Fennville City Zoning Code
ARTICLE 17
Parking, Loading, Road Design, Driveways, and Stormwater
§ 450-1701 Scope of off-street parking requirements.
A.
Compliance with the off-street parking regulations shall be required as follows:
(1)
General applicability. For all buildings and uses established after the effective date of this chapter, off-street parking shall be provided as required in this article prior to issuance of a certificate of occupancy. However, where a building permit has been issued prior to the effective date of the chapter and construction has been diligently carried out, compliance with the approved parking requirements at the time of issuance of the building permit shall be required.
(2)
On-street parking permitted. On-street parking, including overnight parking, shall be permitted on all public streets and roads within the City, unless otherwise indicated by signage or policy implemented by the City Commission.
(3)
Change in use or intensity. Whenever use of a building, structure, or lot is changed, parking facilities shall be provided as required by this chapter for the new use, regardless of any variance which may have been in effect prior to change of use. If the intensity of use of any building, structure, or lot is increased through the addition of dwelling units, increase in floor area, increase in seating capacity, or through other means as determined by the City Zoning Administrator, additional off-street parking shall be provided for such increase in intensity of use.
(4)
Existing parking facilities. Off-street parking facilities in existence on the effective date of this chapter shall not thereafter be reduced below, or if already less than, shall not be further reduced below the requirements for the use being served as set forth in this chapter. An area designated as required off-street parking shall not be changed to any other use unless equal facilities are provided elsewhere in accordance with the provisions of this chapter.
(5)
Additional off-street parking: maximum parking. Nothing in this chapter shall be deemed to prevent voluntary establishment of off-street parking facilities to serve an existing use of land or buildings, or to prevent provision of additional parking facilities beyond what is required by the chapter, provided all such parking is in conformance with the regulations herein. Except for single-family, two-family, and three-family residential uses, any person proposing the provision of greater than 125% of the minimum required off-street parking as specified in this article shall demonstrate to the Planning Commission sufficient justification for the additional parking.
§ 450-1702 Off-street parking and loading requirements.
A.
Off-street parking required. Unless otherwise specified, all buildings located in the City shall provide off-street parking adequate for the use intended.
B.
Dimensional requirements. The dimension of off-street parking spaces shall be in accordance with the following minimum dimensions:
Parking Pattern | Maneuvering Lane Width | Parking Space Width | Parking Space Length | Total Width of One Tier of Spaces Plus Maneuvering Lane | Total Width of Two Tiers of Spaces Plus Maneuvering Lane |
|---|---|---|---|---|---|
0° parallel parking | 12 feet | 8 feet | 23 feet | 20 feet | 28 feet |
30° to 53° diagonal | 13 feet | 9 feet | 20 feet | 33 feet | 53 feet |
54° to 74° diagonal | 18 feet | 9 feet | 21 feet | 39 feet | 60 feet |
75° to 90° diagonal | 25 feet | 9 feet | 19 feet | 44 feet | 63 feet |
C.
Residential off-street parking. Parking in residential districts is only permitted as an accessory use or as a transitional use. In no case is it intended that parking or access drives to parking be permitted as a principal use of any residentially zoned or used lot.
D.
Nonresidential off-street parking. Except in parking exempt areas, provisions shall be made for off-street parking for all nonresidential buildings or additions to such buildings in all districts. The conversion of an existing residence to any other use shall be deemed to be a new use, which must meet all provisions of this chapter.
E.
Mixed occupancies and uses not specified. In the case of mixed uses, the total requirements for off-street parking areas shall be the sum of the requirements of the various uses computed separately. Parking areas for churches, theaters, or other uses in which the primary parking demand occurs out of normal store operation hours may be jointly used where adequate arrangements are made to ensure that the space is available for each function.
F.
Location of off-street parking facilities. Off-street parking facilities shall be located as hereafter specified. Where a distance is specified, the distance shall be measured from the nearest point of the parking facility to the nearest point of the building that such facility is required to serve, as follows:
(1)
For all residential buildings and for all nonresidence buildings in residential districts, required parking shall be provided on the same plot as the building.
