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5.a 2 DNR model-with-comm
DEPARTMENT OF NATURAL RESOURCES Minnesota Model Shoreland Management Ordinance The model includes language that is in the statewide shoreland management rules, as well as administrative language not in rule but in the previous model ordinance that helps to clarify and administer provisions in the ordinance. Any performance or dimensional standards that provide clarity on topics not sufficiently addressed in rule or reflect a higher standard than the minimum in rule are identified as optional in the commentary column and shown in blue bola. Higher standards may be additions to or deletions to the rules. Contents 1.0 STA TUTOR Y A UTHORIZA TION AND POLICY 1 2.0 GENERAL PROVISIONS AND DEFINITIONS 1 3.0 ADMINISTRATION 9 4.0 SHORELAND CLASSIFICATION SYSTEM AND LAND USES 11 5.0 SPECIAL LAND USE PROVISIONS 15 6.0 DIMENSIONAL AND GENERAL PERFORMANCE STANDARDS 17 7.0 PERFORMANCE STANDARDS FOR PUBLIC AND PRIVATE FACILITIES 25 8.0 VEGETATION AND LAND ALTERATIONS 26 9.0 SUBDIVISION/PLATTING PROVISIONS 30 10.0 PLANNED UNIT DEVELOPMENTS (PODS) 31 Revised 1/9/2017 Ordinance Language Commentary 1.0 STATUTORY AUTHORIZATION AND POLICY 1.1 Statutory Authorization. This shoreland ordinance is adopted pursuant to the authorization and policies contained in Minnesota Statutes, Chapter 103F, Minnesota Regulations, Parts 6120.2500 - 6120.3900, and the planning and zoning enabling legislation in Minnesota Statutes, Chapter 394 (for counties) or Chapter 462 (for municipalities). 1.2 Policy. The Legislature of Minnesota has delegated responsibility to local governments of the state to regulate the subdivision, use and development of the shorelands of public waters and thus preserve and enhance the quality of surface waters, conserve the economic and natural environmental values of shorelands, and provide for the wise use of waters and related land resources. This responsibility is hereby recognized by (insert name of Community). 2.0 GENERAL PROVISIONS AND DEFINITIONS 2.1. Optional provision for cities that have extra- 2.1 Jurisdiction. The provisions of this ordinance apply to the shorelands of the public water bodies as classified in territorial zoning authority. Section 4.1 of this ordinance, and to the shorelands of public water bodies greater than 10 acres in unincorporated areas in which the city has, by ordinance, extended the application of its zoning regulations as provided by Minnesota Statute, Chapter 462.357 Subd 1. Pursuant to Minnesota Regulations, Parts 6120.2500 - 6120.3900, no lake, pond, or flowage less than 10 acres in size in municipalities or 25 acres in size in unincorporated areas need be regulated in a local government's shoreland regulations. A body of water created by a private user where there was no previous shoreland may, at the discretion of the governing body, be exempt from this ordinance. 2.2 Enforcement. The (insert name of local government or designated official) is responsible for the administration 2.2 —2.4. If these provisions are already and enforcement of this ordinance. Any violation of the provisions of this ordinance or failure to comply with any included in the zoning ordinance, they are not of its requirements (including violations of conditions and safeguards established in connection with grants of needed. variances or conditional uses constitutes a misdemeanor and is punishable as defined by law. Violations of this ordinance can occur regardless of whether or not a permit is required for a regulated activity listed in Section 3.2 of this ordinance. 2.3 Severability. If any section, clause, provision, or portion of this ordinance is adjudged unconstitutional or invalid by a court of competent jurisdiction, the remainder of this ordinance shall not be affected thereby. 2.4 Abrogation and Greater Restrictions. It is not intended by this ordinance to repeal, abrogate, or impair any existing easements, covenants, or deed restrictions. However, where this ordinance imposes greater restrictions, the provisions of this ordinance shall prevail. All other ordinances inconsistent with this ordinance are hereby repealed to the extent of the inconsistency only. 2.5. These definitions are the minimum 2.5 Definitions. Unless specifically defined below, words or phrases used in this ordinance shall be interpreted to necessary for a compliant ordinance. Some give them the same meaning they have in common usage and to give this ordinance its most reasonable definitions may not be needed if a given feature Revised 1/9/2017 Ordinance Language Commentary application. For the purpose of this ordinance, the words "must" and "shall" are mandatory and not permissive. or land use is not present or not allowed in the All distances, unless otherwise specified, are measured horizontally. community. 2.511 Accessory structure or facility. Any building or improvement subordinate to a principal use. 2.512 Animal feedlot. A facility as defined by Minnesota Rules, part 7020.0300. 2.513 Bluff. A topographic feature such as a hill, cliff, or embankment having the following characteristics: 2.513. The DNR's bluff mapping tool, a GIS A. Part or all of the feature is located in a shoreland area; script, is available upon request from your Area B. The slope rises at least 25 feet above the toe of bluff; Hydrologist and will soon be available for download from our website. This tool is helpful C. The grade of the slope from the toe of the bluff to a point 25 feet or more above the toe of the bluff for identifying bluffs for general mapping and averages 30 percent or greater, except that an area with an average slope of less than 18 percent planning purposes. over a distance of at least 50 feet shall not be considered part of the bluff; and D. The slope must drain toward the waterbody. Bluff, Bluff Impact Zone, Top and Toe of Bluff �I I h Bluff impact zone i I I i I I i I I 20ft .. 50 ft � I I i I I I-� 30 ft --------------7 >30% average slope Setback Top of bluff AND >25 ft from top i Uppermost 50 ft of bluff i Segment with slope Toe of averaging >18% bluff or i OHWL --- -- Water i I i- Bluff 2.514 Bluff impact zone. A bluff and land located within 20 feet of the top of a bluff. Revised 1/9/2017 Ordinance Language Commentary 2.515 Bluff, Toe of. The lower point of a 50 -foot segment with an average slope exceeding 18 percent or the ordinary high water level, whichever is higher. 2.516 Bluff, Top of. For the purposes of measuring setbacks, the higher point of a 50 -foot segment with an average slope exceeding 18 percent. 2.517 Boathouse. A facility as defined by Minnesota Statutes Section 103G.245. 2.518 Buffer. A vegetative feature as defined by Minnesota Statutes Section 103F.48. 2.519 Building line. A line parallel to a lot line or the ordinary high water level at the required setback beyond which a structure may not extend. 2.520 Controlled access lot. A lot used to access public waters or as a recreation area for owners of nonriparian lots within the same subdivision containing the controlled access lot. 2.521 Commercial planned unit developments. Developments that provide transient, short-term lodging spaces, rooms, or parcels and their operations are essentially service-oriented. For example, hotel/motel accommodations, resorts, recreational vehicle and camping parks, and other primarily service-oriented activities are commercial planned unit developments. 2.522 Commercial use. The principal use of land or buildings for the sale, lease, rental, or trade of products, goods, and services. 2.523 Commissioner. The commissioner of the Department of Natural Resources. 2.524 Conditional use. A land use or development as defined by ordinance that would not be appropriate generally but may be allowed with appropriate restrictions upon a finding that certain conditions as detailed in the zoning ordinance exist, the use or development conforms to the comprehensive land use plan of the community, and the use is compatible with the existing neighborhood. 2.525 Deck. A horizontal, unenclosed platform with or without attached railings, seats, trellises, or other features, attached or functionally related to a principal use or site and at any point extending more than three feet above ground. 2.526 Duplex, triplex, and quad. A dwelling structure on a single lot, having two, three, and four units, respectively, attached by common walls and each unit equipped with separate sleeping, cooking, eating, living, and sanitation facilities. 2.527 Dwelling site. A designated location for residential use by one or more persons using temporary or movable shelter, including camping and recreational vehicle sites. 2.528 Dwelling unit. Any structure or portion of a structure, or other shelter designed as short- or long-term living quarters for one or more persons, including rental or timeshare accommodations such as motel, hotel, and resort rooms and cabins. Revised 1/9/2017 Ordinance Language Commentary 2.529 Extractive use. The use of land for surface or subsurface removal of sand, gravel, rock, industrial minerals, other nonmetallic minerals, and peat not regulated under Minnesota Statutes, Sections 93.44 to 93.51. 2.530 Forest land conversion. The clear cutting of forested lands to prepare for a new land use other than reestablishment of a subsequent forest stand. 2.531 Guest cottage. A structure used as a dwelling unit that may contain sleeping spaces and kitchen and bathroom facilities in addition to those provided in the primary dwelling unit on a lot. 2.532 Height of building. The vertical distance between the highest adjoining ground level at the building or ten feet above the lowest adjoining ground level, whichever is lower, and the highest point of a flat roof or average height of the highest gable of a pitched or hipped roof. Height of Building Average height of highest gable of pitched or hipped roof NK --I :— kl[L0 \ -: Height of �p— Mbuilding Measurement taken from 1) Highest — — adjoining ground level, 00 OR 2) 10 ft 10 ft above Highest adjoining lowest adjoining ground ground level level, whichever is lower. Lowest adjoining ground level 2.533. Optional definition. An impervious 2.533 Impervious surface. A constructed hard surface that prevents or retards entry of water into the soil and causes water to run off the surface in greater quantities and at an increased rate of flow than prior to surface definition is not in rule, but is helpful for administering the required impervious surface development, including rooftops; decks; sidewalks; patios; swimming pools; parking lots; concrete, standards in Section 8.4 of this model. This asphalt, or gravel driveways; and other similar surfaces. definition was developed as part of the 2010 2.534 Industrial use. The use of land or buildings for the production, manufacture, warehousing, storage, or shoreland rule update project which, although transfer of goods, products, commodities, or other wholesale items. never adopted, many local governments found Revised 1/9/2017 Ordinance Language Commentary 2.535 Intensive vegetation clearing. The complete removal of trees or shrubs in a contiguous patch, strip, row, to be helpful. Gravel driveways are defined as or block. impervious since soils become compacted after use and impair infiltration of water, and they 2.536 Lot. A parcel of land designated by plat, metes and bounds, registered land survey, auditors plot, or other are often paved over by property owners accepted means and separated from other parcels or portions by said description for the purpose of sale, without need for a permit. lease, or separation. 