Agenda - Environmental Policy Board - 03/02/2015

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Updated Storm Water Management Plan (SWMP) City of Ramsey, Minnesota 3. Maintain water level control structures Adequacy of Capital Improvement Programs The storm water improvements recommended in the City's 5 -year Capital Improvement Program are designed to address and correct problems related to: 1. Runoff Quantity 2. Water Quality Management 3. Fish and Wildlife Habitat and Public Waters and Wetland Management 4. Recreational Opportunities J. Future Potential Problems The greatest potential for future problems with storm water planning is associated with the ever-growing impervious footprint that is inevitable with growth. As stated earlier, highly pervious nature of the Anoka Sand Plain means that the cumulative effect of development could result in drastically increased runoff volume and flow rates. The recommended ordinance revisions are designed to: 1. Encourage infiltration and soil ripping of newly graded sites so that developed sites can adequately mimic unimproved site runoff and flow rates. 2. Limit post development runoff rates to 75 percent of the existing condition so that multiple developments do not cause cumulative increases in the downstream condition. In addition, regional pond modifications are also recommended where plausible because of the economic and runoff management capabilities of larger scale hydrologic systems. By implementing the recommendations in the SWMP, these potential future problems are being anticipated and adequately addressed within the City of Ramsey. As stated earlier, the City must rely on the regulatory authority of Anoka County, the LRRWMO and the regional, state, and federal agencies to monitor and control the runoff entering the city from outside its jurisdiction. The City understands that it will also need to address issues brought to the attention by these outside regulating authorities. Section VI February 20, 2015March 6, 2015 Page 52