(2)
For all nonresidential uses in the B-1 District, required parking shall be provided within 500 feet, except for nonresidential uses in the CBD District.
(3)
For E Enterprise District uses, required parking shall be provided within 300 feet.
G.
Parking areas in B-1 and Enterprise Districts. Every parcel of land hereafter established as a public or private parking area in the B-1 or Enterprise Districts, or hereafter enlarged or altered, shall be developed and maintained in accordance with the following requirements:
(1)
Screening required. Off-street parking area shall be effectively screened on any side which adjoins or faces premises situated in any residential district or use or institutional premises, by vegetative screening, fence, wall, other material approved by the Planning Commission. Screening shall be compliant with standards set forth in Article 15.
(2)
Location of screening. Required screening shall be located on the lot line except where underground utilities interfere. Upon review of the site plan, the Planning Commission may approve an alternate location for the screening or may waive the screening requirement if in specific cases it would not serve the purposes of screening the parking area effectively.
(3)
Screening materials. Such screening shall have no openings for vehicular traffic or other purposes, except as otherwise provided in this chapter and except such openings as may be approved or required by the Police Department, Fire Department, or the Building Inspector. All required screening shall be constructed of materials that are durable, weather resistant, rust proof and easily maintained. Masonry walls may be constructed with openings which do not in any square section (height and width) exceed 20% of the surface. The openings shall be so spaced as to maintain the obscuring character required and shall not reduce the minimum height requirement.
(4)
Exemptions. The requirement for screening between off-street parking areas, outdoor storage areas, and any abutting residential district or use shall not be required when such areas are located more than 200 feet distant from such abutting residential district or use.
(5)
Waivers. The Planning Commission may waive or modify the screening requirements, provided that sufficient justification for a differing standard is more appropriate for the proposed use. In no instance shall the required screening wall be less than four feet, six inches in height.
(6)
Surfacing. Every such off-street parking area shall be surfaced in accordance with this chapter.
(7)
Off-street parking lot lighting. Any lighting in connection with off-street parking shall be designed to provide adequate cover for safety but also the least light necessary to increase pedestrian safety and comfort while incorporating measures to preserve dark skies and reduce glare. All outdoor lighting shall be cut-off, shielded, and directed so that no light is cast upward into the sky or outward onto adjoining properties. All proposed lighting shall comply with standards set forth in Article 16.
(8)
Planning Commission review. All off-street parking areas shall be subject to the approval of the Planning Commission to ensure its adequacy in relation to traffic safety, lighting, and protection of adjacent property.
H.
Requirements for parcels subject to architectural standards. Additional requirements within the CBD District and applicable parcels in the B-1 District, subject to architectural standards set forth in § 450-1108:
(1)
In lieu of the provision of on-site parking, the Design Review Committee may recommend, and the Planning Commission may approve, a shared parking agreement with another property located not more than 500 feet from the property under review. Such an agreement shall be in writing and shall include assurances satisfactory to the City that the parking needs of the proposed development shall be adequately met. For parking lots accommodating more than 25 parking spaces, the following standards apply:
(a)
Parking lots shall provide shared access with adjoining uses where feasible.
(b)
Parking areas shall be designed, built, and screened so as to reasonably shield them from view from Main Street.
(c)
Planter islands shall be provided within the parking area.
(d)
Each parking area shall have not more than two driveways connecting to other parking areas.
(2)
All off-street parking shall be located at the side or rear of the primary use and provide landscape buffering to separate parking and mitigate the visual and environmental impact of parking lots.
I.
Parking areas in residential districts. Any person desiring to establish a parking area as an accessory use in a residential district shall submit plans to the Planning Commission showing the location, size, shape, design, landscape, curb cuts, and other features of the parking lot. All such parking areas required for new multiple-family dwellings and nonresidential buildings in all residential districts may then be authorized, subject to the following conditions:
(1)
All parking areas shall be landscaped, screened, surfaced, and drained appropriately.
