A. Certain Residential Subdivisions: Residential subdivisions with dwelling unit densities exceeding those in the tables in sections
11-92-8,
11-92-9 and
11-92-10 of this chapter can only be allowed if designed and approved as residential planned unit developments under section
11-92-17 of this chapter. Only land above the ordinary high water level of public waters shall be used to meet lot area standards, and lot width standards shall be met at both the ordinary high water level and at the building line. The sewer lot area dimensions shall only be used if publicly owned or controlled sewer system service is available to the property.
B. Duplex, Triplex And Quadraminium Subdivisions: Subdivisions of duplexes, triplexes, and quadraminiums on natural environment lakes shall also meet the following standards:
1. Each building shall be set back at least two hundred feet (200') from the ordinary high water level;
2. Each building must have common sewage treatment and water systems in one location and serve all dwelling units in the building;
3. Watercraft docking facilities for each lot shall be centralized in one location and serve all dwelling units in the building; and
4. No more than twenty five percent (25%) of a lake's shoreland shall be in duplex, triplex, or quad developments.
C. Prohibited Lots: Lots intended as controlled private access to public waters or as recreational areas for use by other than those residents residing on the lot in question are expressly prohibited.
D. Placement, Design And Height Of Structures:
1. Placement Of Structures On Lots: When more than one setback is applied to a site, structures and facilities shall be located to meet all setbacks. Where structures exist on the adjoining lots on both sides of a proposed building site, structure setbacks may be altered without a variance to conform to the adjoining setbacks from the ordinary high water level, provided the proposed building site is not located in a shore impact zone or in a bluff impact zone. Subject to other more restrictive limitations as may be imposed by this title, structures shall be located as follows:
a. Additional Structure Setbacks: The following additional structure setbacks apply, regardless of the classification of the water body.
| |
Top of bluff | 30 |
Unplatted cemetery | 50 |
Right-of-way line of Federal, State, or County highway | 30 |
Right-of-way line of City road, public street, or other roads or streets not classified | Subject to individual district requirements |
b. Bluff Impact Zones: Structures and accessory facilities, except stairways and landings, shall not be placed within bluff impact zones.
c. Uses Without Water Oriented Needs: Uses without water oriented needs shall be located on lots or parcels without public waters frontage, or, if located on lots or parcels with public waters frontage, shall either be set back double the normal ordinary high water level setback or be substantially screened from view from the water by vegetation or topography, assuming summer, leaf-on conditions.
2. Design Criteria For Structures:
a. High Water Elevations: Structures shall be placed in accordance with any floodplain regulations applicable to the site. Where these controls do not exist, the elevation to which the lowest floor, including basement, is placed or floodproofed shall be determined as follows:
(1) For lakes, by placing the lowest floor at a level at least three feet (3') above the highest known water level, or three feet (3') above the ordinary high water level, whichever is higher. (Prior Code § 20-92-11)
(2) For rivers and streams, by placing the lowest floor at least three feet (3') above the flood of record, if data is available. If data is not available, by placing the lowest floor at least three feet (3') above the ordinary high water level, or by conducting a technical evaluation to determine effects of proposed construction upon flood stages and flood lows and to establish a flood protection elevation. Under all three (3) approaches, technical evaluations shall be done by a qualified engineer or hydrologist consistent with Minnesota Rules parts 6120.5000 to 6120.6200 governing the management of floodplain areas. If more than one approach is used, the highest flood protection elevation determined shall be used for placing structures and other facilities. (Prior Code § 20-92-11; amd. 2018 Code)
(3) Water oriented accessory structures may have the lowest floor placed lower than the elevation determined if the structure is constructed of flood resistant materials to the elevation, electrical and mechanical equipment is placed above the elevation and, if long duration flooding is anticipated, the structure is built to withstand ice action and wind driven waves and debris.
