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Home My WebLink Aboutwetland info Orono, MN Code of Ordinances Page 1 of 3 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 shail 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 welis: Where no formal buffer exists and where 35 feet MCWD does not require a buffer Where a formal buffer exists or where 35 feet or established buffer width plus 10 MCWD buffer is required feet, whichever 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: about:blank 6/24/2015 Orono, MN,Code of Ordinances Page 2 of 3 Protection Susceptibility Description Additional Protection Classification Rating Requirements (B = Bounce = Change in water level due to runoff event) (P = Phosphorus) "Preserve" Highly Highly susceptible to both B: Maintain bounce at or Susceptible quantity and quality below existing conditions impacts from runoff; have P: Limit loadings to the highest degree of predevelopment loading protection (0.14 Lbs/Ac/Yr) "Manage 1" Moderately Moderately susceptible to B: Maintain bounce at or Susceptible quantity and quality below existing conditions impacts; protection is less plus 0.5 foot stringent than Preserve, P: Limit loadings to provides protection to predevelopment loadings maintain their times 2 (0.28 Lbs/Ac/Yr) characteristics "Manage 2" Slightly Less stringent protection B: Maintain bounce at or Susceptible than Manage 1 wetlands; below existing conditions maintenance of plus 1.0 foot characteristics is desirable P: Limit concentration to predevelopment concentrations (200 ppb) "Manage 3" Least Wetlands are significantly B: No quantity Susceptible degraded (e.g., cultivated requirement or canary grass monotype) P: Limit concentration to or lack of wetland 225 ppb characteristics; not typically impacted by runoff; no quantity and only limited quality treatment of runoff is required about:blank 6/24/2015 Orono, MN Code of Ordinances Page 3 of 3 ' ' ' The protection classification for each wetland will be found on the "Wetland Management Classification Map & List" which is hereby adopted by reference, a copy of which shall be kept on file in the office of the city clerk and shall be available for public review during all normal office hours.The Minnehaha Creek Watershed District required buffer area widths are based on the four protection classifications. 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