate between successive trials increases.
iv.
At least 3 trials must be conducted.
v.
After each trial, the water level is readjusted to the 12 inch level.
vi.
The average infiltration rate over the last trial should be used to calculate the unfactored infiltration rate.
vii.
Alternatively, the infiltration rate measured over the range of water head applicable to the project stormwater system design may be used at the discretion of the professional overseeing the testing.
viii.
The final rate must be reported in inches per hour.
J Double Ring Infiltrometer Test.
1.
The double-ring infiltrometer test procedure should be performed in accordance with ASTM 3385-94.
2.
The test is performed within 2 concentric casings embedded and sealed to the native soils. The outer ring maintains a volume of water to diminish the potential of lateral infiltration through the center casing. The volume of water added to the center ring to maintain a static water level is used to calculate the infiltration rate.
3.
The double-ring infiltrometer is appropriate only in soils where an adequate seal can be established.
K Reporting Requirements.
The following information should be included in the infiltration testing report. The infiltration testing report should be attached to the project's stormwater management report:
1.
Statement of project understanding (proposed stormwater system).
2.
Summary of subsurface conditions encountered.
3.
Summary of infiltration testing including location and number of tests and testing method used.
4.
Discussion of how the tests were performed (i.e. pipe type or diameter or test pit dimensions).
5.
Infiltration testing results in inches per hour.
6.
Recommended design infiltration rate including factors of safety.
7.
Groundwater observations within exploration and an estimate of the depth to seasonal high groundwater.
8.
Site plan showing location of infiltration tests.
9.
Boring or test pit logs.
a.
The logs should include an associated soil classification consistent with ASTM D2488-00, Standard Practice for Classification for Description and Identification of Soils (Visual-Manual Procedure).
b.
The logs should also include any additional pertinent subsurface information, such as soil moisture conditions, depth and description of undocumented or engineered fill, soil color and mottling conditions, soil stiffness or density, and approximate depth of contact between soil types.
10.
Infiltration Test Data.
A Introduction.
1.
Notice of Operations and Maintenance Agreement - (NOMA).
The NOMA must be in a form approved by the City Attorney and must identify the property as having a stormwater management facility and the responsible party for future operations and maintenance. The NOMA must be completed and recorded at Lane County Deeds and Records. Signatures on the NOMA shall be notarized.
The intent of the NOMA is to ensure that the facility will be identified to future property owners and that the facility will be maintained according to the Springfield Development Code, Springfield Municipal Code, the O&M Agreement, and the O&M Plan for the site.
2.
Operations and Maintenance Agreement - (O&M Agreement).
The O&M Agreement must be on a form approved by the City Attorney and must identify the property as having a stormwater management facility; the owner's name, address, email, and phone number; the site address; financially responsible party for ongoing operation and maintenance; and parties responsible for inspecting and maintaining the facility.
The O&M Agreement does not need to be recorded. The intent of the Agreement is to ensure that the facility will be maintained for functionality, aesthetics, and will identify accountability. The stormwater site plan attached to the Agreement will help identify to the owners and inspectors the location and the functions of the stormwater facilities, and the Facility Specific O&M Plan will identify the routine maintenance procedures and scheduling.
3.
Facility Specific Operations and Maintenance Plan - ( &M Plan).
This appendix provides pre-approved Facility Specific Operations and Maintenance Plans (O&M Plans) for various types of stormwater quality facilities. Stormwater facilities that are not included in this appendix (i.e. a manufactured stormwater treatment technology), are required to submit an O&M Plan that meets the manufacturer's requirements and facility specific operations and maintenance activities consistent with ongoing function of the stormwater facility(ies).
The O&M Plan strategies in this appendix apply to all stormwater management facilities and related facility components identified in SDC 4.3.110. Stormwater destination facilities are required to be operated and maintained in working condition for the life of the facility.
4.
Private Facilities.
Record a copy of the NOMA with Lane County Deeds and Records. Submit with the final site plan, a recorded copy of the NOMA, the O&M Agreement, and the Facility Specific Operations and Maintenance Plan (O&M Plan) for each type of stormwater management facility permitted on the site. The operations and maintenance activities listed on the O&M Plan documents, which will be on file with the City Engineer, may later be revised with City Engineer approval.
5.
Public Facilities.
Submit a copy of a Facility Specific O&M Plan with the Public Improvement Permit Project. County recording of this plan is not necessary.
B Operations and Maintenance Plan Submittals.
1.
Privately Maintained Facilities.
The O&M Plan for a privately maintained facility shall include the following components for each development site. A complete Plan must be submitted and approved as provided in SDC 4.3.110.
a.
A recorded copy of the Notice of Operation and Maintenance Agreement (NOMA)
b.
Operations and Maintenance Agreement (O&M Agreement)
c.
Stormwater Management Site Plan (as approved under the Development Agreement)
d.
Landscape Plan
e.
Stormwater Management Facility Inspection and Maintenance Log
f.
Facility-Specific Operations and Maintenance Plan(s) (O&M Plan(s))
2.
Detailed submission requirements for the above items are found below:
a.
Notice of Operations and Maintenance Agreement - (NOMA). The NOMA identifies the property as having a stormwater management facility and identifies the responsible party for future operations and maintenance. The Notice must be completed and recorded at Lane County Deeds and Records. Signatures on the Notice shall be notarized. The NOMA may be submitted in person or mailed, along with payment of the applicable fees, to the County Recorder's Office. Lane County Deeds and Records, 125 E 8th Avenue, Eugene, OR 97401.
https://www.lanecounty.org/government/county_departments/county_administration/operations/county_clerk/real_property_recording/document_recording_requirements
The property description on the NOMA must be a full legal description of the property and may not be a tax lot number. Legal descriptions may be obtained from the county assessor's office. The NOMA shall be printed on legal-sized (8 1/2 x 14) paper to facilitate the recording process. If printed on smaller paper, additional recording fees may apply.
b.
Operations and Maintenance Agreement — (O&M Agreement). The completed Agreement must identify the owner's name, address, and phone number, the site address, financial method used to cover future operation and maintenance, and parties responsible for inspecting and maintaining the facility. The O&M Agreement does not need to be recorded.
c.
Stormwater Management Site Plan. A copy of the Stormwater Management Site Plan shall be attached to the O&M Agreement. The Plan must show the location of the facility(ies) on the site, the sources of runoff entering the facility, and the ultimate stormwater destination.
d.
Landscape Plan. A Landscape Plan (if separate from the Stormwater Management Site Plan) shall be attached to the O&M Agreement. The Plan must show the location, density, plant size, quantity, and species by scientific and common name.
e.
Stormwater Management Facility Inspection and Maintenance Log. Stormwater Management Facility Inspection and Maintenance Logs must be kept on file by the facility owner(s). Logs should note all inspection dates, the facility components that were inspected, and any maintenance or repairs made. The Facility-Specific O&M Plans can serve as a checklist for what should be included in the Log (e.g. the facility elements that need to be inspected, frequency of inspection, conditions that indicate maintenance is needed, etc.). Logs must include the information listed in the form included in this appendix. Logs must be retained on site for a minimum of 2 years.
f.
Facility Specific Operations and Maintenance Plans - (O&M Plan). O&M Plans provided in this packet identify the specific operations and maintenance activities that are required for each of the approved stormwater management facilities listed in Appendix D Typical Facility Details. The appropriate Plan must be attached to the O&M Agreement and submitted as part of the application process. Applicants may either select and use the pre-approved Facility Specific O&M Plans provided in this packet or prepare a Facility Specific O&M Plan that incorporates the specific activities that corresponds with their chosen type of stormwater facilities through a Type II review process. The Facility Specific O&M Plans do not have to be recorded. This allows the future stormwater management facility owner to submit operations and maintenance activity revisions to the City without the need to re-record the O&M Plans with the County.
The facility specific operations and maintenance activities for private facilities may be modified any time after permit issuance subject to mutual agreement by the City and owner, in writing. Modifying the operations and maintenance activities is optional, and is intended to give the owner an opportunity to adjust maintenance needs according to site-specific history and conditions. Modifications may require the owner to apply for concurrent modification of a prior land use approval. Proposed modifications to the O&M Plan must be submitted, along with an updated O&M Agreement, to the City for review and approval.
g.
Operations and Maintenance Plans for Proprietary Facilities. Proprietary O&M Plans for approved proprietary facilities must describe the inspection, cleaning, and operation and maintenance criteria for the facility and provide manufacturer's recommended maintenance if applicable.
C Stormwater Management Facility Inspection and Maintenance Log.
Stormwater Management Facility Inspection and Maintenance Log |
|---|
 |
D Facility Specific Operations and Maintenance Plans.