(2)
No part of such parking areas shall extend into the required front yard more than 50% of the front yard required for a residential building. In either case, the front yard area not occupied by the access drive shall be landscaped.
(3)
All such parking areas shall be at least 40 feet in width.
(4)
Such parking areas shall be used solely for the parking of passenger automobiles, and no commercial repair work or sales or service of any kind shall be conducted on such parking lot.
(5)
Each entrance to and exit from such parking lot shall be at least 20 feet in distance from any adjacent property located in any residential district, and the location and design of entrances, exits, surfacing, landscaping, marking, and lighting shall be subject to the approval of the Planning Commission to ensure adequate relation to traffic safety, lighting, and protection of the adjacent residential area.
(6)
The Zoning Administrator shall thereafter issue a permit, which may be revoked at any time the aforementioned requirements are not complied with. Any person operating the premises to which said permit relates in violation of any of the conditions specified by this chapter or fixed to such permit shall be deemed a violation of this chapter and shall be subject to the penalties prescribed in this chapter.
J.
Table of Parking Requirements. The amount of required off-street parking space for new uses or buildings, additions thereto, and additions to existing buildings, as specified above, shall be determined in accordance with the following table, and the space, so required, shall be stated in the application for a building permit and shall be irrevocably reserved for such use and/or shall comply with the initial part of this section. Land uses within the CBD shall be exempt from the Table of Parking Requirements. When calculations for determining the required number of parking spaces results in a fractional space, any fraction of less than 1/2 may be disregarded, while a fraction of 1/2 or more shall be counted as one space. For those uses not specifically mentioned, the requirements for off-street parking for a similar use shall apply, subject to review by the Planning Commission and/or Zoning Administrator.
Use | Number of Minimum Parking Spaces |
|---|---|
Residential | |
Single-, two-, three-, and four-family | 2 for each dwelling unit |
Multiple family | 2 for each dwelling unit for developments of 1-24 units; 1.75 space for each dwelling unit for developments of 24+ units |
Manufactured housing community | 2 for each manufactured home site |
Bed-and-breakfast facility | 1 for each sleeping room |
Senior citizen apartments | 3/4 space for each unit when mass transit is provided; 1 space for each unit when not provided |
Institutional | |
Adult foster care facilities | 1/2 space per bed plus 1 space for each employee |
Day-care, pre-school and nursery schools | 1 space for each staff member plus 1 space for every 5 children or 1 space for every 10 children if adequate drop-off facilities are provided |
Home for the aged, nursing homes, convalescent homes | 1 per 600 square feet of gross floor area |
Hospitals | 1 per 600 square feet of gross floor area |
Indoor recreation facilities | 1 for each 4 seats |
Jails | 1 space for each staff member plus 1 space for every 5 cells, in addition to off street loading spaces for delivery and transport vehicles |
Libraries, museums and noncommercial art galleries | 1 for each 500 square feet of gross floor area |
Public or private elementary and middle school | 1 for each classroom, plus 1 space for each 5 fixed seats of any area used for auditorium purposes or for each 35 square feet of seating area where there are no fixed seats |
Private clubs or lodge halls | 1 for each 3 allowed within the maximum occupancy load as established by local, county, or state fire, building, or health codes |
Private golf clubs, swimming pool clubs, tennis clubs or racquetball clubs | Shall be the amount required for each accessory use, including but not limited to: 4 per golf hole; 1 per each 3 persons permitted in a building under the Fire Code |
Religious institutions or similar places of assembly | 1 for each 3 seats, maximum seating capacity in the main unit of worship; or 1 space for each 35 square feet of gross floor area |
Senior high schools | 1 space for each classroom and each other room used by students, plus 1 for each 10 full-time students in addition to the requirements for auditoriums |
Stadium, sport arena or similar place of outdoor assembly | 1 for each 3 seats or 10 feet of bench |
Business and Commercial | |