2.537 Lot width. The minimum distance between: A. Side lot lines measured at the midpoint of the building line; and B. Side lot lines at the ordinary high water level, if applicable. Lot Width Building line {structure setback) Midpoint X X and Y must each be as long as the minimum lot width Y L70 OH W L Water 2.538 Metallic minerals and peat. "Metallic minerals and peat" has the meaning given under Minnesota Statutes, Sections 93.44 to 93.51. 2.539 Nonconformity. Any legal use, structure or parcel of land already in existence, recorded, or authorized before the adoption of official controls or amendments to those controls that would not have been permitted to become established under the terms of the official controls as now written. 2.540 Ordinary high water level. The boundary of public waters and wetlands, and shall be an elevation delineating the highest water level which has been maintained for a sufficient period of time to leave Revised 1/9/2017 Ordinance Language Commentary evidence upon the landscape, commonly that point where the natural vegetation changes from predominantly aquatic to predominantly terrestrial. For watercourses, the ordinary high water level is the elevation of the top of the bank of the channel. For reservoirs and flowages, the ordinary high water level is the operating elevation of the normal summer pool. 2.541 Planned unit development. A type of development characterized by a unified site design for a number of dwelling units or dwelling sites on a parcel, whether for sale, rent, or lease, and also usually involving clustering of these units or sites to provide areas of common open space, density increases, and a mix of structure types and land uses. These developments may be organized and operated as condominiums, time-share condominiums, cooperatives, full fee ownership, commercial enterprises, or any combination of these, or cluster subdivisions of dwelling units, residential condominiums, townhouses, apartment buildings, dwelling grounds, recreational vehicle parks, resorts, hotels, motels, and conversions of structures and land uses to these uses. 2.542 Public waters. Any water as defined in Minnesota Statutes, Section 103G.005, Subd. 15, 15a. 2.543 Residential planned unit development. A use where the nature of residency is nontransient and the major or primary focus of the development is not service-oriented. For example, residential apartments, manufactured home parks, time-share condominiums, townhouses, cooperatives, and full fee ownership residences would be considered as residential planned unit developments. To qualify as a residential planned unit development, a development must contain at least five dwelling units or sites. 2.544 Resort. "Resort" has the meaning in Minnesota Statute, Section 103F.227. 2.545 Semipublic use. The use of land by a private, nonprofit organization to provide a public service that is ordinarily open to some persons outside the regular constituency of the organization. 2.546 Setback. The minimum horizontal distance between a structure, sewage treatment system, or other facility and an ordinary high water level, sewage treatment system, top of a bluff, road, highway, property line, or other facility. 2.547 Sewage treatment system. "Sewage treatment system" has the meaning given under Minnesota Rules, part 7080.1100, Subp. 82. 2.548 Sewer system. Pipelines or conduits, pumping stations, and force main, and all other construction, devices, appliances, or appurtenances used for conducting sewage or industrial waste or other wastes to a point of ultimate disposal. Revised 1/9/2017 Ordinance Language Commentary 2.549 Shore impact zone. Land located between the ordinary high water level of a public water and a line parallel to it at a setback of 50 percent of the structure setback. Shore Impact Zone 2.550 Shoreland. "Shoreland" means land located within the following distances from public waters: A. 1,000 feet from the ordinary high water level of a lake, pond, or flowage; and B. 300 feet from a river or stream, or the landward extent of a floodplain designated by ordinance on a river or stream, whichever is greater. Definition of Shoreland Designated {mapped) floodplain r-Rlvff( `J 1,000 ft t Lake 300 ft h Shoreland 0 1,000 ft ti i OHWL i i 1 7 Revised 1/9/2017 EfSt acture 4` Structure setback Shore -- — — - --- — -- i impact zone )50% of structure 1` setback) GHVVL Water 2.550 Shoreland. "Shoreland" means land located within the following distances from public waters: A. 1,000 feet from the ordinary high water level of a lake, pond, or flowage; and B. 300 feet from a river or stream, or the landward extent of a floodplain designated by ordinance on a river or stream, whichever is greater. Definition of Shoreland Designated {mapped) floodplain r-Rlvff( `J 1,000 ft t Lake 300 ft h Shoreland 0 1,000 ft ti i OHWL i i 1 7 Revised 1/9/2017 Ordinance Language Commentary 2.551 Shore recreation facilities. Swimming areas, docks, watercraft mooring areas and launching ramps and other water recreation facilities. 2.552 Significant historic site. Any archaeological site, standing structure, or other property that meets the criteria for eligibility to the National Register of Historic Places or is listed in the State Register of Historic Sites, or is determined to be an unplatted cemetery that falls under the provisions of Minnesota Statutes, Section 307.08. A historic site meets these criteria if it is presently listed on either register or if it is determined to meet the qualifications for listing after review by the Minnesota state archaeologist or the director of the Minnesota Historical Society. All unplatted cemeteries are automatically considered to be significant historic sites. 2.553. Optional deletion. This is a difficult 2.553 Steep slope. definition to administer. Simplifying this site'sas peaFly suited due to slope steepness aAd the definition to include only average slopes over ava 12% will simplify administration and improve resource protection. SID w,.« available, steep slopes .s ., Lands having average slopes over 12 percent, as measured over horizontal distances of 50 feet or more, which are not bluffs. 2.554 Structure. Any building or appurtenance, including decks, except aerial or underground utility lines, such as sewer, electric, telephone, telegraph, gas lines, towers, poles, and other supporting facilities. 2.555 Subdivision. Land that is divided for the purpose of sale, rent, or lease, including planned unit developments. 2.556 Suitability analysis. An evaluation of land to determine if it is appropriate for the proposed use. The analysis considers factors relevant to the proposed use and may include the following features: susceptibility to flooding; existence of wetlands; soils, erosion potential; slope steepness; water supply, sewage treatment capabilities; water depth, depth to groundwater and bedrock, vegetation, near -shore aquatic conditions unsuitable for water-based recreation; fish and wildlife habitat; presence of significant historic sites; or any other relevant feature of the natural land. 2.557 Variance. "Variance" means the same as that defined in Minnesota Statutes, Section 394.27 Subd. 7 (for counties) or Section 462.357 Subd. 6 (2) (for municipalities). 2.558 Water -oriented accessory structure or facility. A small, above ground building or other improvement, 2.558. Optional addition. Local governments except stairways, fences, docks, and retaining walls, which, because of the relationship of its use to may consider saunas and patios as water - surface water , reasonably needs to be located closer to public waters than the normal structure setback. oriented accessory structures (WOAS). This may Examples of such structures and facilities include, watercraft and watercraft equipment storage help clarify administration. The treatment of patios, specifically, in the shore impact zone structures, gazebos, screen houses, fish houses, pump houses, saunas, patios, and detached decks. (SIZ) is a common source of confusion. As a Boathouses and boat storage structures given the meaning under Minnesota Statutes, Section 103G.245 WOAS, patios could be allowed in the SIZ and are not a water -oriented accessory structures. counted towards the size limitation of WOAS in Section 7.3. Revised 1/9/2017 Ordinance Language Commentary 2.559 Water -dependent use. The use of land for commercial, industrial, public or semi-public purposes, where access to and use of a public water is an integral part of the normal conduct of operation. Marinas, resorts, and restaurants with transient docking facilities are examples of commercial uses typically found in shoreland areas. 2.559 Wetland. "Wetland" has the meaning given under Minnesota Rule, part 8420.0111. 3.0 ADMINISTRATION 3.1 Purpose. The purpose of this Section is to identify administrative provisions to ensure the ordinance is administered consistent with its purpose. 3.2 Permits. 3.21 A permit is required for the construction of buildings or building additions (including construction of decks and signs), the installation and/or alteration of sewage treatment systems, and those grading and filling activities not exempted by Section 8.3 of this ordinance. 3.22 A certificate of compliance, consistent with Minnesota Rules Chapter 7082.0700 Subp. 3, is required whenever a permit or variance of any type is required for any improvement on or use of the property. A sewage treatment system shall be considered compliant if the only deficiency is the system's improper setback from the ordinary high water level. 3.3 Application materials. Application for permits and other zoning applications such as variances shall be made to the (insert designated official) on the forms provided. The application shall include the necessary information so that the (insert designated official) can evaluate how the application complies with the provisions of this ordinance. 3.4 Certificate of Zoning Compliance. The (insert designated official) shall issue a certificate of zoning compliance for each activity requiring a permit as specified in Section 3.2 of this ordinance. This certificate will specify that the use of land conforms to the requirements of this ordinance. Any use, arrangement, or construction at variance with that authorized by permit shall be deemed a violation of this ordinance and shall be punishable as provided in Section 2.2 of this ordinance. 