Facility Specific Operations and Maintenance Plans | |
|---|---|
Eco-Roofs | |
Contained Planters | |
Permeable Pavement | |
Swales (Vegetated, Grassy and Street) | |
Level Spreaders | |
Vegetated Filter Strips | |
Stormwater Planters | |
Rain Gardens | |
Sand Filters | |
Soakage Trenches | |
Wet, Extended Wet, and Dry Ponds | |
Constructed Treatment Wetlands | |
Underground Detention Tanks, Vaults and Pipes | |
Drywells | |
Spill Control Manholes | |
Eco-Roofs Operations and Maintenance Plan | ||
|---|---|---|
Eco-Roofs are lightweight vegetated roof systems used in place of conventional roofs that retain and filter stormwater and provide aesthetic and energy conservation benefits. All facility components, including soil substrate or growth medium, vegetation, drains, irrigation systems (if applicable), membranes, and roof structure shall be inspected for proper operations, integrity of the waterproofing, and structural stability throughout the life of the eco-roof. All elements shall be inspected once a month from April through September. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | ||
Soil Substrate/Growing Medium shall be inspected for evidence of erosion from wind or water. If erosion channels are evident, they shall be stabilized with additional soil substrate/growth medium and covered with additional plants. | ||
Structural Components shall be operated and maintained in accordance with manufacturer's requirements. Drain inlets shall be kept unrestricted. | ||
• | Inlet/outlet pipe shall be cleared when soil substrate, vegetation, debris or other materials clog the drains. Sources of sediment and debris shall be identified and corrected. | |
• | Determine if drain pipe is in good condition and correct as needed. | |
Debris and Litter shall be removed to prevent clogging of drains and interference with plant growth. | ||
Vegetation shall be maintained to provide 90 percent plant cover. | ||
• | During the Establishment Period, plants shall be replaced once per month as needed. During the long-term period, dead plants shall generally be replaced once per year in the fall months. | |
• | Fallen leaves and debris from deciduous plant foliage shall be removed if build up occurs. | |
• | Nuisance and prohibited vegetation shall be removed when discovered. | |
• | Dead vegetation shall be removed and replaced with new plants. | |
• | Weeding shall be manual with no herbicides or pesticides used. Weeds shall be removed regularly and not allowed to accumulate. | |
• | Fertilization is not necessary and fertilizers shall not be applied. | |
• | During drought conditions, mulch or shade cloth may be applied to prevent excess solar damage and water loss. | |
• | Mowing of grasses shall occur as needed. Clippings shall be removed if build up occurs. | |
Irrigation can be accomplished either through hand watering or automatic sprinkler systems. If automatic sprinklers are used, manufacturers' instructions for operations and maintenance shall be followed. | ||
• | During the Establishment Period (1-3 years), water sufficient to assure plant establishment and not to exceed 1/4 inch of water once every 3 days shall be applied. | |
• | During the long-term period (3+ years), water sufficient to maintain plant cover and not to exceed 1/4 inch of water once every 14 days shall be applied. | |
Spill Prevention measures from mechanical systems located on roofs shall be exercised when handling substances that can contaminate stormwater. | ||
• | Releases of pollutants shall be corrected as soon as identified. | |
• | The presence of a green/eco-roof does not waive requirements for containment of mechanical systems. | |
Training and/or written guidance information for operating and maintaining rooftop gardens shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | ||
Access and Safety to the eco-roof shall be safe and efficient. | ||
• | Egress and ingress routes shall be maintained to design standards. Walkways shall be clear of obstructions and maintained to design standards. | |
Aesthetics of the rooftop garden shall be maintained as an asset to the property owner and community. | ||
• | Evidence of damage or vandalism shall be repaired and accumulation of trash or debris shall be removed upon discovery. | |
Insects shall not be harbored on the eco-roof. | ||
• | Standing water creating an environment for development of insect larvae shall be eliminated by manual means. Chemical sprays shall not be used. | |
Contained Planters Operations and Maintenance Plan | |||
|---|---|---|---|
Contained planters are designed to intercept rainfall that would normally fall on impervious surfaces. In this respect, contained planters convert impervious surfaces to pervious surfaces, decreasing the amount of stormwater runoff from a site. Water should drain through the planter within 3-4 hours after a storm event. All facility components and vegetation shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation and 2 times per year thereafter. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Filter Media consisting of sand or topsoil shall allow stormwater to percolate uniformly through the planter. | |||
• | Planter shall be excavated and cleaned, and gravel or soil shall be replaced to correct low infiltration rates. | ||
• | Holes that are not consistent with the design and allow water to flow directly through the planter to the ground shall be plugged. | ||
• | Litter and debris shall be removed routinely (e.g., no less than quarterly) and upon discovery | ||
Planter shall contain filter media and vegetation. | |||
• | Structural deficiencies in the planter including rot, cracks, and failure shall be repaired. | ||
Planter Reservoir receives and detains storm water prior to infiltration. If water does not drain from reservoir within 3-4 hours of storm event, sources of clogging shall be identified and corrected. Topsoil may need to be amended with sand or replaced all together. | |||
Vegetation shall be healthy and dense enough to provide filtering while protecting underlying soils from erosion. | |||
• | Mulch shall be replenished at least annually. | ||
• | Planter vegetation shall be irrigated to ensure survival. | ||
• | Vegetation or trees that limit access or interfere with planter operation shall be pruned or removed. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed. | ||
• | Nuisance and prohibited vegetation shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species (measured in a 10 x 10 foot plot) shall be removed and replaced. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when planter function is impaired. Vegetation shall be replaced within a specific timeframe, e.g., 3 months, or immediately if required to maintain cover density and control erosion where soils are exposed. | ||
Training and/or written guidance information for operating and maintaining planters shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the stormwater planter shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the planter shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored at the stormwater planter. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | Standing water creating an environment for development of insect larvae shall be eliminated. | ||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first nonchemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include, but are not limited to, the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of water levels approximately every 4 days in order to disrupt mosquito larval cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the stormwater planter shall be filled and compacted. | ||
Debris and Litter shall be removed to maintain soil health and to prevent interference with plant growth. | |||
Permeable Pavement Operations and Maintenance Plan | |||
|---|---|---|---|
Permeable Pavement is a porous pavement surface with an underlying stone reservoir that temporarily stores surface runoff before infiltrating into the subsoil or being collected in underlying drain pipes and being discharged off site. There are many types of permeable pavement including plastic rings planted with grass, stone or concrete blocks with pore spaces backfilled with gravel or sand, porous asphalt, and porous concrete. Permeable pavement accepts only precipitation, not stormwater runoff. All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Surface: In most permeable pavement design, the pavement itself acts as pretreatment to the stone reservoir below. The surface shall be kept clean and free of leaves, debris, and sediment. The surface shall not be overlaid with an impermeable paving surface. | |||
• | Regular sweeping shall be implemented for porous asphalt or concrete systems. Vacuum sweeping is preferred and can greatly prolong the effective life of the pavement. | ||
Overflows or Emergency Spillways are used in the event that the facility's infiltration capacity is exceeded. Overflow devices shall be inspected for obstructions or debris, which shall be removed upon discovery. Overflow or emergency spillways shall be capable of transporting high flows of stormwater to an approved stormwater receiving system. | |||
• | Sources of erosion damage shall be identified and controlled when native soil is exposed near the overflow structure. | ||
Vegetation (where applicable) shall be healthy and dense enough to provide filtering while protecting underlying soils from erosion. Vegetation, such as trees and shrubs, should not be located in or around the permeable pavement because roots from trees can penetrate the pavement, and leaves from deciduous trees and shrubs can increase the risk of clogging the surface. | |||
• | Vegetation and large shrubs/trees that limit access or interfere with porous pavement operation shall be pruned. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed. | ||
• | Poisonous, nuisance, dead or odor producing vegetation shall be removed immediately. | ||
• | Grass shall be mowed to less than 4 inches and grass clippings shall be bagged and removed. | ||
• | Irrigation shall be provided as needed. | ||
Source Control measures prevent pollutants from mixing with stormwater. Typical non-structural control measures include raking and removing leaves, street sweeping, vacuum sweeping, limited and controlled application of pesticides and fertilizers, and other good housekeeping practices. | |||
Spill Prevention measures shall be exercised when handling substances that can contaminate stormwater. A spill prevention plan shall be implemented at all non-residential sites and in areas where there is likelihood of spills from hazardous materials. However, virtually all sites, including residential and commercial, present potential danger from spills. All homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, solvents, pesticides, and cleaning aids that can adversely affect stormwater if spilled. It is important to exercise caution when handling substances that can contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. In addition, long term exposure to low levels of petroleum products, such as that form a leaky vehicle, can severely degrade the pavement. | |||
Training and/or written guidance information for operating and maintaining permeable pavement shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the permeable pavement shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. Obstacles preventing maintenance personnel and/or equipment access to the porous pavement shall be removed. Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | |||
Debris and Litter shall be removed to prevent clogging. | |||
Insects and Rodents shall not be harbored at the permeable pavement. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | Standing water creating an environment for development of insect larvae shall be eliminated. | ||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include, but are not limited to, the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the permeable pavement shall be filled and compacted. | ||
If used at this site, the following will be applicable: Signage may serve to educate people about the importance or function of the site's stormwater protection measures. It may also discourage behaviors that adversely affect stormwater protection measures. For example, if debris is a problem, a sign reminding people not to litter may partially solve the problem. Broken or defaced signs shall be replaced/repaired. | |||
Placing of permeable pavement on site: Permeable pavement should not be placed in any area where there is high likelihood of spills or contamination such as vehicle fueling areas, washing areas, loading docks, trash enclosures or material handling areas. Permeable pavement is not well suited to high traffic areas or areas where heavy vehicles will frequently travel. Such areas include parking lot lanes, entrance lanes and any areas subject to vehicle braking and turning movements. Parking lot stalls, emergency access areas and infrequently used areas are typically suitable for permeable pavement treatment. | |||
Swales (Vegetated, Grassy and Street) Operations and Maintenance Plan | |||
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Swales are vegetated or grassed open channels that trap pollutants by filtering and slowing flows, allowing particles to settle out. The swale should drain within 48 hours of a storm event. All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Swale Inlet (such as curb cuts or pipes) shall maintain a calm flow of water entering the swale. | |||
• | Source of erosion shall be identified and controlled when native soil is exposed or erosion channels are forming. | ||
• | Sediment accumulation shall be hand-removed with minimum damage to vegetation using proper erosion control measures. Sediment shall be removed if it is more than 3 inches thick or so thick as to damage or kill vegetation. | ||
• | Inlet shall be cleared when conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
• | Rock splash pads, spreaders and dissipaters shall be replenished to prevent erosion. | ||
Side Slopes shall be maintained to prevent erosion that introduces sediment into the swale. | |||
• | Slopes shall be stabilized and planted using appropriate erosion control measures when native soil is exposed or erosion channels are forming. | ||
Swale Media shall allow stormwater to percolate uniformly through the landscape swale. If the swale does not drain within 48 hours, it shall be tilled and replanted according to design specifications. | |||
• | Swale area shall be protected during construction from compaction. | ||
• | Annual or semi-annual tilling shall be implemented if compaction or clogging continues. | ||
• | Debris in quantities that inhibit operation shall be removed routinely (e.g., no less than quarterly), or upon discovery. | ||
Swale Outlet shall maintain sheet flow of water exiting swale unless a collection drain is used. Source of erosion damage shall be identified and controlled when native soil is exposed or erosion channels are forming. | |||
• | Outlets such as drains and overland flow paths shall be cleared when 50 percent of the conveyance capacity is plugged. | ||
• | Outlet structures shall be cleaned of sediment and debris at least 1 time per year or when the level is at 50 percent of the conveyance capacity. | ||
• | Sources of sediment and debris shall be identified and corrected. | ||
Vegetation shall be healthy and dense enough (at least 90 percent cover) to provide filtering while protecting underlying soils from erosion. Mulch shall be replenished as needed to ensure survival of vegetation. | |||
• | Vegetation, large shrubs or trees that interfere with landscape swale operation shall be pruned. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be removed if build up is damaging vegetation. | ||
• | Grassy swales shall be mowed to keep grass 4 inches to 9 inches in height. Clippings shall be removed when possible, to remove pollutants absorbed in grasses, or when build up is damaging vegetation. | ||
• | Nuisance and prohibited vegetation (such as blackberries and English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed and replaced. | ||
• | Dead vegetation and woody material shall be removed to maintain less than 10 percent of area coverage or when swale function is impaired. Vegetation shall be replaced within 3 months, or immediately if required to maintain cover density and control erosion where soils are exposed. | ||