Automobile (vehicle) gasoline and service stations, convenience stores in conjunction with service or gas stations | 1 space for each fueling station plus 1 for every 400 square feet of floor area devoted to retail sales |
Automobile (vehicle) repair shops | 2 for each lubrication stall, rack, pit, or pump |
Automobile (vehicle) sales and showrooms | 1 for each 400 square feet of gross floor area of sales room |
Automobile (vehicle) washes | 1 for 250 square feet of gross floor area |
Bar/lounge/tavern | 1 space for each 75 square feet of gross floor area |
Beauty parlor, barber shop, nail salon, and other personal service establishments | 3 spaces for each of the first 2 chairs, and 1 1/2 spaces for each additional chair |
Bowling alleys | 5 for each 1 bowling lane |
Dance halls, pool or billiard parlors, roller or ice rinks, exhibition halls and assembly halls without fixed seats | 1 for each 3 seats or 1 for each 400 square feet of gross floor area |
Drive-in establishments | 5 queue spaces for each drive-up window, plus 1 parking space for each drive-up window |
Furniture and appliance, household equipment, repair shop, showroom of a plumber, decorator, electrician, or similar trade, and other similar uses | 1 for each 800 square feet of floor area, occupied in processing or manufacturing |
Health spas, gymnasiums and health clubs | 10 for each club or spa plus 1 for every 200 square feet of gross floor area |
Laundromats and coin-operated dry cleaners | 1 for each 2 washing machines |
Mini-warehouses | 1 space per storage unit |
Mortuary or funeral home establishments | 1 for each 100 square feet of gross floor area |
Motel, hotel or other commercial lodging establishments | 1 for each 1 occupancy unit plus 1 for each 1 employee, plus extra spaces for dining rooms, ballrooms, or meeting rooms based upon 1 space for every 2 occupants based on maximum occupancy load |
Restaurants | 1 for each 400 square feet of gross floor area |
Retail stores, except as otherwise specified herein | 1 for each 400 square feet of gross floor area |
Shopping center or clustered commercial | 1 for each 400 square feet of gross floor area |
Enterprise or Industrial | |
Business offices or professional offices, including courthouses and governmental offices | 1 for each 400 square feet of gross floor area |
Professional offices, including veterinary offices and animal clinics | 1 for each 400 square feet of gross floor area |
General manufacturing establishments | 1 space for every 650 square feet of gross floor area, plus 1 space per each 350 square feet of office space |
Light and limited manufacturing | 1 space for every 500 square feet of gross floor area, plus 1 space per each 350 square feet office, sales, or similar space |
Research and development facility | 1 space for every 500 square feet of gross floor area, plus 1 space per each 400 square feet of office, sales, or similar space |
Warehousing | 1 space for every 2,000 square feet of gross floor area |
K.
Required off-street loading. In all districts every building, or part thereof, hereafter erected, which is to be occupied by manufacturing, storage, warehouse, group of stores, or other use similarly requiring the receipt of distribution in vehicles of materials or merchandise, there shall be provided and maintained on the same premises with such buildings, off-street loading spaces in relations to floor area as follows:
Off-Street Loading Requirements | |
5,000 to 20,000 square feet | 1 space |
20,000 to 50,000 square feet | 2 spaces |
50,000 to 100,000 square feet | 3 spaces |
(1)
One additional space for each additional 100,000 square feet or part thereof; provided that:
(a)
Each loading space shall be at least 12 feet in width, 44 feet in length, and have a clearance of 14 feet above grade.
(b)
Such space may occupy all or any part of any required yard or court space, except the front yard.
(2)
Off-street loading space is not to be included as off-street parking space in computation of required off-street parking.
 |
L.
Barrier-free parking requirements. Each parking lot that serves a building, except single-, two-, three- and four-family dwelling units, shall have a number of barrier-free, level parking spaces, identified by an above-grade sign which indicates the spaces are reserved for physically disabled persons. Barrier-free parking shall comply with the State of Michigan Barrier-Free Rules, Michigan Public Act No. 1 of 1966, as amended,[1] and the Federal Americans with Disabilities Act.
(1)
Dimensions of barrier-free parking spaces. Each barrier-free parking space shall comply with the Michigan State Building Code, as amended.