3.5. The statutory criteria for evaluating 3.5 Variances. Variances may only be granted in accordance with Minnesota Statutes, Section 394.27 (for counties) variance applications are broad, one -size -fits - or Section 462.357 (for municipalities) and are subject to the following: all, for use with all variances. Variances to 3.51 A variance may not circumvent the general purposes and intent of this ordinance; and shoreland protection standards affect public waters, resources to be protected for all state 3.52 For properties with existing sewage treatment systems, a certificate of compliance, consistent with residents. Because of the special status of these Minnesota Rules Chapter 7082.0700 Subp. 3, is required for variance approval. A sewage treatment waters, communities may want to establish system shall be considered compliant if the only deficiency is the system's improper setback from the special criteria for evaluating shoreland ordinary high water level. variances to ensure variances do not adversely affect public water resources. Revised 1/9/2017 Ordinance Language Commentary 3.6 Conditional Uses. All conditional uses in the shoreland area are subject to a thorough evaluation of the waterbody and the topographic, vegetation, and soil conditions to ensure: 3.61 The prevention of soil erosion or other possible pollution of public waters, both during and after construction; 3.62 The visibility of structures and other facilities as viewed form public waters is limited; 3.63 There is adequate water supply and on-site sewage treatment; and 3.64 The types, uses, and numbers of watercraft that the project will generate are compatible in relation to the suitability of public waters to safely accommodate these watercraft. 3.7 Mitigation. 3.71 In evaluating all variances, conditional uses, zoning and building permit applications, the zoning authority 3.71. This language is consistent with shall require the property owner to address, when appropriate, the following conditions, when related to Minnesota Statute, sections 394.27 (counties) and proportional to the impact, to meet the purpose of this ordinance, to protect adjacent properties, and 462.357 (municipalities). and the public interest: A. Advanced storm water runoff management treatment; B. Reducing impervious surfaces; C. Increasing setbacks from the ordinary high water level; D. Restoration of wetlands; E. Limiting vegetation removal and/or riparian vegetation restoration; F. Provisions for the location, design, and use of structures, sewage treatment systems, water supply systems, watercraft launching and docking areas, and parking areas; and G. Other conditions the zoning authority deems necessary. 3.72 In evaluating plans to construct sewage treatment systems, roads, driveways, structures, or other improvements on steep slopes, conditions 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 shall be attached to permits. 3.8 Nonconformities. 3.81 All legally established nonconformities as of the date of this ordinance may continue, but will be managed according to Minnesota Statutes, Sections 394.36 Subd. 5 (for counties) and 462.357 Subd. 1e (for cities) and other regulations of this community for alterations and additions; repair after damage; discontinuance of use; and intensification of use. 10 Revised 1/9/2017 Ordinance Language Commentary 3.82 All additions or expansions to the outside dimensions of an existing nonconforming structure must meet 3.82. Consistent with Minnesota Statutes, the setback, height, and other requirements of Sections 5.0 to 8.0 of this ordinance. Any deviation from sections 394.36, Subd. 4 (counties) and 462.357, these requirements must be authorized by a variance. Subd. 1e (municipalities). 3.9 Notifications to the Department of Natural Resources. 3.9. DNR's preferred notification method is via email to the appropriate DNR Area Hydrologist. 3.91 All notices of public hearings to consider variances, ordinance amendments, or conditional uses under 3.91. Optional. Local governments can provide shoreland management controls must be sent to the commissioner or the commissioner's designated earlier notification (more than 10 days prior to representative at least Eew thirty days before the hearings. Notices of hearings to consider proposed hearings) in their ordinances. Early engagement subdivisions/plats must include copies of the subdivision/plat. and notification to the DNR is mutually 3.92 All approved ordinance amendments and subdivisions/plats, and final decisions approving variances or beneficial; it provides DNR with sufficient time conditional uses under local shoreland management controls must be sent to the commissioner or the to complete a review and make an approval decision prior to public hearings, thus commissioner's designated representative and postmarked within ten days of final action. When a minimizing delays in the local government's variance is approved after the Department of Natural Resources has formally recommended denial in the adoption schedule. hearing record, the notification of the approved variance shall also include the summary of the public record/testimony and the findings of facts and conclusions which supported the issuance of the variance. 3.93 Any request to change the shoreland management classification of public waters within (insert local 3.93. Reclassifications require a formal request government name) must be sent to the commissioner or the commissioner's designated representative and are usually only approved to correct an error in the original classification. Provisions for for approval, and must include a resolution and supporting data as required by Minnesota Rules, part implementation flexibility (6120.2800, Subp. 3), 6120.3000, subp.4. rather than reclassification, may be used for 3.94 Any request to reduce the boundaries of shorelands of public waters within (insert local government requesting changes in standards for certain name) must be sent to the commissioner or the commissioner's designated representative for approval areas. Local governments may also adopt and must include a resolution and supporting data The boundaries of shorelands may be reduced when special protection classifications, a useful the shoreland of water bodies with different classifications overlap. In these cases, the topographic divide approach for applying higher standards around between the water bodies shall be used for adjusting the boundaries. waters in need of greater protection. 3.10 Mandatory EAW. An Environmental Assessment Worksheet consistent with Minnesota Rules, Chapter 4410 3.10. Mandatory EAWs are required for many must be prepared for projects meeting the thresholds of Minnesota Rules, part 4410.4300, Subparts 19a, 20a, 25, projects in shorelands. In most cases, the local 27, 28, 29, and 36a. government is the Responsible Government Unit (RGU) for completing the EA W. 4.0 SHORELAND CLASSIFICATION SYSTEM AND LAND USES 4.1. The ordinance must list all public water 4.1 shoreland Classification System. shoreland within the community's jurisdiction 4.11 Purpose. To ensure that shoreland development on the public waters of (insert local government name) including public waters not in the jurisdiction is regulated consistent with the classifications assigned by the commissioner under Minnesota Rules, part but with surrounding shoreland that is in the 6120.3300. jurisdiction. 4.12. Optional provision. It is helpful to show the 4.12 The shoreland area for the waterbodies listed in Sections 4.13 to 4.15 are defined in Section 2.550 and shoreland areas for lakes and rivers on the are shown on the Official Zoning Map. zoning map along with their classifications. 11 Revised 1/9/2017 Ordinance La 4.13 Lakes are classified as follows: Lake Classification DNR Public Waters I.D. # General Development (Insert legal description) (Insert lake name) (Insert DNR Public Waters I. D. #) (Insert lake name) (Insert DNR Public Waters I. D. #) Recreational Development (Insert river/stream name) (Insert lake name) (Insert DNR Public Waters I. D. #) (Insert lake name) (Insert DNR Public Waters I. D. #) Natural Environment (Insert legal description) (Insert lake name) (Insert DNR Public Waters I. D. #) (Insert lake name) (Insert DNR Public Waters I. D. #) 4.14 Rivers and Streams are classified as follows: River and Stream Classification Legal Description Urban (Insert river/stream name) (Insert legal description) (Insert river/stream name) (Insert legal description) Agricultural (Insert river/stream name) (Insert legal description) (Insert river/stream name) (Insert legal description) Transition (Insert river/stream name) (Insert legal description) (Insert river/stream name) (Insert legal description) Forested (Insert river/stream name) (Insert legal description) (Insert river/stream name) (Insert legal description) Remote (Insert river/stream name) (Insert legal description) (Insert river/stream name) (Insert legal description) 4.15 All public rivers and streams shown on the Public Waters Inventory Map for (insert name of county), a copy of which is adopted by reference, not given a classification in Section 4.14 shall be considered "Tributary." Commentary 4.13. Cities must list lakes that are 10 or more acres, and counties 25 or more acres (Minnesota Rules, part 6120.2500, Subp. 13). Cities that annex land or townships that incorporate with lakes that are 10 acres or more must amend their ordinances to include those lakes. List lakes along with the DNR public waters ID number. 4.14. List river names here along with township, range and section number of the river reach. Optional. Communities with sensitive shorelines or waters that are at risk to degradation due to nonpoint source nutrient pollution may designate those waters (lakes and rivers) with a special protection classification and regulate the shoreland of those waters with more restrictive development standards such as lot area, setback, riparian buffers, etc. 4.15. Instead of this provision, local governments may list all tributaries in the table in Section 4.14. This is a practical alternative if the number of Tributaries is relatively small. 12 Revised 1/9/2017 Ordinance Language Commentary 4.2 Land Uses. 4.21 Purpose. To identify land uses that are compatible with the protection and preservation of shoreline resources in order to conserve the economic and environmental values of shoreland and sustain water quality. 4.22 Shoreland district land uses listed in Sections 4.23 and 4.24 are regulated as: A. Permitted uses (P). These uses are allowed, provided all standards in this ordinance are followed; B. Conditional uses (C). These uses are allowed through a conditional use permit. The use must be evaluated according to the criteria in Section 3.6 of this ordinance and any additional conditions listed in this ordinance; and C. Not permitted uses (N). These uses are prohibited. 