Debris and Litter shall be removed to ensure stormwater conveyance and to prevent clogging of inlet and outlet drains and interference with plant growth. | |||
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining swales shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the swale shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the swale shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored in the swale. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the swale shall be filled. | ||
If used at this site, the following will be applicable: | |||
Check Dams, flow spreaders and dissipaters shall control and distribute flow. | |||
• | Causes for altered water flow or short circuits shall be identified, and obstructions cleared upon discovery. | ||
• | Causes for channelization shall be identified and repaired. | ||
• | Systems shall remain free of sediment build up and debris. | ||
Level Spreaders Operations and Maintenance Plan | |||
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Level Spreaders are used to spread and disperse a concentrated flow thinly over a vegetated or forested riparian buffer or filter strip. Stormwater enters the spreader as a concentrated flow and discharges as sheet flow across a buffer area. All facility components and the vegetated buffer shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Level Spreader shall allow runoff to enter the vegetative filter as predominantly sheet flow. | |||
• | Source of erosion damage shall be identified and controlled when native soil is exposed or erosion channels are forming. | ||
• | Sediment build-up near or exceeding 2 inches in depth shall be removed. | ||
Inlet shall assure unrestricted stormwater flow to the level spreader. | |||
• | Sources of erosion shall be identified and controlled when native soil is exposed or erosion channels are present. | ||
• | Sediment accumulation shall be hand-removed with minimum damage to vegetation using proper erosion control measures. Sediment shall be removed if it is more than 3 inches thick or so thick as to damage or kill vegetation. | ||
• | Inlet shall be cleared when conveyance capacity is plugged. | ||
• | Rock splash pads and dissipaters shall be replenished to prevent erosion. | ||
Spreader lip shall allow water to exit the level spreader as sheet flow. | |||
• | Sources of erosion damage shall be identified and controlled when native soil is exposed or erosion channels are deeper than 2 inches. | ||
• | Outlet shall be cleared when 50 percent of the conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
Vegetated buffer shall be healthy and dense enough (at least 90 percent cover) to provide filtering while protecting underlying soils from erosion. | |||
• | Nuisance and prohibited vegetation (such as blackberries and English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed and replaced. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when vegetation function is impaired. Vegetation shall be replaced immediately to control erosion where soils are exposed and within 3 months to maintain cover density. | ||
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining level spreaders shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the level spreaders shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Obstacles preventing maintenance personnel and/or equipment access to the facility shall be removed. | |||
Insects and Rodents shall not be harbored in the level spreader. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the level spreader shall be filled. | ||
Vegetated Filter Strips Operations and Maintenance Plan | |||
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Vegetated Filter Strips are gently sloped vegetated areas that stormwater runoff is directed to flow and filter through. Stormwater enters the filter as sheet flow from an impervious surface or is converted to sheet flow using a flow spreader. Flow control is achieved using the relatively large surface area and check dams. Pollutants are removed through infiltration and sedimentation. The vegetative filter should drain within 48 hours of storm event. All facility components and vegetation shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Flow Spreader shall allow runoff to enter the vegetative filter as predominantly sheet flow. | |||
• | Source of erosion damage shall be identified and controlled when native soil is exposed or erosion channels are forming. | ||
• | Sediment build-up near or exceeding 2 inch in depth shall be removed. | ||
Filter Inlet shall assure unrestricted stormwater flow to the vegetative filter. | |||
• | Sources of erosion shall be identified and controlled when native soil is exposed or erosion channels are present. | ||
• | Sediment accumulation shall be hand-removed with minimum damage to vegetation using proper erosion control measures, ediment shall be removed if it is more than 2 inches thick or so thick as to damage or kill vegetation. | ||
• | Inlet shall be cleared when conveyance capacity is plugged. | ||
• | Rock splash pads shall be replenished to prevent erosion. | ||
Filter Media shall allow stormwater to percolate uniformly through the vegetative filter. | |||
• | If the vegetative filter does not drain within 48 hours, it shall be re-graded and replanted according to design specifications. Established trees shall not be removed or harmed in this process. | ||
• | Debris in quantities more than 2 inch deep or sufficient to inhibit operation shall be removed routinely (e.g., no less than quarterly), or upon discovery. | ||
Check Dams and Dissipaters shall direct and control flow. | |||
• | Causes for altered water flow and channelization shall be identified, and obstructions cleared upon discovery. | ||
• | Cracks, rot, and structural damage shall be repaired. | ||
Filter Outlet shall allow water to exit the vegetative filter as sheet flow, unless a collection drainpipe is used. | |||
• | Sources of erosion damage shall be identified and controlled when native soil is exposed or erosion channels are deeper than 2 inches. | ||
• | Outlet shall be cleared when 50 percent of the conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
Vegetation shall be healthy and dense enough (at least 90 percent cover) to provide filtering while protecting underlying soils from erosion. | |||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed if build up is damaging vegetation. | ||
• | Nuisance and prohibited vegetation (such as blackberries and English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed and replaced. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when vegetative filter function is impaired. Vegetation shall be replaced immediately to control erosion where soils are exposed and within 3 months to maintain cover density. | ||
Debris and Litter shall be removed to ensure stormwater conveyance and to prevent clogging of inlet and outlet drains and interference with plant growth. | |||
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining vegetated filters shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the vegetative filter shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Obstacles preventing maintenance personnel and/or equipment access to the facility shall be removed. Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | |||
Insects and Rodents shall not be harbored in the vegetated filter. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the vegetated filter shall be filled. | ||
Stormwater Planters Operations and Maintenance Plan | |||
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Stormwater Planters are designed to allow runoff to filter through layers of topsoil (thus capturing pollutants) and then either infiltrate into the native soils (infiltration planter) or be collected in a pipe to be discharged off-site (flow-through planter). The planter is sized to accept runoff and temporarily store the water in a reservoir on top of the soil. The flow-through planter is designed with an impervious bottom or is placed on an impervious surface. Water should drain through the planter within 3-4 hours after a storm event. All facility components and vegetation shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Downspout from rooftop or sheet flow from paving allows unimpeded stormwater flow to the planter. | |||
• | Debris shall be removed routinely (e.g., no less than every 6 months) and upon discovery. | ||
• | Damaged pipe shall be repaired upon discovery. | ||
Splash Blocks prevent splashing against adjacent structures and convey water without disrupting media. | |||
• | Any deficiencies in structure such as cracking, rotting, and failure shall be repaired. | ||
Planter Reservoir receives and detains storm water prior to infiltration. Water should drain from reservoir within 3-4 hours of storm event. | |||
• | Sources of clogging shall be identified and corrected to prevent short circuiting. | ||
• | Topsoil may need to be amended with sand or replaced all together to achieve a satisfactory infiltration rate. | ||
Filter Media consisting of sand, gravel and topsoil shall allow stormwater to percolate uniformly through the planter. The planter shall be excavated and cleaned, and gravel or soil shall be replaced to correct low infiltration rates. | |||
• | Holes that are not consistent with the design and allow water to flow directly through the planter to the ground shall be plugged. | ||
• | Sediment accumulation shall be hand removed with minimum damage to vegetation using proper erosion control measures. Sediment shall be removed if it is more than 4 inches thick or so thick as to damage or kill vegetation. | ||
• | Litter and debris shall be removed routinely (e.g., no less than quarterly) and upon discovery. | ||
Planter shall contain filter media and vegetation. | |||
• | Structural deficiencies in the planter including rot, cracks, and failure shall be repaired. | ||
Overflow Pipe safely conveys flow exceeding reservoir capacity to an approved stormwater receiving system. | |||
• | Overflow pipe shall be cleared of sediment and debris when 50 percent of the conveyance capacity is plugged. | ||
• | Damaged pipe shall be repaired or replaced upon discovery. | ||
Vegetation shall be healthy and dense enough (at least 90 percent cover) to provide filtering while protecting underlying soils from erosion. | |||
• | Mulch shall be replenished at least annually. | ||
• | Vegetation, large shrubs or trees that limit access or interfere with planter operation shall be pruned or removed. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed if build up is damaging vegetation. | ||
• | Nuisance or prohibited vegetation shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed and replaced. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when planter function is impaired. Vegetation shall be replaced within a specific timeframe, e.g., 3 months, or immediately if required to maintain cover density and control erosion where soils are exposed. | ||
Debris and Litter shall be removed to ensure stormwater infiltration and to prevent clogging of overflow drains and interference with plant growth. | |||
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining stormwater planters shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the stormwater planter shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the stormwater planter shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored in the stormwater planter. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the stormwater planter shall be filled and compacted. | ||
Rain Gardens Operations and Maintenance Plan | |||
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A vegetated Infiltration Basin or rain garden is a vegetated depression created by excavation, berms, or small dams to provide for short-term ponding of surface water until it percolates into the soil. The basin shall infiltrate stormwater within 24 hours. All facility components and vegetation shall be inspected for proper operations and structural stability, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Basin Inlet shall assure unrestricted stormwater flow to the vegetated basin. | |||
• | Sources of erosion shall be identified and controlled when native soil is exposed or erosion channels are present. | ||
• | Inlet shall be cleared when conveyance capacity is plugged. | ||
• | Rock splash pads shall be replenished to prevent erosion. | ||
Embankment, Dikes, Berms and Side Slopes retain water in the infiltration basin. | |||
• | Structural deficiencies shall be corrected upon discovery: | ||
○ | Slopes shall be stabilized using appropriate erosion control measures when soil is exposed/flow channels are forming. | ||
○ | Sources of erosion damage shall be identified and controlled. | ||
Overflow or Emergency Spillway conveys flow exceeding reservoir capacity to an approved stormwater receiving system. | |||
• | Overflow shall be cleared when 25 percent of the conveyance capacity is plugged. | ||
• | Sources of erosion damage shall be identified and controlled when soil is exposed. | ||
• | Rocks or other armament shall be replaced when only 1 layer of rock exists. | ||
Filter Media shall allow stormwater to percolate uniformly through the infiltration basin. If water remains 36-48 hours after storm, sources of possible clogging shall be identified and corrected. | |||
• | Basin shall be raked and, if necessary, soil shall be excavated, and cleaned or replaced. | ||
• | Infiltration area shall be protected from compaction during construction. | ||
Sediment/Basin Debris Management shall prevent loss of infiltration basin volume caused by sedimentation. Gauges located at the opposite ends of the basin shall be maintained to monitor sedimentation. | |||
• | Sediment and debris exceeding 3 inch in depth shall be removed every 2-5 years or sooner if performance is affected. | ||
Debris and Litter shall be removed to ensure stormwater infiltration and to prevent clogging of overflow drains and interference with plant growth. | |||
• | Restricted sources of sediment and debris, such as discarded lawn clippings, shall be identified and prevented. | ||
Vegetation shall be healthy and dense enough (at least 90 percent cover) to provide filtering while protecting underlying soils from erosion. | |||
• | Mulch shall be replenished as needed to ensure healthy plant growth | ||
• | Vegetation, large shrubs or trees that limit access or interfere with basin operation shall be pruned or removed. | ||
• | Grass shall be mowed to 4 inches to 9 inches high and grass clippings shall be removed no less than 2 times per year. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed if build up is damaging vegetation. | ||
• | Nuisance or prohibited vegetation (such as blackberries or English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when infiltration basin function is impaired. Vegetation shall be replaced within 3 months, or immediately if required to control erosion. | ||
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining vegetated infiltration basins shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the infiltration basin shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the infiltration basin shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored in the infiltration basin. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but, are not limited to, the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the infiltration basin shall be filled. | ||
If used at this site, the following will be applicable: | |||
Fences shall be maintained to preserve their functionality and appearance. | |||
• | Collapsed fences shall be restored to an upright position. | ||
• | Jagged edges and damaged fences shall be repaired or replaced. | ||
Sand Filters Operations and Maintenance Plan | |||
|---|---|---|---|
Sand filters consist of a layer of sand in a structural box used to trap pollutants. The water filters through the sand and then flows into the surrounding soils or an underdrain system that conveys the filtered stormwater to a discharge point. All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, and 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Filter Inlet shall allow water to uniformly enter the sand filter as calm flow, in a manner that prevents erosion. | |||
• | Inlet shall be cleared of sediment and debris when 40 percent of the conveyance capacity is plugged. | ||
• | Source of erosion damage shall be identified and controlled when native soil is exposed or erosion channels are forming. | ||