b. Water Oriented Accessory Structures: Subject to other more restrictive limitations which may be imposed by this title, each lot may have one water oriented accessory structure not meeting the normal structure setback in sections
11-92-8,
11-92-9 and
11-92-10 of this chapter if the water oriented accessory structure complies with the following provisions:
(1) The structure or facility shall not exceed ten feet (10') in height, exclusive of safety rails, and cannot occupy an area greater than two hundred fifty (250) square feet. Detached decks shall not exceed eight feet (8') above grade at any point;
(2) The setback of the structure or facility from the ordinary high water level shall be at least ten feet (10');
(3) The structure or facility shall be treated to reduce visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks or color, assuming summer, leaf-on conditions;
(4) The roof may be used as a deck with safety rails, but shall not be enclosed or used as a storage area;
(5) The structure or facility shall not be designed or used for human habitation and must not contain water supply or sewage treatment facilities; and
(6) As an alternative for general development and recreational development water bodies, water oriented accessory structures used solely for watercraft storage, and including storage of related boating and water oriented supporting equipment, may occupy an area up to four hundred (400) square feet, provided the maximum width of the structure is twenty feet (20') as measured parallel to the configuration of the shoreline.
c. Stairways, Lifts And Landings: Stairways and lifts are the preferred alternative to major topographic alterations for achieving access up and down bluffs and steep slopes to shore areas. Subject to other more restrictive limitations which may be imposed by this title, stairways and lifts shall meet the following design requirements:
(1) Stairways and lifts shall not exceed four feet (4') in width on residential lots. Wider stairways may be used for commercial properties and public open space recreational properties;
(2) Landings for stairways and lifts on residential lots shall not exceed thirty two (32) square feet in area. Landings larger than thirty two (32) square feet may be used for commercial properties and public open space recreational properties;
(3) Canopies or roofs shall not be allowed on stairways, lifts, or landings;
(4) Stairways, lifts, and landings may be either constructed above the ground on posts or pilings, or placed into the ground, provided they are designed and built in a manner that ensures control of soil erosion;
(5) Stairways, lifts, and landings shall be located in the most visually inconspicuous portions of lots, as viewed from the surface of the public water, assuming summer, leaf-on conditions, whenever practical; and (Prior Code § 20-92-11)
(6) Facilities such as ramps, lifts, or mobility paths for persons with physical disabilities are also allowed for achieving access to shore areas; provided, that there shall be compliance with the dimensional and performance standards of subsections D2c(1) to D2c(5) of this section in addition to the requirements of Minnesota Regulations chapter 1340. (Prior Code § 20-92-11; amd. 2018 Code)
d. Significant Historic/Archeological Sites: No structure may be placed on a significant historic and/or archeological site in a manner that affects the values of the site unless adequate information about the site has been removed and documented in a public repository.
e. Steep Slopes: The Zoning Administrator shall evaluate possible soil erosion impacts and development visibility from public waters before issuing a permit for construction of sewage treatment systems, roads, driveways, structures, or other improvements on steep slopes. When determined necessary, conditions shall be attached to issued permits to prevent erosion and to preserve existing vegetation screening of structures, vehicles, and other facilities as viewed from the surface of public waters, assuming summer, leaf-on vegetation.
E. Shoreland Alterations: Alterations of vegetation and topography shall be regulated to prevent erosion into public waters, fix nutrients, preserve shoreland aesthetics, preserve historic value, prevent bank slumping, and protect fish and wildlife habitat.
1. Vegetation Alterations:
a. Vegetation alteration necessary for the construction of structures and sewage treatment systems and the construction of roads and parking areas regulated by subsection F of this section shall be exempt from the vegetation alteration standards that follow.
b. Removal or alteration of vegetation, except for agricultural and forest management uses as regulated in subsection H of this section may be allowed subject to the following standards:
(1) Intensive vegetation clearing within the shore and bluff impact zones and on steep slopes shall not be allowed. Intensive vegetation clearing for forest land conversion to another use outside of these areas is allowable as a conditional use if an erosion control and sedimentation plan may be developed and approved by the Soil and Water Conservation District in which the property is located.