(2)
Minimum required number of barrier-free parking spaces. The number of barrier-free spaces shall be consistent with requirements as described by the Michigan Building Code, as amended.
[1]
Editor's Note: See MCL 125.1351 et seq.
M.
Banked (deferred) parking. If the minimum number of required parking spaces exceeds the amount necessary to serve a proposed use, the Planning Commission may require banked (or deferred) parking, subject to the following:
(1)
The banked (or deferred) parking shall be shown on the site plan and set aside as landscaped open space.
(2)
Banked (or deferred) parking shall be located in areas suitable for future parking and that meet chapter requirements.
(3)
The City may require construction of the banked (or deferred) parking area upon finding that vehicles are regularly parked on unpaved surfaces, on the road, or off-site.
N.
Bicycle parking. Parking facilities for short- and long-term bicycle parking shall be provided to meet the needs of the use. Bicycle parking facilities shall allow a cyclist to safely secure a bicycle from incidental damage or theft, while not hindering access for pedestrians or other vehicles. Bicycle parking facilities shall be located in highly visible and accessible areas.
(1)
Bicycle parking facilities shall be located at least three feet from adjacent walls, poles, landscaping, street furniture, drive aisles, and primary pedestrian routes and at least six feet from vehicle parking spaces.
O.
Surfacing.
(1)
Purpose. It is necessary to provide minimum construction and maintenance standards for driveways and parking areas. The purpose of this section is to prevent washout from unpaved driveways and parking areas from obstructing storm sewers and catch basins and thereby creating drainage problems, and to provide safe access to areas serviced by such driveways and parking areas.
(2)
Surfacing requirements. Except as otherwise provided in this section, all parking spaces in every zoning district and any driveway accessing such parking spaces shall be paved with concrete or bituminous material in accordance with plans approved by the City Engineer. Such concrete pavement shall be of a minimum thickness of six inches. Any bituminous paving shall be of a minimum thickness of three inches and shall be placed upon a base of limestone or gravel a minimum thickness of six inches, unless a differing minimum standard is required by the City Engineer. All paving and/or sealing shall be complete within a period of 12 months after site plan approval.
(a)
Residential off-street parking areas. Off-street parking for residential family dwellings and any driveway accessing such parking shall be paved with concrete or bituminous material in such a manner which is adequate to prevent washout from obstructing storm sewers and catch basins, and in a manner which is adequate to provide safe access to dwellings. The off-street parking areas for residential family dwellings and for any driveways accessing them shall be a minimum of eight feet in width for their entire length and shall at a minimum extend between the public or private right-of-way and the required front setback line on each lot.
§ 450-1703 Street and road design requirements.
A.
Intent. The intent of this section is to apply the City's adopted Complete Streets Resolution by providing street design standards for new developments and to ensure that citywide development creates the least amount of traffic congestion as possible.
B.
Best practices. This section provides requirements that will ensure orderly development by applying best practices for site design and constructing new streets.
C.
Public access required; minimum frontage. The front lot line of all lots shall abut onto a publicly dedicated road right-of-way. The required frontage on an approved road right-of-way shall be equal to or greater than the minimum lot width for the district in which the lot is located. On lots located on a curve, frontage shall be measured along a straight line between the two points where the side lot lines intersect the curved right-of-way line. Frontage on a "T" turnaround shall not be counted toward the minimum road frontage requirements.
D.
General street requirements.
(1)
Street design plan. Where new streets are proposed, a street design plan shall be submitted with a site plan for review and approval by the Planning Commission. All street design plans shall be reviewed and approved by the City Engineer prior to Planning Commission approval.
(2)
Street width. All streets shall be designed to allow sufficient access for emergency vehicles by providing a minimum of 26 feet width of durable surface that is able to withstand the standard emergency vehicle equipment weight. All City rights-of-way shall be a minimum of 66 feet.
(3)
Public street connections. All new streets shall connect to an existing public street or be part of a new street network that connects to an existing public street, unless the only available street connection to the property is a private street.