• | Sediment accumulation shall be hand-removed with minimum damage to vegetation using proper erosion control measures. Sediment shall be removed if it is more than 4 inches thick or so thick as to damage or kill vegetation. | ||
• | Rock splash pads shall be replenished to prevent erosion. | ||
Reservoir receives and detains stormwater prior to infiltration. If water does not drain within 2-3 hours of storm event, sources of clogging shall be identified and correction action taken. | |||
• | Debris in quantities more than 1 cu ft or sufficient to inhibit operation shall be removed routinely (e.g., no less than quarterly), or upon discovery. | ||
• | Structural deficiencies in the sand filter box including rot, cracks, and failure shall be repaired upon discovery. | ||
Filter Media shall allow to stormwater to infiltrate uniformly through the sand filter. If water remains 36-48 hours after storm, sources of possible clogging shall be identified and corrected. | |||
• | Sand filter shall be raked and if necessary, the sand/gravel shall be excavated, and cleaned or replaced. | ||
• | Sources of restricted sediment or debris (such as discarded lawn clippings) shall be identified and prevented. | ||
• | Debris in quantities sufficient to inhibit operation shall be removed no less than quarterly, or upon discovery. | ||
• | Holes that are not consistent with the design structure and allow water to flow directly through the sand filter to the ground shall be filled. | ||
• | The infiltration area shall be protected from compaction during construction. | ||
Underdrain Piping (where applicable) shall provide drainage from the sand filter, and Cleanouts (where applicable) located on laterals and manifolds shall be free of obstruction, and accessible from the surface. | |||
• | Under-drain piping shall be cleared of sediment and debris when conveyance capacity is plugged. Cleanouts may have been constructed for this purpose. | ||
• | Obstructions shall be removed from cleanouts without disturbing the filter media. | ||
Overflow or Emergency Spillway conveys flow exceeding reservoir capacity to an approved stormwater receiving system. | |||
• | Overflow spillway shall be cleared of sediment and debris when 50 percent of the conveyance capacity is plugged. | ||
• | Source of erosion damage shall be identified and controlled when erosion channels are forming. | ||
• | Rocks or other armament shall be replaced when sand is exposed and eroding from wind or rain. | ||
Vegetation | |||
• | Vegetation, large shrubs or trees that limit access or interfere with sand filter operation shall be pruned. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed. | ||
• | Nuisance or prohibited vegetation (such as blackberries or English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed. | ||
Debris and Litter shall be removed to ensure stormwater infiltration and to prevent clogging. | |||
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining sand filters shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the sand filter shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the facility shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored in the sand filter. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the infiltration basin shall be filled. | ||
Soakage Trenches Operations and Maintenance Plan | |||
|---|---|---|---|
Soakage Trenches consist of drain rock and sand, and receive stormwater from roof downspouts and/or area drains. There are various components within the system - piping, silt basin and the trench itself. The Conveyance Piping consists of an inlet pipe (downspout or area drain), an outlet pipe located between the silt basin and the soakage trench, and a perforated pipe, located on top of the aggregate bed of the soakage trench. The Silt Basin is a structure receiving runoff from an inlet pipe and conveying it to the soakage trench. The silt basin serves as the pre-treatment system for the soakage trench, removing sediments and other debris that can impact its proper functioning. All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, then 2 times per year afterwards, or within 48 hours after each major storm. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Soakage trench infiltration: If water is noticed on top of the trench within 48 hours of a major storm, the soakage trench may be clogged. | |||
• | Check for debris/sediment accumulation, rake and remove and evaluate upland causes (erosion, surface or roof debris, etc. | ||
• | Assess the condition of the aggregate and the filter fabric in the trench. If there is sediment in the aggregate, excavate and replace. | ||
• | If there is a tear in the filter fabric, repair or replace. | ||
• | The soakage trench area shall be protected from compaction during construction. | ||
Conveyance Piping: If water ponds over the trench for more than 48 hours after a major storm and no other cause if identified, it may be necessary to remove the filter fabric to determine if the perforated pipe is clogged with sediment or debris. | |||
• | Any debris or algae growth located on top of the soakage trench should be removed and disposed of properly. | ||
• | If the piping has settled more than 1-inch, add fill material. If there are cracks or releases, replace or repair the pipe. If there are signs of erosion around the pipe, this may be an indication of water seeping due to a crack or break. | ||
Silt Basin: If water remains in the soakage trench for 36-48 hours after storm, check for sediment accumulation in the silt basin | |||
• | If less than 50 percent capacity remains in the basin or 6 inches of sediment has accumulated, remove and dispose the sediment. | ||
Spill Prevention: Virtually all sites, including residential and commercial, present dangers from spills. All homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, nail polish remover, pesticides, and cleaning aids that can adversely affect groundwater if spilled. It is important to exercise caution when handling substances that can contaminate stormwater. | |||
• | Activities that pose the chance of hazardous material spills shall not take place near soakage trenches. | ||
A Shut-Off Valve or Flow-Blocking Mechanism may have been required with the construction of the soakage trench to temporarily prevent stormwater from flowing into it, in the event of an accidental material spill. This may also involve mats kept on site that can be used to cover inlet drains in parking lots. The shut-off valve shall remain in good working order, or if mats or other flow-blocking mechanisms are used, they shall be kept in stock on-site. | |||
Training and/or written guidance information for operating and maintaining soakage trenches shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the soakage trench is required for efficient maintenance. Egress and ingress routes will be maintained to design standards at inspections. | |||
Insects and Rodents shall not be harbored in the soakage trench. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larva ides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the soakage trench shall be filled. | ||
Wet, Extended Wet, and Dry Ponds Operations and Maintenance Plan | |||
|---|---|---|---|
Wet Ponds are constructed ponds with a permanent pool of water. Pollutants are removed from stormwater through gravitational settling and biologic processes. Extended Wet Ponds are constructed ponds with a permanent pool of water and open storage space above for retention or short-term detention of large storm events. Pollutants are removed from stormwater through gravitational settling and biologic processes. Dry Ponds are constructed ponds with temporary storage for the retention or detention of large storm events. The stormwater is stored and released slowly over a matter of hours. All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, and 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Pond Inlet shall assure unrestricted stormwater flow to the wet pond. | |||
• | Inlet pipe shall be cleared when conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
• | Determine if pipe is in good condition: | ||
○ | If more than 1 inch of settlement, add fill material and compact soils. | ||
○ | If alignment is faulty, correct alignment. | ||
○ | If cracks or openings exist indicated by evidence of erosion at leaks, repair or replace pipe as needed. | ||
Forebay traps coarse sediments, reduces incoming velocity, and distributes runoff evenly over the wet pond. A minimum 1-foot freeboard shall be maintained. | |||
• | Sediment buildup exceeding 50 percent of the facility capacity shall be removed every 2-5 years or sooner if performance is being affected. | ||
Embankment, Dikes, Berms and Side Slopes retain water in the wet pond. | |||
• | Slopes shall be stabilized using appropriate erosion control measures when native soil is exposed or erosion channels are forming. | ||
• | Structural deficiencies shall be corrected upon discovery: | ||
○ | If cracks exist, repair or replace structure. | ||
○ | If erosion channels deeper than 2 inches exist, stabilize surface. Sources of erosion damage shall be identified and controlled. | ||
Control Devices (e.g., weirs, baffles, etc.) shall direct and reduce flow velocity. Structural deficiencies shall be corrected upon discovery: | |||
• | If cracks exist, repair or replace structure. | ||
Overflow Structure conveys flow exceeding reservoir capacity to an approved stormwater receiving system. | |||
• | Overflow structure shall be cleared when 50 percent of the conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
• | Sources of erosion damage shall be identified and controlled when native soil is exposed at the top of overflow structure or erosion channels are forming. | ||
• | Rocks or other armoring shall be replaced when only 1 layer of rock exists above native soil. | ||
Sediment and Debris Management shall prevent loss of wet pond volume caused by sedimentation. | |||
• | Wet ponds shall be dredged when 1 foot of sediment accumulates in the pond. | ||
• | Gauges located at the opposite ends of the wet pond shall be maintained to monitor sedimentation. Gauges shall be checked 2 times per year. | ||
• | Sources of restricted sediment or debris, such as discarded lawn clippings, shall be identified and prevented. | ||
• | Debris in quantities sufficient to inhibit operation shall be removed routinely, e.g. no less than quarterly, or upon discovery. | ||
• | Litter shall be removed upon discovery. | ||
Vegetation shall be healthy and dense enough to provide filtering while protecting underlying soils from erosion and minimizing solar exposure of open water areas. | |||
• | Mulch shall be replenished at least annually. | ||
• | Vegetation, large shrubs or trees that limit access or interfere with wet pond operation shall be pruned or removed. | ||
• | Grass (where applicable) shall be mowed to 4 inches to 9 inches high and grass clippings shall be removed if build up is damaging vegetation. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed if build up is damaging vegetation. | ||
• | Nuisance or prohibited vegetation (such as blackberries or English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed and replaced. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when wet pond function is impaired. Vegetation shall be replaced within 3 months, or immediately if required to maintain cover density and control erosion where soils are exposed. If removing a dead or hazard tree a permit may be required, contact the City's Public Works Department for details on tree removal. | ||
• | Vegetation producing foul odors shall be eliminated. | ||
Spill Prevention measures shall be exercised when handling substances that can contaminate stormwater Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining ponds shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the wet pond shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the wet pond shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored in the pond. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the pond shall be filled. | ||
If used at this site, the following will be applicable: | |||
Signage shall clearly convey information. | |||
• | Broken or defaced signs shall be replaced or repaired. | ||
Fences shall be maintained to preserve their functionality and appearance. | |||
• | Collapsed fences shall be restored to an upright position. | ||
• | Jagged edges and damaged fences and shall be repaired or replaced. | ||
Constructed Treatment Wetlands Operations and Maintenance Plan | |||
|---|---|---|---|
Constructed Treatment Wetlands remove pollutants through several processes: sedimentation, filtration, and biological processes. All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, and 2 times per year thereafter, and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Wetland Inlet shall assure unrestricted stormwater flow to the wetland. | |||
• | Inlet pipe shall be cleared when conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
• | Determine if pipe is in good condition: | ||
○ | If more than 1 inch of settlement, add fill material and compact soils. | ||
○ | If alignment is faulty, correct alignment. | ||
○ | If cracks or openings exist indicated by evidence of erosion at leaks, repair or replace pipe as needed. | ||
Forebay traps coarse sediments, reduces incoming velocity, and distributes runoff evenly over the wetland. A minimum 1-foot freeboard shall be maintained. | |||
• | Sediment buildup exceeding 50 percent of the facility capacity shall be removed every 2-5 years or sooner if performance is being affected. | ||
Embankment, Dikes, Berms and Side Slopes retain water in the wetland. | |||
• | Slopes shall be stabilized using appropriate erosion control measures when native soil is exposed or erosion channels are forming. | ||
• | Structural deficiencies shall be corrected upon discovery: | ||
○ | If cracks exist, repair or replace structure. | ||
○ | If erosion channels deeper than 2 inches exist, stabilize surface. Sources of erosion damage shall be identified and controlled. | ||
Control Devices (e.g., weirs, baffles, etc.) shall direct and reduce flow velocity. | |||
• | Structural deficiencies shall be corrected upon discovery: | ||
○ | If cracks exist, repair or replace structure. | ||
Overflow Structure conveys flow exceeding reservoir capacity to an approved stormwater receiving system. | |||
• | Overflow structure shall be cleared when 50 percent of the conveyance capacity is plugged. Sources of sediment and debris shall be identified and corrected. | ||
• | Sources of erosion damage shall be identified and controlled when native soil is exposed at the top of overflow structure or erosion channels are forming. | ||
• | Rocks or other armament shall be replaced when only 1 layer of rock exists above native soil. | ||
Sediment and Debris Management shall prevent loss of wetland volume caused by sedimentation. | |||
• | Wetlands shall be dredged when 1 foot of sediment accumulates. | ||
• | Gauges located at the opposite ends of the wetland shall be maintained to monitor sedimentation. Gauges shall be checked 2 times per year. | ||
• | Sources of restricted sediment or debris, such as discarded lawn clippings, shall be identified and prevented. | ||
• | Debris in quantities sufficient to inhibit operation shall be removed routinely, e.g. no less than quarterly, or upon discovery. | ||
• | Litter shall be removed upon discovery. | ||
Vegetation shall be healthy and dense enough to provide filtering while protecting underlying soils from erosion and minimizing solar exposure of open water areas. | |||
• | Mulch shall be replenished when needed. | ||
• | Vegetation, large shrubs or trees that limit access or interfere with wetland operation shall be pruned. | ||
• | Fallen leaves and debris from deciduous plant foliage shall be raked and removed. | ||
• | Nuisance or prohibited vegetation (such as blackberries or English Ivy) shall be removed when discovered. Invasive vegetation contributing up to 25 percent of vegetation of all species shall be removed and replaced. | ||
• | Dead vegetation shall be removed to maintain less than 10 percent of area coverage or when wetland function is impaired. Vegetation shall be replaced within 3 months, or immediately if required to maintain cover density and control erosion where soils are exposed. | ||