4.23 Land uses for lake classifications: Land Uses General Development Recreational Development Natural Environment Single residential P P P Duplex, triplex, quad residential P P C Residential PUD C C C Water -dependent commercial - As accessory to a residential planned unit development C C C Commercial P P C Commercial PUD - Limited expansion of a commercial planned unit development involving up to six additional dwelling units or sites may be allowed as a permitted use provided the provisions of Section 10.0 of this ordinance are satisfied. C C C Parks & historic sites C C C Public, semipublic P P C Industrial C C N Agricultural: cropland and pasture P P P Agricultural feedlots - New N N N 4.22. Land uses in the shoreland district are listed as permitted, not permitted, or conditional for each water body classification. Land uses for each lake classification are in Section 4.23, and uses for each river classification are in 4.24. Local governments may further clarify if the listed 'permitted" uses are allowed with or without a permit. Uses listed as "conditional" require a Conditional Use Permit (CUP). Underlying zoning should be consistent with these uses to alleviate potential confusion. New feedlots are prohibited in shorelands per Minnesota Rules, part 7020. 13 Revised 1/9/2017 Ordinance Language Commentary Agricultural feedlots - Expansion or resumption of existing C C C New feedlots are prohibited in shorelands per Minnesota Rules, part 7020. Forest management P P P Forest land conversion C C C Extractive use C C C Mining of metallic minerals and peat P P P 4.24 Land uses for river and stream classifications: Land Uses Remote Forested Transition Agriculture Urban Tributary Single residential P P P P P P Duplex, triplex, quad residential C P P P P P Residential PUD C C C C C C Water-dependent commercial - As accessory to a residential planned unit development C C C C C C Commercial C C C C P P Commercial PUD - Limited expansion of a commercial PUDs involving up to six additional dwelling units or sites may be allowed as a permitted use provided the provisions of Section 10.0 of this ordinance are satisfied. C C C C C C Parks & historic sites C C C C C C Public, semipublic C C C C P P Industrial N C N N C C Agricultural: cropland and pasture P P P P P P Agricultural feedlots - New N N N N N N Agricultural feedlots - Expansion or resumption of existing C C C C C C 14 Revised 1/9/2017 Ordinance Language Commentary Forest management P P P P P P 5.0. This section lists land uses for which special Forest land conversion C C C C C C Extractive use C C C C C C Mining of metallic minerals and peat P P P P P P 5.0 SPECIAL LAND USE PROVISIONS development standards apply. Note that some 5.1 Commercial, Industrial, Public, and Semipublic Use Standards. of these uses are conditional uses and must be 5.11 Water -dependent uses may be located on parcels or lots with frontage on public waters provided that: processed with a conditional use permit. A. The use complies with provisions of Section 7.0; B. The use is designed to incorporate topographic and vegetative screening of parking areas and structures; C. Uses that require short-term watercraft mooring for patrons must centralize these facilities and design them to avoid obstructions of navigation and to be the minimum size necessary to meet the need; and 5.11.D. This provision was modified from rules D. Uses that depend on patrons arriving by watercraft may use signs and lighting, provided that: for consistency with the Supreme Court decision in Reed vs Town of Gilbert regarding the first (1) Signs placed in or on public waters must only convey directional information or safety messages amendment and signage. and may only be placed by a public authority or under a permit issued by the county sheriff; and (2) Signs placed within the shore impact zone are: (a) No higher than ten feet above the ground, and no greater than 32 square feet in size; and (b) If illuminated by artificial lights, the lights must be shielded or directed to prevent illumination across public waters; and (3) Other lighting may be located within the shore impact zone or over public waters if it is used to illuminate potential safety hazards and is shielded or otherwise directed to prevent direct illumination across public waters. This does not preclude use of navigational lights. 5.12 Commercial, industrial, public, and semi-public uses that are not water -dependent must be located on lots or parcels without public waters frontage, or, if located on lots or parcels with public waters frontage, must either be set back double the ordinary high water level setback or be substantially screened from view from the water by vegetation or topography, assuming summer, leaf -on conditions. 15 Revised 1/9/2017 Ordinance Language Commentary 5.2 Agriculture Use Standards. 5.21 Buffers. A. General cultivation farming, grazing, nurseries, horticulture, truck farming, sod farming, and wild crop harvesting are permitted uses if steep slopes and shore and bluff impact zones are maintained in perennial 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 Natural Resource Conservation Service, as provided by a qualified individual or agency. 5.21.8. The DNR will consider a 50 foot average, B. The shore impact zone for parcels with permitted agricultural land uses is equal to a line parallel to 30 foot minimum buffer consistent with and 50 feet from the ordinary high water level. Minnesota Statutes, section 103F.48 as being consistent with the 50 foot minimum 5.22 New animal feedlots are not allowed in shoreland. Modifications or expansions to existing feedlots or requirement in 6120.3300, Subp. 7. Contact resumption of old feedlots are conditional uses and must meet the following standards: your DNR Area Hydrologist for more information. A. Feedlots must be designed consistent with Minnesota Rules, Chapter 7020; B. Feedlots must not further encroach into the existing ordinary high water level setback or the bluff impact zone and must not expand to a capacity of 1,000 animal units or more; and, C. Old feedlots not currently in operation may resume operation consistent with Minnesota Statutes, Section 116.0711. 5.3 Forest Management Standards. 5.31 The harvesting of timber and associated reforestation must be conducted consistent with the applicable provisions of the Sustaining Minnesota Forest Resources: Voluntary Site -Level Forest Management Guidelines for Landowners, Loggers and Resource Managers. 5.32 Intensive vegetation clearing for forest land conversion to another use is a conditional use subject to an erosion control and sedimentation plan developed and approved by the soil and water conservation district. 5.4 Extractive Use Standards. Extractive uses are conditional uses and must meet the following standards: 5.41. Site Development and Restoration Plan. A site development and restoration plan must be developed, approved, and followed over the course of operation. The plan must: A. Address dust, noise, possible pollutant discharges, hours and duration of operation, and anticipated vegetation and topographic alterations; B. Identify actions to be taken during operation to mitigate adverse environmental impacts, particularly erosion; and 16 Revised 1/9/2017 Ordinance Language Commentary C. Clearly explain how the site will be rehabilitated after extractive activities end. 5.42 Setbacks for Processing Machinery. Processing machinery must meet structure setback standards from ordinary high water levels and from bluffs. 5.5 Metallic Mining Standards. Mining of metallic minerals and peat is a permitted use provided the provisions of Minnesota Statutes, Sections 93.44 to 93.51, are satisfied. 6.0 DIMENSIONAL AND GENERAL PERFORMANCE STANDARDS 6.1 Purpose. To establish dimensional and performance standards that protect shoreland resources from impacts of development. 6.2 Lot Area and Width Standards. After the effective date of this ordinance, all new lots must meet the minimum lot area and lot width requirements in Sections 6.25 and 6.26, subject to the following standards: 6.21 Only lands above the ordinary high water level can be used to meet lot area and width standards; 6.22 Lot width standards must be met at both the ordinary high water level and at the building line; 6.23 The sewer lot area dimensions can only be used if publicly owned sewer system service is available to the property; 6.24 Residential subdivisions with dwelling unit densities exceeding those in Sections 6.25 and 6.26 are allowed only if designed and approved as residential PUDs under Section 10.0 of this ordinance; and 6.25. Local governments may want to require 6.25 Lake Minimum Lot Area and Width Standards: larger lot area and width standards than those listed. Larger lots reduce density and risk of General Development — No Sewer surface water use overcrowding and preserve lakeshore character. Larger lots also reduce the Riparian Nonriparian amount of development and impervious surfaces along sensitive shorelines providing Lot Area (sf) Lot Width (ft) Lot Area (sf) Lot Width (ft) protection to waters sensitive to nutrient Single 20,000 100 40,000 150 pollution. Duplex 40,000 180 80,000 265 Triplex 60,000 260 120,000 375 Quad 80,000 340 160,000 490 General Development — Sewer Riparian Nonriparian Lot Area (sf) Lot Width (ft) Lot Area (sf) Lot Width (ft) 17 Revised 1/9/2017 Ordinance Language Commentary Single 15,000 75 10,000 75 Duplex 26,000 135 17,500 135 Triplex 38,000 195 25,000 190 Quad 49,000 255 32,500 245 Recreational Development — No Sewer Riparian Nonriparian Lot Area (sf) Lot Width (ft) Lot Area (sf) Lot Width (ft) Single 40,000 150 40,000 150 Duplex 80,000 225 80,000 265 Triplex 120,000 300 120,000 375 Quad 160,000 375 160,000 490 Recreational Development — Sewer Riparian Nonriparian Lot Area (sf) Lot Width (ft) Lot Area (sf) Lot Width (ft) Single 20,000 75 15,000 75 Duplex 35,000 135 26,000 135 Triplex 50,000 195 38,000 190 Quad 65,000 255 49,000 245 Natural Environment — No Sewer Riparian Nonriparian Lot Area (sf) Lot Width (ft) Lot Area (sf) Lot Width (ft) Single 80,000 200 80,000 200 Duplex 120,000 300 160,000 400 18 Revised 1/9/2017 Ordinance Language I Commentary Triplex 160,000 Quad 200,000 Natural Environment — Sewer 400 240,000 600 500 320,000 800 Nonriparian Lot Area (sf) Lot Width (ft) 20,000 125 35,000 220 52,000 315 65,000 410 6.26. Local governments may want to establish minimum lot area requirements and require 6.26 River/Stream Minimum Lot Width Standards. There are no minimum lot area requirements for rivers and larger lot width and area standards than those streams. The lot width standards in feet are: listed. Riparian Forested Lot Area (sf) Lot Width (ft) Single 40,000 125 Duplex 70,000 225 Triplex 100,000 325 Quad 130,000 425 Nonriparian Lot Area (sf) Lot Width (ft) 20,000 125 35,000 220 52,000 315 65,000 410 6.26. Local governments may want to establish minimum lot area requirements and require 6.26 River/Stream Minimum Lot Width Standards. There are no minimum lot area requirements for rivers and larger lot width and area standards than those streams. The lot width standards in feet are: listed. 6.3 Special Residential Lot Provisions. 6.31 Subdivisions of duplexes, triplexes, and quads are conditional uses on Natural Environment Lakes and must also meet the following standards: A. Each building must be set back at least 200 feet from the ordinary high water level; B. Each building must have common sewage treatment and water systems in one location and serve all dwelling units in the building; 19 Revised 1/9/2017 Remote Forested Transition Agricultural Urban & Tributary No Sewer Sewer Single 300 200 250 150 100 75 Duplex 450 300 375 225 150 115 Triplex 600 400 500 300 200 150 Quad 750 500 625 375 250 190 6.3 Special Residential Lot Provisions. 