2014-01383 - addn/remodel/repair

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Orono, MN Code of Ordinances Page 1 of 2 Sec.78-1605.-Wetland buffer areas and setbacks. (a) This subsection establishes authority for wetland buffer areas around protected wetlands.Buffer areas are necessary and beneficial to maintain the health of wetlands.Buffer areas protect the edge of wetlands from erosion while filtering sediment,chemicals and other nutrients from runoff that drains into wetlands.Buffer areas can improve the biological diversity and health of a wetland environment while reducing the adverse impacts of human activities. (b) All wetlands within the City of Orono are within the Minnehaha Creek Watershed District(MCWD),which has rules and regulations for the establishment and maintenance of wetland buffers.In an effort to avoid overlapping or conflicting regulations,the city defers jurisdiction for the establishment and maintenance of wetland buffers to the Minnehaha Creek Watershed District.If application of MCWD buffer regulations is in conflict with city regulations,the more restrictive requirements shall apply. (c) In order to provide for a minimum level of wetland protection where Minnehaha Creek Watershed District buffer rules do not provide for adequate separation between wetlands and buildings or other structures or surfaces,the city shall require setbacks from the delineated edge of a protected wetland as follows: Minimum distance setback from delineated edge of wetland to any building(principal or accessory)or other structure, hardcover,septic systems or wells: Where no formal buffer exists and where MCWD does not 35 feet require a buffer Where a formal buffer exists or where MCWD buffer is 35 feet or established buffer width plus 10 feet,whichever required is greater Areas within the required setback area subject to filling,grading or excavation as part of a construction project shall be revegetated immediately upon completion of such earthwork.Setbacks must be verified with wetland delineation information.The determination of whether a Level 1 delineation or Level 2 delineation is required shall be at the discretion of the planning director.Level 2 delineation information shall be provided on a certified certificate of survey.The requirement for delineation shall be applied in cases where the wetland exists within 150 feet of the proposed project. (d) The City of Orono has established wetland protection strategies in the Orono Surface Water Management Plan(SWMP)(January 2011). A protection classification has been assigned to each wetland in Orono based on the stormwater susceptibility and functional assessment for each wetland.The city has also established additional protection requirements for each classification.The four protection classifications are described as follows: Protection Susceptibility Description Additional Protection Requirements Classification Rating (B=Bounce=Change in water level due to runoff event) (P= Phosphorus) "Preserve" Highly Highly susceptible to both quantity B: Maintain bounce at or below Susceptible and quality impacts from runoff;have existing conditions the highest degree of protection P: Limit loadings to predevelopment loading(0.14 Lbs/Ac/Yr) "Manage 1" Moderately Moderately susceptible to quantity B: Maintain bounce at or below Susceptible and quality impacts; protection is less existing conditions plus 0.5 foot stringent than Preserve,provides P: Limit loadings to predevelopment protection to maintain their loadings times 2(0.28 Lbs/Ac/Yr) characteristics "Manage 2" Slightly Less stringent protection than B: Maintain bounce at or below Susceptible Manage 1 wetlands; maintenance of existing conditions plus 1.0 foot characteristics is desirable P: Limit concentration to predevelopment concentrations(200 11 ppb) about:blank 12/18/2014