• | Vegetation producing foul odors shall be eliminated. | ||
Spill Prevention measures shall be exercised when handling substances that can contaminate stormwater Releases of pollutants shall be corrected as soon as identified. | |||
Training and/or written guidance information for operating and maintaining treatment wetlands shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the wetland shall be safe and efficient. Egress and ingress routes shall be maintained to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable. | |||
• | Obstacles preventing maintenance personnel and/or equipment access to the wetland shall be removed. | ||
• | Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic. | ||
Insects and Rodents shall not be harbored in the constructed treatment wetland. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off-site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the constructed treatment wetland shall be filled. | ||
If used at this site, the following will be applicable: | |||
Signage shall clearly convey information. | |||
• | Broken or defaced signs shall be replaced or repaired. | ||
Fences shall be maintained to preserve their functionality and appearance. | |||
• | Collapsed fences shall be restored to an upright position. | ||
• | Jagged edges and damaged fences and shall be repaired or replaced. | ||
Underground Detention Tanks, Vaults and Pipes Operations and Maintenance Plan | |||
|---|---|---|---|
Underground Detention Tanks, Vaults, and Pipes are designed to fill with stormwater during large storm events, slowly releasing it over a number of hours. There are numerous components to each system. Drain Inlet Pipes convey stormwater into the detention facility. The Detention Chamber is the structure in which stormwater accumulates during a storm event. Orifice Structure/Outlet Drain Pipe restricts the flow out of the detention chamber, allowing it to fill up and slowly drain out. The orifice structure is located at the downstream end of the detention chamber. Underground facilities shall be inspected quarterly and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Proprietary Structures such as oil-water separators, sedimentation manholes, grit chambers, etc. are required to have an O&M plan submitted with material from the manufacturer for that specific product for the O&M Agreement. | |||
• | If such material is not available or satisfactory for maintenance needs, city staff will assist developer/property owner in preparing the O&M plan. | ||
Drain Inlet Pipes shall be inspected for clogging or leaks where it enters the vault or basin during every inspection and cleanout. | |||
• | Debris/sediment that is found to clog the inlet shall be removed, and disposed of in accordance with applicable federal and state requirements. | ||
Detention Chamber shall be inspected for cracks or damage during each inspection. | |||
• | The detention chamber shall be cleaned out yearly or after an inch of sediment has accumulated. If there is a valve on the outlet pipe it shall be closed otherwise the outlet shall be plugged prior to cleanout. Grit and sediment that has settled to the bottom of the chamber shall be removed during each cleaning. | ||
• | Water and sediment in the detention chamber shall be removed, and disposed of in accordance with regulations. | ||
• | Cleaning shall be done without use of detergents or surfactants. A pressure washer may be used if necessary. | ||
Orifice Structure/Outlet Drain Pipe shall be inspected for clogging during unit inspections/cleanouts. | |||
• | Debris/sediment that is found to clog the inlet shall be removed, and disposed of in accordance with applicable federal and state requirements. | ||
Vegetation such as trees should not be located in or around the detention facility because roots from trees can penetrate the unit body, and leaves from deciduous trees and shrubs can increase the risk of clogging the intake pipe. | |||
• | Large shrubs or trees that are likely to interfere with detention facility operation shall be identified at each inspection then removed. | ||
Source Control measures typically include structural and non-structural controls. Non-structural controls can include street sweeping and other good housekeeping practices. It is often easier to prevent pollutants from entering stormwater than to remove them. | |||
• | Source control measures shall be inspected and maintained (where applicable). | ||
Spill Prevention procedures require high-risk site users to reduce the risk of spills. However, virtually all sites, including residential and commercial, present dangers from spills. Homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, pesticides, and cleaning aids that can adversely affect storm water if spilled. It is important for everyone to exercise caution when handling substances that can contaminate stormwater. Spill prevention procedures shall be implemented in areas where there is likelihood of spills from hazardous materials. | |||
Training and/or written guidance information for operating and maintaining detention facilities shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the detention facility is required for efficient maintenance. Egress and ingress routes shall be open and maintained to design standards. | |||
Signage may serve to educate people about the importance or function of the site's stormwater protection measures. Signs may also discourage behavior that adversely impacts the stormwater protection measures and encourages behavior that enhances or preserves stormwater quality. If debris is a problem, a sign reminding people not to litter may partially solve the problem. Signage (where applicable) will be maintained and repaired as needed during or shortly after inspections. | |||
Insects and Rodents shall not be harbored in the detention facility. Pest control measures shall be taken when insects/rodents are found to be present | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the detention facility shall be filled. | ||
Drywells Operations and Maintenance Plan | |||
|---|---|---|---|
Drywells are designed to infiltrate stormwater into the ground. Stormwater is piped to drywells from roof downspouts or pollution control facilities such as swales or planters. The pollution control facility is designed to settle out sediments and separate oils and greases from the water before releasing it through a pipe to the drywell. This prolongs the life of the drywell and helps to prevent the contamination of soils and groundwater. The drywell is a concrete or plastic manhole section with many small holes in the sides to allow stormwater to infiltrate into the surrounding soil. The drywell system shall be inspected and cleaned quarterly and within 48 hours after each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. Drywells are considered Underground Injection Wells in Oregon and are subject to State regulations for permitting and testing by the Oregon DEQ. The following items shall be inspected and maintained as stated: | |||
Stormwater Drain Pipe shall be inspected for clogging or leaks where it enters the drywell. | |||
• | Debris/sediment that is found to clog the pipe shall be removed and disposed of in accordance with applicable federal and state requirements. | ||
Drywell shall be inspected during each cleanout. Ponding around the catch basins or sedimentation manhole or drywell lids may indicate that the drywell is failing due to siltation, or the clogging of the sediment pores surrounding the drywell. Clogged drywells must be replaced. | |||
Vegetation such as trees should not be located in or around the drywell because roots from trees can penetrate the unit body, and leaves from deciduous trees and shrubs can increase the risk of clogging the intake pipe. | |||
• | Large shrubs or trees that are likely to interfere with operation will be identified at each inspection and removed. | ||
Source Control measures typically include structural and non-structural controls. Non-structural controls can include parking lot or street sweeping and other good housekeeping practices. It is often easier to prevent pollutants from entering stormwater than to remove them. | |||
• | Source control measures shall be inspected and maintained (where applicable). | ||
Spill Prevention procedures require high-risk site users to reduce the risk of spills. However, virtually all sites, including residential and commercial, present dangers from spills. Homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, solvents, pesticides, and cleaning aids that can adversely affect storm water if spilled. It is important to exercise caution when handling substances that can contaminate stormwater. Spill prevention procedures shall be implemented in areas where there is likelihood of spills from hazardous materials. | |||
A Shut-Off Valve or Flow-Blocking Mechanism may have been required with the construction of the drywell to temporarily prevent stormwater from flowing into it, in the event of an accidental material spill. This may also involve mats kept on-site that can be used to cover inlet drains in parking lots. The shutoff valve shall remain in good working order, or if mats or other flow-blocking mechanisms are used, they shall be kept in stock on-site. | |||
Training and/or written guidance information for operating and maintaining drywell systems shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the drywell is required for efficient maintenance. Egress and ingress routes shall be open and maintained to design standards. | |||
• | City inspection staff may require owners to provide proof of registration, permitting and maintenance logs for the facility as required by the Oregon DEQ. | ||
Insects and Rodents shall not be harbored in the drywell. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the drywell shall be filled. | ||
Signage may serve to educate people about the importance or function of the site's stormwater protection measures. Signs may also discourage behavior that adversely impacts the stormwater protection measures and encourages behavior that enhances or preserves stormwater quality. If debris is a problem, a sign reminding people not to litter may partially solve the problem. Signage (where applicable) shall be maintained and repaired as needed during or shortly after inspections. | |||
Spill Control Manholes Operations and Maintenance Plan | |||
|---|---|---|---|
Spill Control Manholes operate using the principal that oil and water are immiscible (do not mix) and have different densities. Oil, being less dense than water, floats to the surface. The spill control manhole shall be inspected and cleaned quarterly. The facility owner must keep a log, recording all inspection dates, observations, and maintenance activities. The following items shall be inspected and maintained as stated: | |||
Stormwater Drain Inlet Pipe shall be inspected for clogging or leaks where it enters the manhole during every inspection and cleanout. Debris/sediment that is found to clog the inlet shall be removed, tested, and disposed of in accordance with applicable federal and state requirements. | |||
Manhole Chamber shall be inspected for cracks or damage during each inspection. | |||
• | The manhole shall be cleaned out quarterly. Cleanout shall be done in a manner to minimize the amount of trapped oil entering the outlet pipe. If there is a valve on the outlet pipe it shall be closed otherwise the outlet will be plugged prior to clean-out. | ||
• | Water and oil shall be removed, tested, and disposed of in accordance with regulations. Grit and sediment that has settled to the bottom of the chamber shall be removed during each cleaning | ||
• | Cleaning shall be done without use of detergents or surfactants. A pressure washer along with a vacuum may be used if necessary. | ||
Absorbent Pillows and Pads (where applicable) absorb oil from the separation chamber. | |||
• | Replacement shall occur at least twice a year, in the spring and fall, or as necessary to retain oil-absorbing function. | ||
Stormwater Drain Outlet Pipe shall be inspected for clogging or leaks where it exits the manhole. Particular attention shall be paid to ensure that the joint where the tee joins the outlet pipe is watertight. | |||
• | Debris/sediment that is found to clog the outlet shall be removed, tested, and disposed of in accordance with applicable federal and state requirements. | ||
Vegetation such as trees should not be located in or around the spill control manhole because roots can penetrate the unit body, and leaves from deciduous trees and shrubs can increase the risk of clogging. | |||
• | Large shrubs or trees that are likely to interfere with manhole operation shall be identified at each inspection and removed. | ||
Source Control measures typically include structural and non-structural controls. Non-structural controls can include street sweeping and other good housekeeping practices. | |||
• | Source control measures shall be inspected and maintained. | ||
Spill Prevention procedures require high-risk site users to reduce the risk of spills. However, virtually all sites, including residential and commercial, present dangers from spills. Homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, pesticides, and cleaning aids that can adversely affect storm water if spilled. It is important to exercise caution when handling substances that can contaminate stormwater. Spill prevention procedures shall be implemented in areas where there is likelihood of spills from hazardous materials. | |||
Training and/or written guidance information for operating and maintaining spill control manholes shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to all property owners and tenants. | |||
Access to the spill control manhole is required for efficient maintenance. Egress and ingress routes shall be open and maintained to design standards. | |||
Insects and Rodents shall not be harbored in the spill control manhole. Pest control measures shall be taken when insects/rodents are found to be present. | |||
• | If a complaint is received or an inspection reveals that a stormwater facility is significantly infested with mosquitoes or other vectors, the property owner/owners or their designee may be required to eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted by using first non-chemical methods and secondly, only those chemical methods specifically approved by the City's inspector. Acceptable methods include but are not limited to the following: | ||
i. | Installation of predacious bird or bat nesting boxes. | ||
ii. | Alterations of pond water levels approximately every 4 days in order to disrupt mosquito larval development cycles. | ||
iii. | Stocking ponds and other permanent water facilities with fish or other predatory species. | ||
iv. | If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other approved larvicides. These materials may only be used with City inspector approval if evidence can be provided that these materials will not migrate off site or enter the public stormwater system. Chemical larvicides shall be applied by a licensed individual or contractor. | ||
• | Holes in the ground located in and around the manhole shall be filled. | ||
Signage may serve to educate people about the importance or function of the site's stormwater protection measures. Signage (where applicable) shall be maintained and repaired as needed during or shortly after inspections. | |||
A Facility Planting Zones.
Zone A: Area of the facility defined as the bottom of the facility to the designated high-water mark. This area has wet to moist soils and plants located here shall be tolerant of mild inundation.
Zone B: Area of the facility defined as the side slopes from the designated high-water mark up to the edge of the facility. This area typically has drier to moist soils with the moist soils being located farther down the side slopes. Plants here should be drought tolerant and help stabilize the slopes.
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B Facility Plant List.
Note: Alternative plants not found on this list may be approved based on ease of maintenance and beneficial impacts to water and soil quality. Non-native invasive plants are not allowed. Only native plants are allowed in stormwater facilities within Natural Resource Protection Area setbacks (SDC 4.3-117.F.4). Each stormwater facility must have a minimum of 3 unique species.
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A Approved Street Tree List.
