Agenda - Public Works Committee - 03/31/2015

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Updated Surface Water Management Plan (SWMP) City of Ramsey, Minnesota Policy 6.2: Recharge areas identified by Anoka County shall be protected from adverse development and from potential contamination. Policy 6.3: Infiltration of the first 1.0-inches of runoff from new impervious areas will be required wherever the soils are appropriately permeable (i.e., hydraulic soil types A and B) to promote groundwater recharge and volume controls. This is subject to proximity to wellhead protection zones as noted earlier in this report whereby infiltration shall not be allowed within the 10- year capture zone. Policy 6.4: Whenever practical, ponds shall be designed as "wet ponds" with storage volume below the outlet to promote infiltration and/or groundwater recharge. Policy 6.5: The use of grassed waterways shall be encouraged to maximize infiltration. Proper grades shall be maintained or underdrain systems installed as part of an overall site plan to insure positive drainage. Policy 6.6: Any spring area should be identified in the field, denoted on maps by the City and protected from development within the watershed. Policy 6.7: The appropriate jurisdiction shall use both regulatory (ordinances, permits, etc.) and non -regulatory (Best Management Practices) tools to protect the land area within designated wellhead protection areas. G. Wetlands Goal 7: Maintain the amount of wetland acreage and try to increase the wetland values within the watershed. Policy 7.1: Use and function of all wetlands greater than'/4-acre in size has been determined as part of the 2008 SWMP plan preparation. Policy 7.2: Restoration of poor quality wetlands shall be prioritized. Policy 7.3: The City or Anoka County shall identify areas that can be used for wetland mitigation. Policy 7.4: Wetland mitigation criteria will be established consistent with the Minnesota Wetland Conservation Act of 1991 and subsequent amendments and associated rules thereto (e.g., Minnesota Rule 8420), state and federal regulations, the LRRWMO and the needs of the City. Policy 7.5: Alteration of wetlands is discouraged unless for restoration. Alteration may be allowed on an individual basis if the alteration can be properly mitigated in accordance with the Wetland Conservation Act (WCA). Allowable alternatives must comply with WCA sequencing requirements including, in order, avoidance, minimization and mitigation. In general, it will Section V March 20, 2015 Page 43