(2) In shore and bluff impact zones and on steep slopes, limited clearing of trees and shrubs and cutting, pruning, and trimming of trees may be allowed to provide a view to the water from the principal dwelling site and to accommodate the placement of stairways and landings, picnic areas, access paths, livestock watering areas, beach and watercraft access areas, and permitted water oriented accessory structures or facilities; provided, that:
(A) The screening of structures, vehicles, or other facilities as viewed from the water, assuming summer, leaf-on conditions, shall not be substantially reduced;
(B) Along rivers, existing shading of water surfaces shall be preserved; and
(C) The above provisions shall not be applicable to the removal of trees, limbs, or branches that are dead, diseased, or pose safety hazards.
2. Topographical Alterations/Grading And Filling:
a. Subject to other more restrictive limitations which may be imposed by this title, grading and filling and excavations necessary for the construction of structures, sewage treatment systems, and driveways under validly issued construction permits for these facilities do not require the issuance of a separate grading and filling permit. However, the grading and filling standards in this section shall be incorporated into the issuance of permits for construction of structures, sewage treatment systems, and driveways.
b. Public roads and parking areas as regulated by subsection F of this section.
c. Notwithstanding subsections E2a and E2b of this section, a grading and filling permit shall be required for:
(1) The movement of more than ten (10) cubic yards of material on steep slopes or within shore or bluff impact zones; and
(2) The movement of more than fifty (50) cubic yards of material outside of steep slopes and shore and bluff impact zones.
d. The following considerations and conditions shall be adhered to during the issuance of construction permits, grading and filling permits, conditional use permits, variances and subdivision approvals:
(1) Grading or filling in any type 2, 3, 4, 5, 6, 7, or 8 wetland shall be evaluated to determine how extensively the proposed activity would affect the following functional qualities of the wetland:
(A) Sediment and pollution trapping and retention;
(B) Storage of surface runoff to prevent or reduce flood damage;
(C) Fish and wildlife habitat;
(E) Shoreline or bank stabilization; and
(F) Noteworthiness, including special qualities such as historic significance, critical habitat for endangered plants and animals, or others.
This evaluation shall also include a determination of whether the wetland alteration being proposed requires permits, reviews, or approvals by other local, State, or Federal agencies such as a watershed district, the Minnesota Department of Natural Resources, or the United States Army Corps of Engineers. The applicant shall be so advised.
(2) Alterations shall be designed and conducted in a manner that ensures only the smallest amount of bare ground is exposed for the shortest time possible;
(3) Mulches or similar materials shall be used, where necessary, for temporary bare soil coverage, and permanent vegetation cover shall be established as soon as possible;
(4) Methods to minimize soil erosion and to trap sediments before they reach any surface water feature shall be used;
(5) Altered areas shall be stabilized to acceptable erosion control standards consistent with the field office technical guides of the local Soil and Water Conservation Districts and the United States Soil Conservation Service;
(6) Fill or excavated material shall not be placed in a manner that creates an unstable slope;
(7) Plans to place fill or excavated material on steep slopes shall be reviewed by the City Engineer for continued slope stability and shall not create finished slopes of thirty percent (30%) or greater;
(8) Fill or excavated material shall not be placed in bluff impact zones;
(9) Any alterations below the ordinary high water level of public waters must first be authorized by the Commissioner of the Department of Natural Resources under Minnesota Statutes section 103G.245.
(10) Alterations of topography shall only be allowed if they are accessory to permitted or conditional uses and do not adversely affect adjacent or nearby properties; and
(11) Placement of natural rock riprap, including associated grading of the shoreline and placement of a filter blanket, may be permitted if the finished slope does not exceed three feet (3') horizontal to one foot (1') vertical, the landward extent of the riprap is within ten feet (10') of the ordinary high water level, and the height of the riprap above the ordinary high water level does not exceed three feet (3').
e. Excavations where the intended purpose is connection to a public water, such boat slips, canals, lagoons, and harbors shall be controlled by local shoreland controls. Permission for excavations may be given only after the Commissioner of the Department of Natural Resources has approved the proposed connection to public waters.