Street Trees for Under Powerlines | |
|---|---|
Botanical Name | Common Name |
Acer ginnala | Amur Maple |
Acer Grandidentatum | Bigtooth Maple |
Acer tartaricum | Tartarian Maple |
Acer truncatum | Shantung Maple |
Amelanchier arborea | Shadbush |
Amelanchier x grandiflora 'var.' | 'Autumn Brilliance' Serviceberry |
Amelanchier x grandiflora 'var.' | 'Robin Hill' Serviceberry |
Amelanchier leavis | Smooth Shadbush, Smooth Serviceberry |
Arbus unedo | Strawberry Tree |
Carpinus Caroliana | American Hornbeam |
Cercis | Redbud most varieties |
Clerodendrum trichotomum | Glorybower Tree |
Cornus florida | Flowering Dogwood |
Cornus kousa | Korean Dogwood |
Syringa reticulata 'var.' | 'Summer Snow' Japanese Tree Lilac |
Street Trees for Parking Strips 4 Feet to 6 Feet Wide | |
|---|---|
Botanical Name | Common Name |
Acer campestre | Hedge Maple |
Acer campestre 'var.' | 'Queen Elizabeth' Hedge Maple |
Acer cappadocicum | Coliseum Maple |
Acer grandidentatum | Bigtooth Maple |
Acer griseum | Paperbark Maple |
Acer platanoides 'var.' | 'Olmsted' Norway Maple |
Acer rubrum | Red Maple |
Acer rubrum 'Armstrong' | 'Armstrong' Red Maple |
Acer rubrum 'var.' | 'Autumn Flame' Red Maple |
Acer rubrum 'var.' | 'Bowhall' Red Maple |
Acer rubrum 'var.' | 'Karpick' Red Maple |
Acer rubrum 'var.' | 'October Glory' Red Maple |
Acer rubrum 'var.' | 'Red Sunset' Red Maple |
Acer x freemanii 'var.' | 'Armstrong II' Maple |
Acer x freemanii 'var.' | 'Autumn Blaze' Maple |
Acer x freemanii 'var.' | 'Autumn Fantasy' Maple |
Acer x freemanii 'var.' | 'Scarlet Sentinel' Maple |
Aesculus x carnea 'var.' | 'Briotti' Red Horsechestnut |
Aesculus x carnea 'var.' | 'Ft. McNair' Red Horsechestnut |
Amelanchier x grandiflora | Serviceberry |
Amelanchier x grandiflora 'var.' | 'Cumulus' Serviceberry |
Betula jacquemontii | Jacquemontii Birch |
Carpinus betulus 'var.' | 'Fastigiate' European Hornbeam |
Carpinus carolinia | American Hornbeam |
Celtis laevigata 'var.,' | 'All Seasons' Sugar Hackberry |
Celtis occidentalis | Hackberry |
Celtis occidentalis 'var.' | 'Chicagoland' Hackberry |
Celtis occidentalis 'var.' | 'Prairie Pride' Hackberry |
Cercidiphyllum japonica | Katsura |
Cercis canadensis | Redbud |
Chionanthus virginicus | Fringe Tree |
Chitalpa tashkentensis | Chitalpa |
Cornus nuttallii | Pacific Dogwood |
Koelreuteria paniculata | Goldenrain Tree |
Ostrya virginiana | American Hop Hornbeam |
Parrotia persica | Persian Parrotia |
Street Trees for Parking Strips 6 Feet to 8 Feet Wide | |
|---|---|
Botanical Name | Common Name |
Acer campestre | Hedge Maple |
Acer campestre 'var.' | 'Queen Elizabeth' Hedge Maple |
Acer cappadocicum | Coliseum Maple |
Acer rubrum | Red Maple |
Acer rubrum 'var.' | 'Autumn Flame' Red Maple |
Acer rubrum 'var.' | 'Bowhall' Red Maple |
Acer rubrum 'var.' | 'Karpick' Red Maple |
Acer rubrum 'var.' | 'October Glory' Red Maple |
Acer rubrum 'var.' | 'Red Sunset' Red Maple |
Acer saccharum | Sugar Maple |
Acer saccharum 'var.' | 'Legacy' Sugar Maple |
Acer saccharum 'var.' | 'Bonfire' Sugar Maple |
Acer saccharum 'var.' | 'Commemoration' Sugar Maple |
Acer saccharum 'var.' | 'Green Mountain' Sugar Maple |
Acer saccharum 'var.' | 'Seneca Chief' Sugar Maple |
Acer truncatum x 'var.' | 'Norwegian Sunset' Maple |
Acer truncatum x 'var.' | 'Pacific Sunset' Maple |
Acer x freemanii 'var.' | 'Autumn Blaze' Maple |
Acer x freemanii 'var.' | 'Autumn Fantasy' Maple |
Acer x freemanii 'var.' | 'Celebration' Maple |
Acer x freemanii 'var.' | 'Scarlet Sentinel' Maple |
Aesculus hippocastanum 'var.' | 'Bauman' Horsechestnut |
Aesculus x carnea 'var.' | 'Briotti' Red Horsechestnut |
Aesculus x carnea 'var.' | 'Ft. McNair' Red Horsechestnut |
Castenea Dentata | Blight Resistant Chestnut |
Carpinus betulus | European Hornbeam |
Carpinus betulus 'var.' | 'Fastigiate' European Hornbeam |
Carpinus carolinia | American Hornbeam |
Celtis laevigata 'var.,' | 'All Seasons' Sugar Hackberry |
Celtis occidentalis | Hackberry |
Celtis occidentalis 'var.' | 'Chicagoland' Hackberry |
Celtis occidentalis 'var.' | 'Prairie Pride' Hackberry |
Ginkgo biloba | Ginkgo Male Only |
Ginkgo biloba 'var.' | 'Autumn Gold' Ginkgo Male only |
Ginkgo biloba 'var.' | 'Lakeview' Ginkgo Male only |
Ginkgo biloba 'var.' | 'Magyar' Ginkgo male only |
Halesia carolina | Carolina Silverbell |
Halesia monticola | Mountain Silverbell |
Koelreuteria paniculata | Goldenrain Tree |
Ostrya virginiana | American Hop Hornbeam |
Quercus robur | English Oak |
Quercus robur 'var.' | 'Skymaster' English Oak |
Quercus rubra | Northern Red Oak |
Quercus garryana | Oregon White Oak |
Quercus shumardii | Shumard Oak |
Sophora japonica | Scholartree |
Sophora japonica 'var.' | 'Princeton Upright' Scholartree |
Sophora japonica 'var.' | 'Regent' Scholartree |
Umbellularia californica | Oregon Myrtle |
Zelkova serrata | Japanese Zelkova |
Zelkova serrata 'var.' | 'Green Vase' Japanese Zelkova |
Zelkova serrata 'var.' | 'Halka' Japanese Zelkova |
Zelkova serrata 'var.' | 'Village Green' Japanese Zelkova |
Street Trees for Parking Strips 10 Feet Wide and Larger | |
|---|---|
Botanical Name | Common Name |
Acer macrophyllum | Bigleaf Maple |
Acer nigrum | Black Maple |
Acer pseudoplatanus | Sycamore Maple |
Acer pseudoplatanus 'var.' | 'Lustre' Sycamore Maple |
Acer pseudoplatanus 'var.' | 'Spaethii' Sycamore Maple |
Acer saccharum | Sugar Maple |
Acer saccharum 'var.' | 'Legacy' Sugar Maple |
Acer saccharum 'var.' | 'Bonfire' Sugar Maple |
Acer saccharum 'var.' | 'Commemoration' Sugar Maple |
Acer saccharum 'var.' | 'Green Mountain' Sugar Maple |
Acer saccharum 'var.' | 'Seneca Chief' Sugar Maple |
Aesculus hippocastanum 'var.' | 'Bauman' Horsechestnut |
Castenea dentata | Blight Resistant Chestnut |
Carpinus betulus | European Hornbeam |
Celtis laevigata | Sugar Hackberry |
Cladrastis lutea | Yellowwood |
Eucommia ulmoides | Hardy Rubber Tree |
Ginkgo biloba | Ginkgo male only |
Ginkgo biloba 'var.' | 'Autumn Gold' Ginkgo male only |
Ginkgo biloba 'var.' | 'Lakeview' Ginkgo male only |
Ginkgo biloba 'var.' | 'Magyar' Ginkgo male only |
Ginkgo biloba 'var.' | 'Princeton Sentry' Ginkgo male only |
Gymnocladus dioicus | Kentucky Coffeetree |
Gymnoclaudus dioicus 'var.' | 'Expresso' Kentucky Coffeetree |
Halesia carolina | Carolina Silverbell |
Liriodendron tulipifera | Tulip Tree |
Lithocarpus densiflorus | Tanbark Oak |
Magnolia grandiflora | Southern Magnolia |
Nyssa sylvatica | Blackgum |
Quercus bicolor | Swamp White Oak |
Quercus coccinea | Scarlet Oak |
Quercus douglassi | Blue Oak |
Quercus lobata | Valley Oak |
Quercus frainetto 'var.' | 'Forest Green' Hungarian Oak |
Quercus macrocarpa | Bur Oak |
Quercus phellos | Willow Oak |
Quercus robur | English Oak |
Quercus robur 'var.' | 'Skymaster' English Oak |
Quercus rubra | Northern Red Oak |
Quercus shumardii | Shumard Oak |
Sophora japonica | Scholartree |
Sophora japonica 'var.' | 'Princeton Upright' Scholartree |
Sophora japonica 'var.' | 'Regent' Scholartree |
Tilia americana | American Linden |
Tilia americana 'var,' | 'Redmond' American Linden |
Tilia americana 'var.' | 'Legend' American Linden |
Tilia tomentosa | Silver Linden |
Tilia platyphyllos | Bigleaf Linden |
Tilia x euchlora | Crimean Linden |
Ulmus accolade | Accolade Elm Dutch elm disease tolerant only |
Ulmus parvifolia | Chinese Elm Dutch elm disease tolerant only |
Umbellularia californica | Oregon Myrtle |
Zelkova serrata | Japanese Zelkova |
Zelkova serrata 'var.' | 'Green Vase' Japanese Zelkova |
Zelkova serrata 'var.' | 'Halka' Japanese Zelkova |
Zelkova serrata 'var.' | 'Village Green' Japanese Zelkova |
A Overview.
1.
Some site characteristics and uses may generate specific pollutants that are not addressed solely through implementation of the stormwater quality measures identified in SDC 4.3.110. The site characteristics and uses in this chapter have been identified as potential sources for chronic loadings or acute releases of pollutants such as oil and grease, toxic hydrocarbons, heavy metals, toxic compounds, solvents, abnormal pH levels, nutrients, organics, bacteria, chemicals, and suspended solids. This appendix presents source controls for managing these pollutants at their source.
2.
Industrial facilities may be subject to additional requirements through State of Oregon issued NPDES permits or as outlined in Oregon Administrative Rules (OAR) 340 Division 041.
3.
Springfield Municipal Code 4.372 lists prohibited discharges to the City's storm sewer system. The City has used these standards in the development of the listed source controls so stormwater discharges can better meet these criteria. The implementation of this chapter is in addition to the applicable water quality, flow control, and flood control requirements.
4.
Applicants may propose alternatives to the source controls identified in this chapter. Proposal of an alternative source control or alternative design element will require an additional review process and may delay issuance of related building or public works permits.
B Site Uses and Characteristics That Trigger Source Controls.
1.
As provided in SDC 4.3.110(C)(8), development that includes any of the following uses and characteristics are subject to the design methodologies of this chapter:
a.
Fuel Dispensing Facilities and Surrounding Traffic Areas (Section C)
b.
Above-Ground Storage of Liquid Materials (Section D)
c.
Solid Waste Storage Areas, Containers, and Trash Compactors (Section E)
d.
Outdoor Storage of Bulk Materials (Section F)
e.
Material Transfer Areas/Loading Docks (Section G)
f.
Equipment and/or Vehicle Washing Facilities (Section H)
g.