6.31 Subdivisions of duplexes, triplexes, and quads are conditional uses on Natural Environment Lakes and must also meet the following standards: A. Each building must be set back at least 200 feet from the ordinary high water level; B. Each building must have common sewage treatment and water systems in one location and serve all dwelling units in the building; 19 Revised 1/9/2017 Ordinance Language I Commentary C. Watercraft docking facilities for each lot must be centralized in one location and serve all dwelling units in the building; and D. No more than 25 percent of a lake's shoreline can be in duplex, triplex, or quad developments. 6.32. One guest cottage may be allowed on lots meeting or exceeding the duplex lot area and width dimensions presented in Sections 6.25 and 6.26, provided the following standards are met: A. For lots exceeding the minimum lot dimensions of duplex lots, the guest cottage must be located within an area equal to the smallest duplex -sized lot that could be created including the principal dwelling unit; B. A guest cottage must not cover more than 700 square feet of land surface and must not exceed 15 feet in height; and C. A guest cottage must be located or designed to reduce its visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks or color, assuming summer leaf - on conditions. 6.33 Controlled access lots are permissible if created as part of a subdivision and in compliance with the following standards: A. The lot must meet the area and width requirements for residential lots, and be suitable for the intended uses of controlled access lots as provided in item D; B. If docking, mooring, or over -water storage of more than six (6) watercraft is to be allowed at a controlled access lot, then the width of the lot (keeping the same lot depth) must be increased by a percentage of the requirements for riparian residential lots for each watercraft beyond six, consistent with the following table: Controlled Access Lot Frontage Requirements Ratio of lake size to shore length (acres/mile) Required percent increase in frontage Less than 100 25% 100-200 20% 201-300 15% 301-400 10% Greater than 400 5% 6.33. Controlled access lots are only allowed if created at the time of subdivision. Creation of access easements on riparian lots to allow access to the water are not permitted. Communities concerned about overcrowding of surface waters may choose to prohibit controlled access lots. 20 Revised 1/9/2017 Ordinance Language I Commentary C. The lot must be jointly owned by all purchasers of lots in the subdivision or by all purchasers of nonriparian lots in the subdivision who are provided riparian access rights on the access lot; and D. Covenants or other equally effective legal instruments must be developed that: (1) Specify which lot owners have authority to use the access lot; (2) Identify what activities are allowed. The activities may include watercraft launching, loading, storage, beaching, mooring, docking, swimming, sunbathing, or picnicking; (3) Limit the total number of vehicles allowed to be parked and the total number of watercraft allowed to be continuously moored, docked, or stored over water; (4) Require centralization of all common facilities and activities in the most suitable locations on the lot to minimize topographic and vegetation alterations; and (5) Require all parking areas, storage buildings, and other facilities to be screened by vegetation or topography as much as practical from view from the public water, assuming summer, leaf -on conditions. 6.4 Placement, Height, and Design of Structures. 6.41 Placement of Structures and Sewage Treatment Systems on Lots. When more than one setback applies to a site, structures and facilities must be located to meet all setbacks, and comply with the following provisions: Classification Structures Sewage Treatment System No Sewer Sewer Lakes Natural Environment 150 150 150 Recreational Development 100 75 75 General Development 75 50 50 Rivers and Streams Remote 200 200 150 Forested and Transition 150 150 100 Agriculture, Urban and Tributary 100 50 75 6.4. Local governments may apply stricter standards than those listed here. Increasing structure setbacks can help reduce the risk of erosion in near shore areas and enhance the aesthetic character of lakes and shorelands. Larger setbacks also allow room for larger riparian buffers. Increasing septic system setbacks increases reduces the risk of subsurface effluent reaching surface waters. 6.41.A. Optional language. Keeping impervious surfaces away from the riparian edge is 21 Revised 1/9/2017 Ordinance Language Commentary A. OHWL Setbacks. Structures, impervious surfaces, and sewage treatment systems must meet the important for reducing the risk of erosion in the following setbacks from the Ordinary High Water Level (OHWL), except that one water -oriented near shore area and nutrient loading into accessory structure or facility, designed in accordance with Section 7.3 of this ordinance, may be set surface waters due to runoff. Section 7.3 of this back a minimum distance of ten (10) feet from the OHWL: ordinance allows for some exceptions for impervious surfaces in the near shore area. B. Setback averaging. 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 OHWL, provided the proposed structure is not located in a shore impact zone or in a bluff impact zone; Structure Setback Averaging Existing structure X / — Shore impact zone OHWL Proposed 1 structure 1 Structure setback --- X+Y=2 Existing structure C. Setbacks of decks. Deck additions may be allowed without a variance to a structure not meeting the required setback from the ordinary high water level if all of the following criteria are met: (1) The structure existed on the date the structure setbacks were established; (2) A thorough evaluation of the property and structure reveals no reasonable location for a deck meeting or exceeding the existing ordinary high water level setback of the structure; (3) The deck encroachment toward the ordinary high water level does not exceed 15 percent of the existing setback of the structure from the ordinary high water level or is no closer than 30 feet from the OHWL, whichever is more restrictive; and (4) The deck is constructed primarily of wood, and is not roofed or screened. 6.41. C. Optional. Local governments may choose to exclude this provision from their ordinance. 22 Revised 1/9/2017 Ordinance Language I Commentary D. Additional structure setbacks. Structures must also meet the following setbacks, regardless of the waterbody classification: Setback from: Deck Encroachment Top of bluff 30 Unplatted cemetery Deck additions Right-of-way line of federal, state, or county highway 50 for pre-existing 20 structures may further encroach Existing prior to into the setback shoreland up to 30 ft toward controls the shore or 15% of the Structure structure setback, setback Deck or pati© whichever IS more restrictive. Shore Impact zone OHWL Water D. Additional structure setbacks. Structures must also meet the following setbacks, regardless of the waterbody classification: Setback from: Setback (ft) Top of bluff 30 Unplatted cemetery 50 Right-of-way line of federal, state, or county highway 50 Right-of-way line of town road, public street, or other roads not classified 20 E. Bluff Impact Zones. Structures, impervious surfaces, and accessory facilities, except stairways and landings, must not be placed within bluff impact zones. 6.42 Height of Structures. All structures in residential districts, except churches and nonresidential agricultural structures, must not exceed 25 feet in height. 6.43 Lowest Floor Elevation. Structures must 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 flood -proofed must be determined as follows: 6.41. D. Local governments may apply stricter standards than those listed. The presence of permeable soils on top of bedrock, combined with steep slopes or bluffs, can increase risk of septic effluent leakage out the sides of slopes or bluffs. Establishing septic system setbacks from the top of bluffs can reduce this risk. 6.41. E. Optional. Keeping impervious surfaces out of the bluff impact zone is important for reducing the risk of slope erosion and failure and nutrient loading into surface waters due to runoff. 6.43. These provisions apply to areas where there are no mapped floodplains or floodplain studies for determining elevations. 23 Revised 1/9/2017 Ordinance Language Commentary A. For lakes, by placing the lowest floor at a level at least three feet above the highest known water level, or three feet above the ordinary high water level, whichever is higher; B. For rivers and streams, by placing the lowest floor at least three feet above the highest known flood elevation. If data are not available, by placing the lowest floor at least three feet above the ordinary high water level, or by conducting a technical evaluation to determine effects of proposed construction upon flood stages and flood flows and to establish a flood protection elevation. Under all three approaches, technical evaluations must be done by a qualified engineer or hydrologist consistent with Minnesota Rules, parts 6120.5000 to 6120.6200 governing the management of flood plain areas. If more than one approach is used, the highest flood protection elevation determined must be used for placing structures and other facilities; and C. If the structure is floodproofed instead of elevated under items A and B above, then it must be floodproofed in accordance with Minnesota Rules, part 6120.5900 Subp. 3 (D). Lowest Floor Elevation 3 ft above OHWL wa �p or highest known water level OHWL or highest a a known water level Lowest floor Water elevation 6.44 Significant Historic Sites. No structure may be placed on a significant historic 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. 6.5 Water Supply and Sewage Treatment. 6.51 Water supply. Any public or private supply of water for domestic purposes must meet or exceed standards for water quality of the Minnesota Department of Health and the Minnesota Pollution Control Agency. 6.52 Sewage treatment. Any premises used for human occupancy must be connected to a publicly -owned sewer system, where available or comply with Minnesota Rules, Chapters 7080 — 7081. 24 Revised 1/9/2017 Ordinance Language Commentary 7.0 PERFORMANCE STANDARDS FOR PUBLIC AND PRIVATE FACILITIES 7.1 Placement and Design of Roads, Driveways, and Parking Areas. Public and private roads and parking areas must be designed to take advantage of natural vegetation and topography to achieve maximum screening as viewed from public waters and comply with the following standards: 7.11 Roads, driveways, and parking areas must meet structure setbacks and must 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 must be designed to minimize adverse impacts; 7.12 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 subpart are met; 7.13 Private facilities must comply with the grading and filling provisions of Section 8.3 of this ordinance; and 7.14 For public roads, driveways and parking areas, documentation must be provided by a qualified individual that they 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. 