F. Placement And Design Of Roads, Driveways And Parking Areas: Subject to other more restrictive limitations which may be imposed by this title, the following standards shall apply in regard to roadway, driveway, and parking area placement and design within the Shoreland Overlay District of Otsego:
1. Public and private roads and parking areas shall be designed to take advantage of natural vegetation and topography to achieve maximum screening from view from public waters. Documentation shall be provided by a qualified individual that all roads and parking areas are designed and constructed to minimize and control erosion to public waters consistent with the field office technical guides of the local Soil and Water Conservation District, or other applicable technical materials.
2. Roads, driveways, and parking areas shall meet structure setbacks and shall not be placed within bluff and shore impact zones when other reasonable and feasible placement alternatives exist. If no alternatives exist, they may be placed within these areas and shall be designed to minimize adverse impacts.
3. Public and private watercraft access ramps, approach roads, and access related parking areas may be placed within shore impact zones, provided the vegetative screening and erosion control conditions of this subsection are met. For private facilities, the grading and filling provisions of subsection E of this section shall be met.
G. Stormwater Management: Subject to other more restrictive limitations which may be imposed by this title or other provisions of this Code, the following general and specific standards shall apply in regard to stormwater management within the Shoreland District of Otsego:
a. When possible, existing natural drainageways, wetlands, and vegetated soil surfaces shall be used to convey, store, filter, and retain stormwater runoff before discharge to public waters.
b. Development shall be planned and conducted in a manner that shall minimize the extent of disturbed areas, runoff velocities, erosion potential, and reduce and delay runoff volumes. Disturbed areas shall be stabilized and protected as soon as possible and facilities or methods used to retain sediment on the site.
c. When development density, topographic features, and soil and vegetation conditions are not sufficient to adequately handle stormwater runoff using natural features and vegetation, various types of constructed facilities such as diversions, settling basins, skimming devices, dikes, waterways, and ponds may be used. Preference shall be given to designs using surface drainage, vegetation, and infiltration rather than buried pipes and manmade materials and facilities.
a. Impervious surface coverage of lots shall not exceed twenty five percent (25%) of the lot area.
b. When constructed facilities are used for stormwater management, documentation shall be provided by a qualified individual that they are designed and installed consistent with the field office technical guide of the local Soil and Water Conservation Districts.
c. New constructed stormwater outfalls to public waters shall provide for filtering or settling of suspended solids and skimming of surface debris before discharge.
H. Special Provisions For Commercial, Industrial, Public/Semipublic, Agricultural, Forestry And Extractive Uses And Mining Of Metallic Minerals And Peat:
1. Standards For Commercial, Industrial, Public And Semipublic Uses:
a. Surface water oriented commercial uses and industrial, public, or semipublic uses with similar needs to have access to and use of public waters may be located on parcels or lots with frontage on public waters. Subject to other more restrictive limitations which may be imposed by this title, those uses with water oriented needs shall meet the following standards:
(1) In addition to meeting impervious coverage limits, setbacks, and other zoning standards in this title, the uses shall be designed to incorporate topographic and vegetative screening of parking areas and structures;
(2) Uses that require short term watercraft mooring for patrons shall centralize these facilities and design them to avoid obstructions of navigation and to be the minimum size necessary to meet the need; and
(3) Uses that depend on patrons arriving by watercraft may use signs and lighting to convey needed information to the public, subject to the following general standards:
(A) No advertising signs or supporting facilities for signs may be placed in or upon public waters. Signs conveying information or safety messages may be placed in or on public waters by a public authority or under a permit issued by the Zoning Administrator;
(B) Signs may be placed, when necessary, within the shore impact zone if they are designed and sized to be the minimum necessary to convey needed information. They shall only convey the location and name of the establishment and the general types of goods or services available. The signs shall not contain other detailed information such as product brands and prices, shall not be located higher than ten feet (10') above the ground, and shall not exceed thirty two (32) square feet in size. If illuminated by artificial lights, the lights shall be shielded or directed to prevent illumination out across public waters; and
(C) Other outside lighting may be located within the shore impact zone or over public waters if it is used primarily to illuminate potential safety hazards and is shielded or otherwise directed to prevent direct illumination out across public waters. This does not preclude use of navigational lights.
b. Uses without water oriented needs shall be located on lots or parcels without public waters frontage, or, if located on lots or parcels with public waters frontage, shall either be set back double the normal ordinary high water level setback or be substantially screened from view from the water by vegetation or topography, assuming summer, leaf-on conditions.