Covered Vehicle Parking Areas (Section I)
Applicants are required to address all of the site characteristics and uses listed in Sections (C) through (I). For example, if a development includes both a fuel dispensing area and a vehicle washing facility, the source controls in both Sections (C) and (H) will apply. |
2.
Source Control Goals and Objectives.
a.
The specific source control standards are based on the following goals and objectives:
i.
Prevent stormwater pollution by eliminating pathways that may introduce pollutants into stormwater.
ii.
Protect soil, groundwater and surface water by capturing acute releases and reducing chronic contamination of the environment.
iii.
Direct wastewater discharges (including wash water) to a sanitary sewer system.
iv.
Direct areas that have the potential for acute releases or accidental spills, and are not expected to regularly receive flow or require water use (such as covered fuel islands or covered containment areas), to an approved method of containment or destination.
v.
Safely contain spills on site, avoiding preventable discharges to sanitary sewer facilities, surface water bodies, or underground injection control structures (UICs).
vi.
Emphasize structural controls over operational procedures. Structural controls are not operator dependent and are considered to provide more permanent and reliable source control. Any proposals for operation-based source controls need to describe the long-term viability of the maintenance program.
3.
Signage.
a.
Informational signage is required for certain site uses and activities that may pollute stormwater. Signage addresses good housekeeping rules and provides emergency response measures in case of an accidental spill. Required spill response supplies must be clearly marked, located where the signage is posted (or the location of the supplies must be clearly indicated by the signage), and must be located near the high-risk activity area. Required spill response supplies, such as absorbent material and protective clothing, should be available at all potential spill areas. Employees must be familiar with the site's operations and maintenance plan and proper spill cleanup procedures.
b.
All signage must conform to the standards described below. Additional signage for specific activities is noted in applicable Sections C through I.
c.
Signs must be 8.5 inches x 11 inches or larger and located and plainly visible from all activity areas. More than 1 sign may be needed to accommodate larger activity areas. Signs must be water-resistant and include the following information:
C Fuel Dispensing Facilities.
1.
Fuel dispensing facilities include areas where fuel is transferred from bulk storage tanks to vehicles, equipment, and/or mobile containers (including fuel islands, above ground fuel tanks, fuel pumps, and the surrounding pad). This applies to large-sized gas stations as well as single-pump fueling operations.
2.
Cover.
a.
The fuel dispensing area must be covered with a permanent canopy, roof, or awning so precipitation cannot come in contact with the fueling activity areas. Rainfall must be directed from the cover to an approved stormwater destination.
b.
Covers 10 feet high or less must have a minimum overhang of 3 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated fueling activity area/pad it is to cover.
c.
Covers higher than 10 feet must have a minimum overhang of 5 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated fueling activity area/pad it is to cover.
3.
Pavement.
a.
A paved fueling pad must be placed under and around the fueling activity area with asphalt or concrete and must meet all applicable building code requirements.
b.
Sizing of the paved areas must be adequate to cover the activity area, including placement and number of the vehicles or pieces of equipment to be fueled by each pump.
c.
Fuel pumps must be located a minimum of 7 feet from the edge of the fueling pad.
4.
Drainage.
a.
The paved area beneath the cover must be hydraulically isolated through grading, berms, or drains. This will prevent uncontaminated stormwater from running onto the area and carrying pollutants away.
b.
Drainage from the hydraulically isolated area must be directed to an approved City sanitary sewer system, or authorized pretreatment facility.
c.
Surrounding runoff must be directed away from the hydraulically isolated fueling pad to a stormwater destination that meet all stormwater management practices of the Springfield Development Code and other applicable code requirements.
6.
Spill Control Manhole.
a.
A spill control manhole must be installed on the discharge line of the fueling pad (before the domestic waste line tie-in).
b.
The tee section must extend 18 inches below the outlet elevation, with an additional 3 feet of dead storage volume below the tee to provide storage for oil and grease.
c.
The total containment volume must be no less than 110 percent the volume of the largest container or 10 percent of the total volume of product stored, whichever is larger.
d.
The manhole must be located on private property.
7.
Shut-Off Valves.
a.
Shut-off valves are required to protect the City sewer systems or on-site infiltration facilities of spill risks from chemicals and other constituents that provide a danger for wide spread contamination, system damages or risk to the public health. Manual shut-off valves must not be permitted unless a request for an adjustment is approved by the City.
b.
Shut-off valves will be required in the following situations:
i.
Site or activity areas where corrosives or oxidizers are used or stored (for example, concentrated acids are corrosives having a pH of less than or equal to 5.0 and bases such as sodium or ammonium hydroxide having a pH of greater than or equal to 12.0, common oxidizers are hydrogen peroxide and bleach); or
ii.
Substances which are water soluble or float on water; or
iii.
Solvents and petroleum products.
c.
Traffic pathways that surround the fueling pad, also designated as high-use/high-risk areas, will require a shut-off valve on the storm drainage system.
i.
Valves installed on storm drainage systems must be installed downstream of all private stormwater quality facilities to accommodate spill containment.
ii.
These valves should be left open to facilitate stormwater flows during normal conditions, and immediately closed in the event of a spill.
iii.
The switch or handle to operate the shut-off valve must be clearly marked and accessible, and identified on the signage at the fuel dispensing area. In the event of a spill the valve must remain closed until all spilled fuel and residue has been properly removed and disposed of.
d.
Fueling pads will require a shut-off valve downstream of the spill control manhole.
i.
Valves installed on sanitary sewer systems must be installed before the domestic waste line tie-in.
ii.
These valves must automatically revert to the closed position.
iii.
These valves must be kept closed, and opened only to allow incidental drainage activities that do not pose to be a threat or risk to the destination system.
e.
Shut-off valves must be located on private property and downstream of the exposed area's collection system.
i.
All valves must be installed and maintained as per manufacturer's recommendations. For more information about shut-off valves and associated valve boxes, contact Building and Permit Services at 541-682-5086.
8.
Additional Requirements.
a.
Installation, alteration, or removal of above-ground fuel tanks larger than 55 gallons, and any related equipment, are subject to additional permitting requirements by the Springfield-Eugene Fire Marshal's Office. For technical questions and permitting, call the Fire Marshal's Office Permit Center at 541-682-5411, or visit them at Permit and Information Center, 99 W. 10th Avenue, Eugene, OR 97401.
b.
Bulk fuel terminals, also known as tank farms, will require the following:
i.
Secondary containment equal to 110 percent of the product's largest container or 10 percent of the total volume of product stored, whichever is larger.
ii.
A separate containment area for all valves, pumps and coupling areas with sub-bermed areas either in front of or inside the main containment areas. These sub-bermed areas are required to have rain shields and be directed to a City sanitary sewer destination that meets all applicable code requirements if no City sanitary sewer facility is available, drainage must be directed to a temporary holding facility for proper disposal.
iii.
An impervious floor within all containment areas. Floors must be sealed to prevent spills from contaminating the groundwater.
iv.
Truck loading and off-loading areas. These areas must follow cover, pavement, drainage, spill control, and shut-off valve requirements identified for fuel dispensing facilities.
v.
Shut-off valves installed for the drainage of the tank yard, must be installed downstream of the drainage system of the primary containment area, and kept closed. Valves installed for the drainage of the truck pad and sub-bermed containment areas must be installed on the sanitary sewer line downstream of the spill control manhole.
vi.
A batch discharge authorization before draining a containment area. This authorization will determine appropriate disposal methods, identify pretreatment requirements (if applicable), and authorize the discharge. Pretreatment may be required for oil and grease removal, and testing may be required to establish the specific characteristics of the discharge.
c.
Underground fuel tanks less than 4,000 gallons in size are subject to additional permitting requirements by Oregon's Department of Environmental Quality (DEQ) and tanks larger than 4,000 gallons are referred to the Federal Environmental Protection Agency (EPA). For technical questions and permitting, call DEQ's NW Region main office at 1-800-844-8467 and ask for the Underground Storage Tank Permitting Department.
D Above-Ground Storage of Liquid Materials.
1.
Above-ground storage of liquid materials include places where exterior storage (either permanent or temporary) of liquid chemicals, food products, waste oils, solvents, or petroleum products in above-ground containers, in quantities of 50 gallons or more exist.
2.
Containment.
a.
Liquid materials must be stored and contained in such a manner that if the container(s) is ruptured, the contents will not discharge, flow, or be washed into a receiving system.
b.
A containment device and/or structure for accidental spills must have enough capacity to capture a minimum of 110 percent of the product's largest container or 10 percent of the total volume of product stored, whichever is larger. Containers, such as double-walled containers, with internal protection are considered to meet this requirement.
3.
Cover.
a.
Storage containers (other than tanks) must be completely covered to prevent stormwater contact. Runoff must be directed from the cover to a stormwater destination that meets all applicable code requirements.
b.
Covers 10 feet high or less must have a minimum overhang of 3 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated activity area.
c.
Covers higher than 10 feet must have a minimum overhang of 5 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated activity area.
4.
Pavement.
a.
All above ground storage of liquid material must occur in paved areas. The storage area must be paved with asphalt or concrete and must meet all applicable building code requirements. Sizing of the paved areas must be adequate to cover the area intended for storage.
5.
Drainage.
a.
All paved storage areas must be hydraulically isolated through grading, berms, or drains to prevent uncontaminated stormwater run-on to a storage area.
b.
Covered storage areas:
i.
Significant amounts of precipitation are not expected to accumulate in covered storage areas, and drainage facilities are not required for the contained area beneath the cover.
ii.
If the applicant elects to install drainage facilities, the drainage from the hydraulically isolated area must be directed to a sanitary sewer destination that meets all applicable code criteria.
c.
Uncovered storage areas with containment:
i.
Water will accumulate in uncovered storage areas during and after rain. Any contaminated water cannot simply be drained from the area. It must be collected, inspected, and tested at the expense of the property owner before proper disposal can be determined.
ii.
Some type of monitoring may also be needed to determine the characteristics and level of contamination of the stormwater.
d.
All discharges to the sanitary sewer system must be considered batch discharges and must require approval and meet applicable code requirements.
i.
Pretreatment requirements must be set as part of the discharge approval process, based on the types and quantities of material to be discharged.
ii.
A discharge evaluation must be performed before connection to a sanitary sewer facility.
iii.
Testing may be required to establish characteristics of the sanitary sewer or contaminated stormwater and to verify that local discharge limits are not exceeded. MWMC illicit discharge staff can be contacted to start this process.
E Solid Waste Storage.
1.
Solid waste storage areas, containers, and trash compactors include outdoor areas with 1 or more facilities that store solid waste (both food and non-food waste) containers.
a.
One- and two-family residential solid waste storage areas, containers, and trash compactors are exempt from this code subsection.
b.
Solid waste includes both food and non-food waste or recycling. Solid waste containers include compactors, dumpsters, compost bins, grease bins, recycling areas, and garbage cans.
c.
Debris collection areas used only for the storage of wood pallets or cardboard is excluded from these requirements.
d.
The following site uses and activities include all commercial and industrial development with facilities that store solid wastes, both food and non-food.
i.
Outdoor solid waste storage areas.
ii.
Multifamily residential sites if a shared trash collection area is proposed.
iii.
Activity areas used to collect and store refuse or recyclable materials, such as can or bottle return stations and debris collection areas.
iv.
Facilities whose business is to process and/or recycle wood pallets or cardboard.
2.
Design.
a.
For approval of solid waste storage and handling activity areas in the City of Springfield, the following design requirements will apply. See below for a clarification of each requirement:
Activity/Use | Requirements | |||
|---|---|---|---|---|
Cover | Pavement | Hydraulicly Isolated | Sanitary Sewer Drain | |
Multi Residential (with shared trash areas) | X | X | X | X |
Commercial | X | X | X | X |
Industrial | X | X | X | X |
Compactors (regardless of use) | X | X | X | X |
Can and Bottle Return Stations | X | X | X | X |
3.
Cover.
a.