7.2 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. Stairways, lifts, and landings must meet the following design requirements: 7.21 Stairways and lifts must not exceed four feet in width on residential lots. Wider stairways may be used for commercial properties, public recreational uses, and planned unit developments; 7.22 Landings for stairways and lifts on residential lots must not exceed 32 square feet in area. Landings larger than 32 square feet may be used for commercial properties, public -space recreational uses, and planned unit developments; 7.23 Canopies or roofs are not allowed on stairways, lifts, or landings; 7.24 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; 7.25 Stairways, lifts, and landings must 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 7.26 Facilities such as ramps, lifts, or mobility paths for physically handicapped persons are also allowed for achieving access to shore areas, if they are consistent with the dimensional and performance standards of subitems 7.21 to 7.25 and the requirements of Minnesota Rules, Chapter 1341. 25 Revised 1/9/2017 Ordinance Language Commentary 7.3 Water-oriented Accessory Structures or Facilities. Each lot may have one water-oriented accessory structure or facility if it complies with the following provisions: 7.31. Optional. Including 'patios" as a water- oriented accessory structure (WOAS) or facility 7.31 The structure or facility must not exceed ten feet in height, exclusive of safety rails, and cannot occupy an makes patios subject to the limitations of this area greater than 250 square feet. The structure or facility may include patios or detached decks not provision. This helps to simplify administration exceeding eight feet above grade at any point; and limit the amount of impervious surfaces 7.32 The structure or facility is not in the Bluff Impact Zone; within the shore impact zone. 'Patios" should only be included here if they are also included in 7.33 The setback of the structure or facility from the ordinary high water level must be at least ten feet; the definition of WOAS in Section 2.558. 7.34 The structure is not a boathouse or boat storage structure as defined under Minnesota Statutes, Section 103G.245; 7.35 The structure or facility must 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; 7.36 The roof may be used as an open-air deck with safety rails, but must not be enclosed or used as a storage area; 7.37 The structure or facility must not be designed or used for human habitation and must not contain water supply or sewage treatment facilities; 7.38 As an alternative for general development and recreational development waterbodies, water-oriented accessory structures used solely for storage of watercraft and boating-related equipment may occupy an area up to 400 square feet provided the maximum width of the structure is 20 feet as measured parallel to the shoreline; and 7.39 Water-oriented accessory structures may have the lowest floor placed lower than the elevation specified in Section 6.43 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. 8.0. These standards prohibit or limit vegetation removal in specified areas. These are difficult to 8.0 VEGETATION AND LAND ALTERATIONS administer and enforce, and once vegetation has been removed there are no requirements to 8.1 Purpose. Alterations of vegetation and topography are regulated to prevent erosion into public waters, fix restore it. Communities concerned about the nutrients, preserve shoreland aesthetics, preserve historic values, prevent bank slumping, sustain water quality, loss of riparian vegetation and habit, erosion and protect fish and wildlife habitat. control and aesthetics may consider requiring a 8.2 Vegetation Management. permit for vegetation removal, and/or establishing a requirement to maintain a 8.21 Removal or alteration of vegetation must comply with the provisions of this subsection except for: riparian buffer. Such a maintenance standard could include provisions for required A. Vegetation alteration necessary for the construction of structures and sewage treatment systems width/depth and vegetation type as well as under validly issued permits for these facilities; allowances for views and recreational areas. 26 Revised 1/9/2017 Ordinance Language Commentary B. The construction of public roads and parking areas if consistent with Section 7.1 of this ordinance; C. Forest management uses consistent with Section 5.3 of this ordinance; and D. Agricultural uses consistent with Section 5.2 of this ordinance. 8.22 Intensive vegetation clearing in the shore and bluff impact zones and on steep slopes is prohibited. Intensive clearing outside of these areas is allowed if consistent with the forest management standards in 8.23C and D. Optional. These standards provide Section 5.3 of this ordinance. additional addional guidance and practices that enhance habitat and protect water quality. 8.23 Limited clearing and trimming of trees and shrubs in the shore and bluff impact zones and on steep slopes, is allowed to provide a view to the water from the principal dwelling 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, is not substantially reduced; B. Existing shading of water surfaces along rivers is preserved; C. Cutting debris or slash shall be scattered and not mounded on the ground; and D. Perennial ground cover is retained. 8.24 Removal of trees, limbs, or branches that are dead, diseased, dying, or pose safety hazards is allowed without a permit. 8.25 Fertilizer and pesticide runoff into surface waters must be minimized through use of vegetation, topography or both. 8.3 Grading and Filling. 8.31 Grading and filling activities must comply with the provisions of this subsection except for the 8.32.8. Note that Minnesota Rules, part construction of public roads and parking areas if consistent with Section 7.1 of this ordinance. 4410.4300, Subp. 36a provides thresholds for mandatory EA Ws for certain land conversions 8.32 Permit Requirements. and alterations in shoreland. The local A. Grading, filling and excavations necessary for the construction of structures and sewage treatment government is the Responsible Government Unit systems, if part of an approved permit, do not require a separate grading and filling permit. However, (RGU) unless otherwise specified. the standards in Section 8.33 of this ordinance must be incorporated into the permit. B. For all other work, a grading and filling permit is 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 27 Revised 1/9/2017 Ordinance Language Commentary (2) the movement of more than 50 cubic yards of material outside of steep slopes and shore and 8.33. LGUs may reference their erosion and bluff impact zones. sediment control BMPs instead of using these (if similar). 8.33 Grading, filling and excavation activities must meet the following standards: A. Grading or filling of any wetland must meet or exceed the wetland protection standards under Minnesota Rules, Chapter 8420 and any other permits, reviews, or approvals by other local state, or federal agencies such as watershed districts, the DNR or US Army Corps of Engineers; B. Land alterations must be designed and implemented to minimize the amount of erosion and sediment from entering surface waters during and after construction consistently by: (1) Limiting the amount and time of bare ground exposure; (2) Using temporary ground covers such as mulches or similar materials; (3) Establishing permanent vegetation cover as soon as possible; (4) Using sediment traps, vegetated buffer strips or other appropriate techniques; (5) Stabilizing altered areas to acceptable erosion control standards consistent with the field office technical guides of the soil and water conservation district; (6) Not placing fill or excavated material in a manner that creates unstable slopes. Plans to place fill or excavated material on steep slopes must be reviewed by qualified professionals for continued slope stability and must not create finished slopes of 30 percent or greater; (7) Fill or excavated material must not be placed in bluff impact zones; (8) Any alterations below the ordinary high water level of public waters must first be authorized by the commissioner under Minnesota Statutes, Section 103G; (9) Alterations of topography are only allowed if they are accessory to permitted or conditional uses and do not adversely affect adjacent or nearby properties; and (10) Placement of natural rock riprap, including associated grading of the shoreline and placement of a filter blanket, is permitted if: (a) the finished slope does not exceed three feet horizontal to one foot vertical; (b) the landward extent of the riprap is within ten feet of the ordinary high water level; and (c) the height of the riprap above the ordinary high water level does not exceed three feet. 28 Revised 1/9/2017 Ordinance Language Commentary Riprap Guidelines Above OHWL: get local r :, i °; rl government unit permit —--————— — — — — —— <3 ft --- -- above OHWL OHWL f/ <10 ft horizontal -- distance from OHWL Water Filter 1 3 8.34. DNR permits for public water excavations Finished slope below OHWL must be less than a 1:3 ratio require that the local government have a DNR - approved shoreland zoning ordinance 8.34 Connections to public waters. Excavations to connect boat slips, canals, lagoons, and harbors to public (Minnesota Statute, Section 103G.245) as a waters require a public waters permit and must comply with Minnesota Rules, Chapter 6115. condition of a public water permit approval. The DNR may deny a permit for public waters 8.4 Stormwater Management. excavations if there is no shoreland ordinance or 8.41 General Standards: if the current ordinance is not consistent with the ordinance the DNR has approved. A. When possible, existing natural drainageways, and vegetated soil surfaces must be used to convey, store, filter, and retain stormwater runoff before discharge to public waters. B. Development must be planned and conducted in a manner that will minimize the extent of disturbed areas, runoff velocities, erosion potential, and reduce and delay runoff volumes. Disturbed areas must be stabilized as soon as possible and appropriate facilities or methods used to retain sediment on the site. C. When development density, topography, soils, and vegetation are not sufficient to adequately handle stormwater runoff, constructed facilities such as settling basins, skimming devices, dikes, waterways, ponds and infiltration may be used. Preference must be given to surface drainage, vegetation, and infiltration rather than buried pipes and man-made materials and facilities. 