2. Agriculture Use Standards:
a. General cultivation farming, grazing, nurseries, horticulture, truck farming, sod farming, and wild crop harvesting may be permitted uses if steep slopes and shore and bluff impact zones are maintained in permanent vegetation or operated under an approved conservation plan (resource management systems) consistent with the field office technical guides of the local Soil and Water Conservation Districts or the United States Soil Conservation Service, as provided by a qualified individual or agency.
b. The shore impact zone for parcels with permitted agricultural land uses is equal to a line parallel to and fifty feet (50') from the ordinary high water level.
c. Animal feedlots shall meet the requirements of this title, as well as the following standards:
(1) New feedlots shall not be located in the shoreland of watercourses or in bluff impact zones and shall meet a minimum setback of three hundred feet (300') from the ordinary high water level of all public waters basins; and
(2) Modifications or expansions to existing feedlots that are located within three hundred feet (300') of the ordinary high water level or within a bluff impact zone may be allowed if they do not further encroach into the existing ordinary high water level setback or encroach on bluff impact zones.
3. Forest Management Standard: The harvesting of timber and associated reforestation shall be conducted consistent with the provisions of the Minnesota Nonpoint Source Pollution Assessment-Forestry and the provisions of Water Quality in Forest Management "Best Management Practices in Minnesota".
4. Extractive Use Standards:
a. Site Development And Restoration Plan: An extractive use site development and restoration plan shall be developed, approved, and followed over the course of operation of the site. The plan shall address dust, noise, possible pollutant discharges, hours and duration of operation, and anticipated vegetation and topographic alterations. It must also identify actions to be taken during operation to mitigate adverse environmental impacts, particularly erosion, and shall clearly explain how the site will be rehabilitated after extractive activities end.
b. Setbacks For Processing Machinery: Processing machinery shall be located consistent with setback standards for structures from ordinary high water levels of public waters and from bluffs.
5. Mining Of Metallic Minerals And Peat: Mining of metallic minerals and peat, as defined in Minnesota Statutes sections 93.44 to 93.51, shall be a permitted use provided the provisions of Minnesota Statutes sections 93.44 to 93.51 are satisfied.
I. Water Supply And Sewage Treatment:
a. Any public or private supply of water for domestic purposes shall meet or exceed standards for water quality of the Minnesota Department of Health and the Minnesota Pollution Control Agency.
b. Private wells shall be located, constructed, maintained, and sealed in accordance with, or in a more thorough manner than, the Water Well Construction Code of the Minnesota Department of Health.
2. Sewage Treatment: Any premises used for human occupancy shall be provided with an adequate method of sewage treatment, as follows:
a. Publicly owned sewer systems shall be used where available.
b. All private sewage treatment systems shall meet or exceed the Minnesota Pollution Control Agency's standards for individual sewage treatment systems contained in the document titled "Individual Sewage Treatment Systems Standards, Chapter 7080", a copy of which is hereby adopted by reference and declared to be a part of this title.
c. On site sewage treatment systems shall be set back from the ordinary high water level in accordance with the setbacks contained in this chapter.
d. All proposed sites for individual sewage treatment systems shall be evaluated in accordance with the criteria in this subsection. If the determination of a site's suitability cannot be made with publicly available, existing information, it shall then be the responsibility of the applicant to provide sufficient soil borings and percolation tests from on site field investigations.
(1) Depth to the highest known or calculated groundwater table or bedrock.
(2) Soil conditions, properties, and permeability.
(4) The existence of lowlands, local surface depressions, and rock outcrops.
e. Nonconforming sewage treatment systems shall be regulated and upgraded in accordance with subsection 11-92-12C of this chapter. (Prior Code § 20-92-11)