A permanent canopy, roof, or awning must be provided to cover the solid waste storage activity area and must be constructed to cover the activity area so rainfall cannot come in contact with the waste materials being stored. The cover must be sized relative to the perimeter of the hydraulically isolated activity area it is to cover. Runoff must be directed from the cover to a stormwater destination that meets all applicable code requirements.
F Outdoor Storage of Bulk Materials.
Any bulk materials storage location that is not completely enclosed by a roof and sidewalls is an outdoor storage area.
1.
Bulk Materials Categories.
a.
Bulk materials are separated into 3 categories based on risk assessments for each material stored: high-risk, low-risk, and exempt.
High-Risk Materials | Low-Risk Materials | Exempt Materials |
|---|---|---|
• Recycling materials with potential effluent • Corrosive materials (e.g. lead-acid batteries) • Storage and processing of food items • Chalk/gypsum products • Feedstock/grain • Material by-products with potential effluent • Asphalt • Fertilizer • Pesticides • Lime/lye/soda ash • Animal/human wastes • Treated Lumber | • Recycling materials without potential effluent • Scrap or salvage goods • Metal • Sawdust/bark chips • Sand/dirt/soil (including contaminated soil piles) • Material by-products without potential effluent • Unwashed gravel/rock • Composting Operations | • Washed gravel/rock • Finished lumber • Plastic products (hoses, gaskets, pipe, etc.) • Clean concrete products (blocks, pipe, etc.) • Glass products (new, non-recycled) |
2.
Cover.
a.
Low-risk materials must be covered with a temporary plastic film or sheeting at a minimum.
b.
High-risk materials are required to be permanently covered with a canopy or roof to prevent stormwater contact and minimize the quantity of rainfall entering the storage area. Runoff must be directed from the cover to a stormwater destination that meets all applicable code requirements.
c.
Covers 10 feet high or less must have a minimum overhang of 3 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated activity area.
d.
Covers higher than 10 feet must have a minimum overhang of 5 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated activity area.
4.
Drainage.
a.
Low-risk material storage areas are allowed in areas served by standard stormwater management systems. However, all erodible materials being stored must be protected from rainfall.
b.
If materials are erodible, a structural containment barrier must be placed on at least 3 sides of every stockpile to act as a barrier to prevent uncontaminated stormwater from running onto the storage area and carrying pollutants away.
c.
For high-risk material storage areas, the paved area beneath the structural cover must be hydraulically isolated through grading, structural containment berms or walls, or perimeter drains to prevent runoff.
i.
Significant amounts of precipitation are not expected to accumulate in covered storage areas, and drainage facilities are not required for the containment area beneath the cover.
ii.
If the applicant elects to install drainage facilities, the drainage from the hydraulically isolated area must be directed to the City's sanitary sewer (with approval from the MWMC Illicit discharge division) and must meet all applicable code criteria.
5.
Additional Requirements.
a.
Storage of pesticides and fertilizers may need to comply with specific regulations outlined by the Oregon Department of Environmental Quality (DEQ). For answers to technical questions, call DEQ's NW Region main office at 1-800-844-8467.
b.
A sampling manhole or other suitable stormwater monitoring access point may be required to monitor stormwater runoff from the storage area. This may apply to certain types of storage activities and materials or if an alternative source control is proposed. This requirement complies with Springfield Development Code 4.3.110D, which requires discharge to be treated. PW staff will review for applicability of this requirement.
c.
Signage must be provided at the storage area if hazardous materials or other materials of concern are stored. Signage must be located so it is plainly visible from all storage activity areas. More than 1 sign may be needed to accommodate large storage areas.
d.
If the applicant elects to install drainage facilities to the City's sanitary sewer system, a shut-off valve must be required for the structurally covered storage area.
6.
Alternative Protection Measures.
a.
In lieu of covering mineral resource mining, recovery, stockpiling, and processing operations and low-risk material storage areas receiving land use approval, the applicant may propose alternative protection measures that demonstrate that stormwater runoff from the site will not contaminate adjoining properties, surface waters, and ground water as part of their land use application.
G Material Transfer Areas/Loading Docs.
1.
Material transfer areas/loading docks include areas that are either interior or exterior to a building, designed to accommodate a commercial truck/trailer being backed up to or into them, and used specifically to receive or distribute materials to and/or from commercial trucks/trailers. Includes loading/unloading facilities with docks, and large bay doors without docks.
a.
These requirements also apply to all development proposing the installation of new material transfer areas or structural alterations to existing material transfer areas (e.g., access ramp regrading, leveler installations) with the following characteristics:
c.
The requirements in this section do not apply to material transfer areas or loading docks used only for mid-sized to small-sized passenger vehicles and areas restricted by lease agreements or other regulatory requirements to storing, transporting or using materials that are classified as domestic use, for example, primary educational facilities (elementary, middle or high schools), or buildings used for temporary storage, and churches.
2.
Cover.
a.
The hydraulically isolated areas in front of loading docks are required to be permanently covered with a canopy or roof to prevent stormwater contact and to minimize the quantity of rainfall entering the loading dock area. Runoff must be directed from the cover to a stormwater destination that meets all applicable code requirements.
b.
Covers 10 feet high or less must have a minimum overhang of 3 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated activity area.
c.
Covers higher than 10 feet must have a minimum overhang of 5 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated activity area.
3.
Pavement.
a.
A paved material transfer area must be placed underneath and around the loading and unloading activity area with asphalt or concrete that meets all applicable building code requirements. This will reduce the potential for soil contamination with potential impacts on groundwater and will help control any acute or chronic release of materials present in these areas.
4.
Drainage.
a.
Loading Docks:
i.
Drainage from the hydraulically isolated area must be directed to a sanitary sewer that meets all applicable code requirements. Surrounding runoff and drainage from the access ramp must be directed away from the hydraulically isolated area to a stormwater destination that meets all applicable requirements of the Springfield Development Code.
ii.
The requirement for the drainage from the hydraulically isolated area of the loading dock to be directed to the City's sanitary sewer, or authorized pretreatment facility may be waived if PW determines there is no gravity sanitary sewer service available and an appropriately sized, underground temporary storage structure (such as a catch basin with no outlet or dead-end sump) is provided.
5.
Non-Gravity Option.
a.
Activity areas that cannot achieve gravity sanitary sewer service may be allowed to install a pressurized (pumped) system. These types of installations will require the following to be provided at the time of building permit application:
b.
Pressurized system installations are considered "permanent equipment" and deemed the property owner's liability in the event of system failure or if the property becomes vacated.
c.
The Building and Permit Services will review all sump pump or sewage ejector installations for compliance with Uniform Plumbing Code and Oregon State Plumbing Specialty Code.
d.
Bay Doors and Other Interior Transfer Areas. Because interior material transfer areas are not expected to accumulate precipitation, installation of floor drains is not required or recommended. It is preferable to handle these areas with a dry-mop or absorbent material. If interior floor drains are installed, they must be plumbed to the City's sanitary sewer facility or authorized pretreatment facility. Interior transfer areas may not be sloped to drain to the exterior of the building.
e.
Bay doors and other interior transfer areas must be designed so that stormwater runoff does not enter the building. This can be accomplished by grading or drains. Interior surfaces may not drain or be washed down to the exterior of the building.
6.
Signage.
a.
Signage must be provided at the material transfer area and must be plainly visible from all surrounding activity areas.
7.
Additional Requirements.
a.
Bay doors and other interior transfer areas must provide a 10-foot "no obstruction zone" beyond the entrance within the building. This will allow the transfer of materials to occur with the truck or trailer end placed at least 5 feet inside the building, with an additional staging area of 5 feet beyond that. The "no obstruction" zone must be clearly identified on the stormwater management plan and on the building plan at the time of the building permit application. The area must be identified at the facility by painting the "no obstruction zone" with bright or fluorescent floor paint.
b.
Shut-off valves will be required under the following situations:
i.
Site activity areas that are exposed to corrosives or oxidizers that can harm conveyance system components (such as battery acid).
ii.
Substances that do not settle or remain in 1 location, but are capable of being dissolved in or float on top of water (such as oil and grease). These substances can spread rapidly into downstream systems, causing widespread impacts and difficult clean-up situations.
iii.
Substances that are known to infiltrate through soils and contaminate groundwater.
c.
Valves located in material transfer areas are typically left open to facilitate drainage during normal conditions, and immediately closed in the event of a spill.
d.
Prior to transfer activities of harmful substances, the valves should be closed and only re-opened after the transfer is complete. The shut-off valves must be located on private property and downstream of the exposed area's collection system.
H Equipment and/or Vehicle Washing Facilities.
1.
Equipment and/or vehicle washing facilities include designated equipment and/or vehicle washing or steam cleaning areas, including smaller activity areas such as wheel washing stations.
2.
Cover.
a.
The washing area must be covered with a permanent canopy or roof so precipitation cannot come in contact with the washing activity area. Precipitation must be directed from the cover to a stormwater destination that meets all applicable code requirements.
b.
Covers 10 feet high or less must have a minimum overhang of 3 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated washing activity area it is to cover.
c.
Covers higher than 10 feet must have a minimum overhang of 5 feet on each side. The overhang must be measured relative to the perimeter of the hydraulically isolated washing activity area it is to cover.
3.
Pavement.
a.
A paved wash pad must be placed under and around the washing activity area with asphalt or concrete that meets all applicable building code requirements. Sizing of the paved area must adequately cover the activity area, including the placement of the vehicle or piece of equipment to be cleaned.
4.
Drainage.
a.
The paved area beneath the cover must be hydraulically isolated through grading, berms, or drains to prevent uncontaminated stormwater from running onto the area and carrying pollutants away.
b.
Drainage from the hydraulically isolated area must be directed to the City's sanitary sewer, or authorized pretreatment facility.
c.
Surrounding runoff must be directed away from the hydraulically isolated washing pad to a stormwater destination that meets all applicable requirements of the Springfield Development Code.
5.
Oil Control.
a.
All vehicle and equipment washing activities will be reviewed for needed oil controls to comply with the City's adopted plumbing code and Metropolitan Wastewater Management Commission requirements for pretreatment.
b.
The following design criteria are established for oil/water separators discharging to a sanitary sewer facility:
i.
Washing Areas Protected with a Cover or Located Inside a Structure:
Baffled oil/water separators and spill control (SC-Type) separators must not be allowed for use with equipment and/or vehicle washing applications.
Note: activities and processes of a washing facility change over time and the introduction of heat and surfactants may occur.
ii.
Coalescing plate separators must be designed to achieve 100 ppm non-polar oil and grease in the effluent from the peak flow generated by the washing activity. Testing information must be submitted by the manufacturer of the unit that supports the 100 ppm effluent standard at the calculated flow rate. Standard flow from a 5/8 inch hose is estimated to be 10 gpm. For specially designed washing units, check the vendor specifications for maximum flow rates.
iii.
Any pumping devices must be installed downstream of the separator to prevent oil emulsification.
iv.
Separator details must be shown on the building plans submitted for permit, and must match manufacturer specifications and details, including the unit flow rate, effluent water quality, and maximum process flow rate.
c.
On-site wash recycling systems wash may be used for oil control as long as they can meet effluent discharge limits for the City's sanitary sewer system. A detail of the wash recycling system and vendor specifications identifying effluent efficiencies must be submitted as part of the building plans at the time of building permit application.
I Covered Vehicle Parking Structures.
1.
Covered vehicle parking structures include enclosed buildings, not including single-level covers such as canopies, overhangs, and carports, used to cover parked vehicles.
2.
Drainage.
a.
Stormwater runoff from the top floor of a multi-level parking structure must be directed to a stormwater destination that meets all water quality requirements of the Springfield Development Code and any other applicable code requirements.
b.
Drainage from lower floor of a multi-level parking structure is not expected to accumulate significant amounts of precipitation runoff and drainage facilities are not required for the lower floors.
c.
If the applicant elects to install drainage facilities, the drainage from the lower floors must be directed to the sanitary sewer.