(4)
Public street and right-of-way standards. Street and right-of-way standards of this section shall be considered the minimum required for new streets and roads within the City. These standards shall not preclude the City Engineer from requiring street or right-of-way conditions above and beyond the requirements of this section.
(a)
Dead ends prohibited. Dead-end streets are prohibited, unless the applicant demonstrates to the satisfaction to the Planning Commission, DPW, City Engineer, or other applicable entities there is a physical, legal, or environmental reason why a dead-end street is necessary. If constructed, a dead-end street shall end in a cul-de-sac or hammer head end. The design of which shall be subject to review and approval by the City Engineer and DPW.
(b)
Gated communities prohibited. All streets shall be open and available to the general public for access to the properties served by the street. Streets shall not be barricaded, gated, or blocked in any way to prevent access by the general public.
 |
(c)
Street vacations. All street vacations are subject to approval by the City Commission.
(d)
City Engineer and DPW standards. All street design standards not described by this chapter shall be subject to standards as established by the City Engineer and DPW.
(e)
Permit required. All new construction, repairs, modifications, other applicable work related to streets, roads, alleys, sidewalks, driveway approaches, crosswalks, or curbs shall require a right-of-way permit issued by the DPW.
(5)
Utility design standards. All underground utilities related to any road work within the City shall be subject to review and approval by the City Engineer and/or City DPW.
(6)
Private streets. Private streets shall be prohibited.
§ 450-1704 Driveway requirements.
A.
Intent. Unimpeded, safe access to parcels of land throughout the City is necessary to provide adequate police and fire protection, ambulance services, and other public services, and to otherwise promote and protect the health, safety, and welfare of the public. The standards and specifications set forth herein are determined to be the minimum standards and specifications necessary to meet the above stated intentions.
B.
Driveway standards. Driveways shall comply with the following minimum requirements in addition to engineering standards reviewed by the City Engineer.
(1)
Minimum driveway setbacks. Driveways shall be set back a minimum of three feet from any side or rear property line unless otherwise specified or required by the City Engineer.
(2)
Permit required. A driveway permit shall be required for the construction or alteration of a driveway in the City. For properties fronting M-89, or any other state-owned and maintained roadway, a driveway permit from the Michigan Department of Transportation (MDOT) shall be required. The permit from MDOT shall be obtained first.
(3)
Access management. The City highly encourages, and may require, cross-access connections to driveways since driveway access points are the main location of crashes and congestion. The location and spacing of driveways directly affects the safety and function of the City street network.
(4)
Driveway alignment. Driveways shall either be aligned with those directly across the street or offset a sufficient distance to achieve the minimum spacing required by the City Engineer or DPW.
(5)
Residential district driveway standards. The following driveway standards apply to all residential and mixed-use districts. The following standards include the minimum requirements, and in no way shall preclude the City Engineer or DPW from requiring additional standards. All driveways are subject to review and approval from the City Engineer and DPW.
Type of Driveway | Minimum Width | Pavement Requirement |
Driveways to individual detached residential units in a plat or site condominium | 9 feet | Paved from front lot line to required setback |
Driveways to individual detached lots not in a plat or site condominium | 8 feet | Paved from front lot line to required setback |
Driveways to single-, two-, three- and four-family attached units | 8 feet | Paved from front lot line to required setback |
(6)
Enterprise District driveway standards. The following standards include the minimum requirements for road design in the Enterprise District. All new roads and driveways are subject to review and approval by the City Engineer and other applicable City departments. The curb and gutter shall be subject to review and approval by the City Engineer and DPW.
Type of Driveway | Minimum Width | Pavement Requirement |
Driveway serving 2 or less parcels or buildings (e.g., office park) | 26 feet | Paved |
Main access driveways for 3 parcels or buildings | 31 feet | Paved |
§ 450-1705 Sidewalks.
A.
Sidewalks required. Sidewalks shall be required in conjunction with all new development or change of use. In new residential subdivisions and condominiums, sidewalks shall be required on both sides of the street.
B.
