Agenda - Council Work Session - 10/17/2023 - Special

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1 2. Be designed and constructed to effectively manage reasonably expected 2 quantities and qualities of stormwater runoff. Impervious surface coverage 3 within any tier must not exceed 25 percent of the tier area, except that for 4 commercial PUDs 35 percent impervious surface coverage may be allowed in the 5 first tier of general development lakes with an approved stormwater 6 management plan and consistency with this subdivision. 7 d. Centralization and design of facilities. Centralization and design of facilities and 8 structures must be done according to the following standards: 9 1. Planned unit developments must be connected to publicly owned water supply 10 and sewer systems, if available. On-site water supply and sewage treatment 11 systems must be centralized and designed and installed to meet or exceed 12 applicable standards or rules of the state department of health and this 13 subdivision. On-site sewage treatment systems must be located on the most 14 suitable areas of the development,and sufficient lawn area free of limiting factors 15 must be provided for a replacement soil treatment system for each sewage 16 syste m; 17 2. Dwelling units or sites must be clustered into one or more groups and located on 18 suitable areas of the development. They must be designed and located to meet 19 or exceed the following dimensional standards for the relevant shoreland 20 classification: setback from the ordinary high water level, elevation above the 21 surface water features, and maximum height. Setbacks from the ordinary high 22 water level must be increased in accordance with this subdivision for 23 developments with density increases; 24 3. Shore recreation facilities, including but not limited to swimming areas, docks, 25 and watercraft mooring areas and launching ramps, must be centralized and 26 located in areas suitable for them. Evaluation of suitability must include 27 consideration of land slope,water depth,vegetation,soils,depth to groundwater 28 and bedrock, or other relevant factors. The number of spaces provided for 29 continuous beaching, mooring, or docking of watercraft must not exceed one for 30 each allowable dwelling unit or site in the first tier (notwithstanding existing 31 mooring sites in an existing commercially used harbor). Launching ramp facilities, 32 including a small dock for loading and unloading equipment, may be provided for 33 use by occupants of dwelling units or sites located in other tiers; 34 4. Structures, parking areas, and other facilities must be treated to reduce visibility 35 as viewed from public waters and adjacent shorelands by vegetation,topography, 36 increased setbacks, color, or other means acceptable to the local unit of 37 government, assuming summer, leaf-on conditions. Vegetative and topographic 38 screening must be preserved, if existing,or may be required to be provided; 39 5. Accessory structures and facilities, except water oriented accessory structures, 40 must meet the required principal structure setback and must be centralized; and 41 6. Water-oriented accessory structures and facilities may be allowed if they meet or 42 exceed design standards contained in this subdivision and are centralized. 43 (5) Conversions. Local governments may allow existing resorts or other land uses and facilities to 44 be converted to residential planned unit developments if all of the following standards are 45 met: 46 a. Proposed conversions must be initially evaluated using the same procedures for 47 residential planned unit developments involving all new construction. Inconsistencies 48 between existing features of the development and these standards must be identified. Page 148 of 160