8.42.A. Local governments may reduce the 8.42 Specific Standards: maximum amount of impervious surface allowed. Reducing the amount of allowed A. Impervious surfaces of lots must not exceed 25 percent of the lot area. impervious surface will reduce the runoff B. When constructed facilities are used for stormwater management, documentation must be provided volume and rate reducing the risk of erosion by a qualified individual that they are designed and installed consistent with the field office technical and nutrient loading into surface waters. guide of the local soil and water conservation district or the Minnesota Stormwater Manual, as Requiring a lower minimum (15% or 20Y.) only on new lots avoids the creation of applicable. nonconformities. 29 Revised 1/9/2017 Ordinance Language Commentary C. New constructed stormwater outfalls to public waters must be consistent with Minnesota Rules, part 6115.0231. 9.0 SUBDIVISION/PLATTING PROVISIONS 9.1 Purpose. To ensure that new development minimizes impacts to shoreland resources and is safe and functional. 9.2 Land suitability. Each lot created through subdivision, including planned unit developments authorized under Section 10.0 of this ordinance, must be suitable in its natural state for the proposed use with minimal alteration A suitability analysis must be conducted for each proposed subdivision, including planned unit developments, to determine if the subdivision is suitable in its natural state for the proposed use with minimal alteration and whether any feature of the land is likely to be harmful to the health, safety, or welfare of future residents of the proposed subdivision or of the community. 9.3 Consistency with other controls. Subdivisions and each lot in a subdivision shall meet all official controls so that a variance is not needed later to use the lots for their intended purpose. 9.4 Water and Sewer Design Standards. 9.41 A potable water supply and a sewage treatment system consistent with Minnesota Rules, Chapters 7080 — 7081 must be provided for every lot. 9.42 Each lot must include at least two soil treatment and dispersal areas that support systems described in Minnesota Rules, parts 7080.2200 to 7080.223 or site conditions described in part 7081.0270, subparts 3 to 7, as applicable. 9.43 Lots that would require use of holding tanks are prohibited. 9.51. In addition to paper based topographic 9.5 Information requirements. information, MnTOPO is a web -based application for viewing, printing and 9.51 Topographic contours at ten -foot intervals or less from United States Geological Survey maps or more downloading high-resolution elevation data. It current sources, showing limiting site characteristics; can also be used to generate elevation profiles for locating bluffs, watershed boundaries or 9.52 The surface water features required in Minnesota Statutes, section 505.021, Subd. 1, to be shown on other topographical features of interest. plats, obtained from United States Geological Survey quadrangle topographic maps or more current sources; 9.53 Adequate soils information to determine suitability for building and sewage treatment capabilities for every lot from the most current existing sources or from field investigations such as soil borings, percolation tests, or other methods; 9.54 Information regarding adequacy of domestic water supply; extent of anticipated vegetation and topographic alterations; near -shore aquatic conditions, including depths, types of bottom sediments, and aquatic vegetation; and proposed methods for controlling stormwater runoff and erosion, both during and after construction activities; 30 Revised 1/9/2017 Ordinance Language Commentary 9.55 Location of 100-year flood plain areas and floodway districts from existing adopted maps or data; and 9.56 A line or contour representing the ordinary high water level, the "toe" and the "top" of bluffs, and the minimum building setback distances from the top of the bluff and the lake or stream. 9.6 Dedications. When a land or easement dedication is a condition of subdivision approval, the approval must 9.7. Optional. "Cumulatively" is recommended provide easements over natural drainage or ponding areas for management of stormwater and significant to close a loophole where a parcel is subdivided wetlands. at different times, each time creating fewer 9.7 Platting. All subdivisions that cumulatively create five or more lots or parcels that are 2-1/2 acres or less in size than 5 parcels to avoid the requirement to plat. shall be processed as a plat in accordance with Minnesota Statutes, Chapter 505. No permit for construction of Both Minnesota Statutes, sections 462 and 394 "orderly" say official controls are to provide for buildings or sewage treatment systems shall be issued for lots created after the adoption of this ordinance unless development. Applying this provision the lot was previously approved as part of a formal subdivision. cumulatively to parcels supports this purpose. 9.8 Controlled Access Lots. Controlled access lots within a subdivision must meet or exceed the lot size criteria in 10.0 Shoreland PUDs require a conditional use Section 6.33 of this ordinance. permit (CUP) and are best thought of as a conditional use to allow higher density in 10.0 PLANNED UNIT DEVELOPMENTS (PUDs) shoreland areas. Provisions in this section are conditions of approval that are required to 10.1 Purpose. To protect and enhance the natural and scenic qualities of shoreland areas during and after approve a Shoreland PUD (CUP) and cannot be development and redevelopment of high density residential and commercial uses. weakened through the negotiation process of a 10.2 Types of PUDs Permissible. Planned unit developments (PUDs) are allowed for new projects on undeveloped local government's general PUD ordinance. land, redevelopment of previously built sites, or conversions of existing buildings and land. Deviation from the Section 4.2 allows PUDs as a conditional use minimum lot size standards of Section 6.2 of this ordinance is allowed if the standards in this Section are met. with required conditions of approval in this section. 10.3 Processing of PUDs. Planned unit developments must be processed as a conditional use. An expansion to an existing commercial PUD involving 6 or less new dwelling units or sites since the date this ordinance was adopted Note that Minnesota Rules, part 6120.3800, is permissible as a permitted use provided the total project density does not exceed the allowable densities Subp. 1 gives the DNR authority to review PUDs calculated in the project density evaluation procedures in Section 10.5. Approval cannot occur until all applicable in shoreland for compliance with state rules if environmental reviews are complete. the local government does not have DNR- approved shoreland PUD provisions in its 10.4 Application for a PUD. The applicant for a PUD must submit the following documents prior to final action on the ordinance. In this case, the ordinance should application request: have a provision that states "The DNR must 10.41 Site plan and/or plat showing: approve all PUDs located in shorelands." A. Locations of property boundaries; B. Surface water features; C. Existing and proposed structures and other facilities; D. Land alterations; E. Sewage treatment and water supply systems (where public systems will not be provided); 31 Revised 1/9/2017 Ordinance Language I Commentary F. Topographic contours at ten -foot intervals or less; and G. Identification of buildings and portions of the project that are residential, commercial, or a combination of the two (if project combines commercial and residential elements). 10.42 A property owners association agreement (for residential PUD's) with mandatory membership, and consistent with Section 10.6 of this ordinance. 10.43 Deed restrictions, covenants, permanent easements or other instruments that: A. Address future vegetative and topographic alterations, construction of additional buildings, beaching of watercraft, and construction of commercial buildings in residential PUDs; and B. Ensure the long-term preservation and maintenance of open space in accordance with the criteria and analysis specified in Section 10.6 of this ordinance. 10.44 A master plan/site plan describing the project and showing floor plans for all commercial structures. 10.45 Additional documents necessary to explain how the PUD will be designed and will function. 10.5 Density Determination. Proposed new or expansions to existing planned unit developments must be evaluated using the following procedures. 10.51 Step 1. Identify Density Analysis Tiers. Divide the project parcel into tiers by drawing one or more lines parallel to the ordinary high water level at the following intervals, proceeding landward: Classification Tier Depth No Sewer (ft) Sewer (ft) General Development Lakes — 1st tier 200 200 General Development Lakes — all other tiers 267 200 Recreational Development Lakes 267 267 Natural Environment Lakes 400 320 All Rivers 300 300 10.52 Step 2. Calculate Suitable Area for Development. Calculate the suitable area within each tier by excluding all wetlands, bluffs, or land below the ordinary high water level of public waters. 10.53 Step 3. Determine Base Density: 10.53.A. For LGUs that have specified a minimum lot area for river lots, the process for 32 Revised 1/9/2017 Ordinance Language Commentary A. For residential PUDs, divide the suitable area within each tier by the minimum single residential lot determining base density for lakes and rivers area for lakes to determine the allowable number of dwelling units, or base density, for each tier. For will be the same — tier area divided by lot area. rivers, if a minimum lot area is not specified, divide the tier width by the minimum single residential lot width. B. For commercial PUDs: (1) Determine the average area for each dwelling unit or dwelling site within each tier. Include both existing and proposed dwelling units and sites in the calculation. (a) For dwelling units, determine the average inside living floor area of dwelling units in each tier: For average floor area less than 200 sf, use 200 sf. II. For average floor area greater than 1,500 sf, use 1,500 sf. (b) For dwelling sites (campgrounds), determine the area of each dwelling site as follows: For manufactured homes, use the area of the manufactured home, if known, otherwise use 1,000 sf. II. For recreational vehicles, campers or tents, use 400 sf. (2) Select the appropriate floor area/dwelling site area ratio from the following table for the floor area or dwelling site area determined in Section10.53 B. 1. Inside Floor Area/Dwelling Site Area Ratio Living Floor General Development General Development Natural Environment Area or Lakes w/Sewer — all tiers Lakes w/no sewer — all Lakes Dwellingother General Development tiers Remote Rivers Site Lakes w/no sewer —11' Recreational Area (sf) tier Development Lakes Agricultural, Urban and Forested and Transition Tributary Rivers Rivers 200 .040 .020 .010 300 .048 .024 .012 400 .056 .028 .014 500 .065 .032 .016 33 Revised 1/9/2017 Ordinance Language Commentary 600 .072 .038 .019 700 .082 .042 .021 800 .091 .046 .023 900 .099 .050 .025 1,000 .108 .054 .027 1,100 .116 .058 .029 1,200 .125 .064 .032 1,300 .133 .068 .034 1,400 .142 .072 .036 1,500 .150 .075 .038 (3) Multiply the suitable area within each tier determined in Section 10.52 by the floor area or dwelling site area ratio to yield the total floor area or dwelling site area for each tier to be used for dwelling units or dwelling sites. (4) Divide the total floor area or dwelling site area for each tier calculated in Section 10.53 B. 3 by the average inside living floor area for dwelling units or dwelling site area determined in 10.53 B 1. This yields the allowable number of dwelling units or dwelling sites, or base density, for each tier. C. Allowable densities may be transferred from any tier to any other tier further from the waterbody, but must not be transferred to any tier closer to the waterbody. D. All PUDs with densities at or below the base density must meet the design standards in Section 10.6 10.54. This provision, from rule, allows very high densities leading to overcrowding of surface 10.54 Step 4. Determine if the Site can Accommodate Increased Density: waters and increases the risk to phosphorus A. The following increases to the dwelling unit or dwelling site base densities determined Section 10.53 sensitive lakes and sensitive shoreline areas. Even without this density bonus provision, the are allowed if the design criteria in Section 10.6 of this ordinance are satisfied as well as the Shoreland PUD provisions provide potential for standards in Section 10.54, item B: greater density over standard lot and block Shoreland Tier Maximum density increase subdivisions due to design flexibility of not within each tier (percent) requiring a minimum lot size. Local governments concerned about overuse of 15k 50 surface waters, degradation of water quality, compatibility with adjacent development, and 2nd 100 overall community character should evaluate 34 Revised 1/9/2017 Ordinance Language Commentary 3rd 200 whether the density allowed by these provisions is in alignment with the community's vision. 4t" 200 5th 200 B. Structure setbacks from the ordinary high water level: (1) Are increased to at least 50 percent greater than the minimum setback; or (2) The impact on the waterbody is reduced an equivalent amount through vegetative management, topography, or additional acceptable means and the setback is at least 25 percent greater than the minimum setback. 10.6 Design Criteria. All PUDs must meet the following design criteria. 10.61 General Design Standards. A. All residential planned unit developments must contain at least five dwelling units or sites. B. On-site water supply and sewage treatment systems must be centralized and meet the standards in Section 6.5 of this ordinance. Sewage treatment systems must meet the setback standards of Section 6.41, item A of this ordinance. C. Dwelling units or dwelling sites must be clustered into one or more groups and located on suitable areas of the development. D. Dwelling units or dwelling sites must be designed and located to meet the dimensional standards in Sections 6.3 and 6.4: E. Shore recreation facilities: (1) Must be centralized and located in areas suitable for them based on a suitability analysis. (2) The number of spaces provided for continuous beaching, mooring, or docking of watercraft must not exceed one for each allowable dwelling unit or site in the first tier (notwithstanding existing mooring sites in an existing commercially used harbor). (3) Launching ramp facilities, including a small dock for loading and unloading equipment, may be provided for use by occupants of dwelling units or sites located in other tiers. F. Structures, parking areas, and other facilities must be treated to reduce visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks, color, or other 35 Revised 1/9/2017 Ordinance Language Commentary means acceptable to the local unit of government, assuming summer, leaf -on conditions. Vegetative and topographic screening must be preserved, if existing, or may be required to be provided. G. Accessory structures and facilities, except water oriented accessory structures, must meet the required structure setback and must be centralized. H. Water -oriented accessory structures and facilities may be allowed if they meet or exceed design standards contained in Section 7.3 of this ordinance and are centralized. 10.62. Open space provides significant 10.62 Open Space Requirements. ecological, recreational, and economic benefits. A. Open space must constitute at least 50 percent of the total project area and must include: Local governments may want to add additional specifications for its design and maintenance. (1) Areas with physical characteristics unsuitable for development in their natural state; This could include specifying the amount and type of native vegetation, its long-term (2) Areas containing significant historic sites or unplatted cemeteries; maintenance, and connectivity to adjacent (3) Portions of the shore impact zone preserved in its natural or existing state as follows: natural areas. Other options include limiting the amount of open space that may be used for (a) For existing residential PUD's, at least 50 percent of the shore impact zone high intensity recreational areas (trails, playgrounds, etc.), stormwater and sewage (b) For new residential PUDs, at least 70 percent of the shore impact zone. treatment etc. (c) For all commercial PUD's, at least 50 percent of the shore impact zone. B. Open space may include: (1) Outdoor recreational facilities for use by owners of dwelling units or sites, by guests staying in commercial dwelling units or sites, and by the general public; and (2) Subsurface sewage treatment systems if the use of the space is restricted to avoid adverse impacts on the systems. C. Open space shall not include: (1) Dwelling units or sites and residential lots; road rights-of-way, or land covered by road surfaces; 10.62.C.(1). Optional. "Dwelling units" and parking areas, land below the OHWL of public waters, or structures, except water -oriented "dwelling sites" are defined in Section 2. Note accessory structures or facilities; and that dwelling sites are not the some as lots. Thus, the area of a residential lot not covered by (2) Commercial facilities or uses. a dwelling unit or structure can be included as open space. Privately owned residential "open 10.63 Open Space Maintenance and Administration Requirements. space" is very difficult to manage and maintain for ecological benefits. Communities concerned A. Open space preservation. The appearance of open space areas, including topography, vegetation, About developing and maintaining valuable and allowable uses, must be preserved and maintained by use of deed restrictions, covenants, habitat and water quality through open space preservation or about the ability to "administer" protection of open space on residential lots, 36 Revised 1/9/2017 Ordinance Language Commentary permanent easements, public dedication, or other equally effective and permanent means The may choose to add "residential lots" or replace instruments must prohibit: "dwelling units" with "residential lots." (1) Commercial uses (for residential PUD's); 10.62.C.(1) has also been modified to clarify (2) Vegetation and topographic alterations other than routine maintenance; that open space cannot include land below the OHWL of public waters. Use of the water above (3) Construction of additional buildings or storage of vehicles and other materials; and this land is already a 'public" open space. The purpose of the open space is to set-aside and (4) Uncontrolled beaching of watercraft. permanently protect private land for recreation, habitat and water quality purposes and to B. Development organization and functioning. Unless an equally effective alternative community offset higher development densities allowed. framework is established, all residential planned unit developments must use an owners association with the following features: (1) Membership must be mandatory for each dwelling unit or dwelling site owner and any successive owner; (2) Each member must pay a pro rata share of the association's expenses, and unpaid assessments can become liens on units or dwelling sites; (3) Assessments must be adjustable to accommodate changing conditions; and (4) The association must be responsible for insurance, taxes, and maintenance of all commonly owned property and facilities. 10.64 Erosion Control and Stormwater Management. A. Erosion control plans must be developed and must be consistent with the provisions of Section 8.3 of this ordinance. Erosion control plans approved by a soil and water conservation district may be required if project size and site physical characteristics warrant. B. Stormwater management facilities must be designed and constructed to manage expected quantities and qualities of stormwater runoff. For commercial PUDs, impervious surfaces within any tier must not exceed 25 percent of the tier area, except that 35 percent impervious surface coverage may be allowed in the first tier of general development lakes with an approved stormwater management plan and consistency with Section 8.0 of this ordinance. 10.7 Conversions. Local governments may allow existing resorts or other land uses and facilities to be converted to residential PUDs if all of the following standards are met: 10.71 Proposed conversions must be evaluated using the same procedures for residential PUDs involving new construction. Inconsistencies between existing features of the development and these standards must be identified; 37 Revised 1/9/2017 Ordinance Language Commentary 10.72 Deficiencies involving water supply and sewage treatment, structure color, impervious coverage, open space, and shore recreation facilities must be corrected as part of the conversion or as specified in the conditional use permit; 10.73 Shore and bluff impact zone deficiencies must be evaluated and reasonable improvements made as part of the conversion. These improvements must include, where applicable, the following: A. Removal of extraneous buildings, docks, or other facilities that no longer need to be located in shore or bluff impact zones; B. Remedial measures to correct erosion, improve vegetative cover and improve screening of buildings and other facilities as viewed from the water; and C. Conditions attached to existing dwelling units located in shore or bluff impact zones that preclude exterior expansions in any dimension or substantial alterations. The conditions must also provide for future relocation of dwelling units, where feasible, to other locations, meeting all setback and elevation requirements when they are rebuilt or replaced. 10.74 Existing dwelling unit or dwelling site densities that exceed standards in Section 10.5 of this ordinance may be allowed to continue but must not be allowed to be increased, either at the time of conversion or in the future. Efforts must be made during the conversion to limit impacts of high densities by requiring seasonal use, improving vegetative screening, centralizing shore recreation facilities, installing new sewage treatment systems, or other means. 38 Revised 1/9/2017