Location and width. Sidewalks should be a minimum of 10 feet in width in the CBD and must maintain a minimum of five feet of travel area. Sidewalks shall be a minimum of five feet in width in all other zoning districts. Outdoor seating or outdoor sales may encumber up to five feet of the ten-foot sidewalk with a sidewalk permit pursuant to Chapter 350, Article II, Sidewalk Use, of the Code of the City of Fennville. Larger seating areas, sidewalk sales or outdoor displays will require additional sidewalk width.
C.
Maintenance. The DPW shall be responsible for the maintenance, snow removal, removal of debris, and other applicable activities for all sidewalks within the City.
D.
Permits. It shall be the responsibility of the owner or developer to secure any required permits from the City or Michigan Department of Transportation (MDOT) to allow sidewalk construction in a road right-of-way.
§ 450-1706 Stormwater management.
A.
Stormwater plans required. Stormwater plans shall be compliant with the Allegan County Drain Commission's Stormwater Permit Requirements and Site Development Rules. Stormwater plans shall be required for site plan review. Stormwater plans shall include (but not limited to):
(1)
A signed seal from a licensed professional engineer.
(2)
A scale no smaller than one inch equals 100 feet.
(3)
Name, address, telephone number of developer and engineer.
(4)
Description of location.
(5)
Location map.
(6)
North arrow, scale, legend.
(7)
Number of acres to be developed.
(8)
Property legal description.
(9)
Information on utility easements (if applicable), including dimensions, type, and name of grantee.
(10)
Soil types, borings, and elevation.
(11)
All existing and proposed site features (e.g., contours, roads, buildings, utilities, structures, etc.).
(12)
Drainage details (e.g., drain system, bodies of water location and size, proposed drainage conditions, stormwater best management practices, stormwater runoff discharge locations, etc.).
(13)
A drainage map that clearly shows topography, sub-catchment boundaries, acreages and flow paths of tributary areas to each point of discharge from the development, including tributary areas originating outside of the development. Also identify tributary areas to inlets, culverts, and other stormwater BMPs.
(14)
Documentation and/or calculations required to demonstrate an adequate outlet, including the dimensions/sizes and locations of upstream and downstream drainage routes and infrastructure.
(15)
Calculations of stormwater rates and volumes for each point of discharge or treatment for pre-development and post-development conditions.
(16)
Design summary report, including at a minimum: description of stormwater management plan for the site, identified contributing areas with land cover types, soils and runoff coefficients, times-of-concentration, runoff volumes, peak discharges, high water levels, sewer hydraulic grade line, required storage volumes, and volumes provided.
§ 450-1707 Green infrastructure requirements.
A.
Intent. It is the City's goal to support, promote, and encourage green infrastructure elements in all building and site design. The City is supportive of mechanisms that utilize best practices in green infrastructure, known as Green Infrastructure Best Management Practices (BMPs). The City is committed to sustainable and low impact development building and site design.
B.
Green infrastructure BMPs and site plan requirements. Green infrastructure BMPs shall be used to the maximum extent applicable to comply with all stormwater management requirements as described by Allegan County, the City Engineer, and the DPW.
(1)
The following are green infrastructure BMPs for stormwater management and treatment techniques. All new construction in the City shall be required to incorporate a minimum of two of the following green infrastructure BMPs in the proposed building and/or site design. Other green infrastructure BMPs not listed below may be approved by the City Engineer or DPW. Refer to the images below.
(a)
Pervious durable surfaces. All paved areas shall be of permeable and durable surfaces.
(b)
Rain gardens. All landscaped parking lot islands shall be constructed as rain gardens.
(c)
Vegetated swales. All applicable landscaped swales shall be vegetated.
(d)
Vegetated green roofs.
(e)
Tree box filters and constructed filters.
(f)
Vegetated filter strips.
(g)
Minimized soil compactions.
(h)
Natural flow paths.
 Pervious grass pavers |  Permeable Pavement |
 Vegetated Swale |  Natural Flow Path |
 Tree box filters |  Minimized Soil Compaction |
 Vegetated green roof |  Rain Garden |