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3.3 City of Roseville One of the primary means for the City to manage surface water is through this plan which is legally enforceable through city ordinances and standards such as Shoreland, Wetland, Storm Water Management and Floodplain Regulations. City code chapters and sections relevant to surface water management have been included in Appendix C. In addition to City ordinances, Roseville enforces stormwater design standards through development review, building permits and erosion control permits. For example, currently, all sites that are greater than 10,000 square feet or land adjacent to a water resource are required to get an Erosion Control Permit. Further detail regarding design standards can be found in Appendix A. Enforcement of the City's ordinances and standards goes hand -in -hand with compliance with local, state, and federal regulations. Closely related to surface water management is the NPDES MS4 permit program. As of March 2003, all cities in the Twin Cities metropolitan area are permittees under the NPDES Phase II MS4 Storm Water permit and must therefore meet certain requirements related to stormwater pollution control. The six minimum control measures and associated BMPs of the NPDES MS4 program are included in the City's Storm Water Pollution Prevention Plan (SWPPP) found in Appendix D. 4.0 Goals and Policies Minnesota Rules, Part 8410.0170, subpart 5 (italics below), relating to Surface Water Management, requires local governrnents to establish goals and policies for the effective management of water resources. M.R. 8410.0170, Subpart 5. Establishment ofpolicies and goals (Local Plans). Each local (SWMP) plan must state specific goals and corresponding policies related to the purpose of these plans, be consistent with the policies and goals of the organization plans within the City or township, and address the relation of the local plan to the regional, state, and federal goals and programs outlined in Part 8410.0070. A goal is the specific end point which is desired and policies are guiding principles which altogether form a strategy to attain the goals. Plan standards (or storm water development criteria) are an extension of the goals and policies that provide detailed criteria on storm water management practices. This section of the CSWMP outlines goals and policies related specifically to surface water management in the City of Roseville. These goals and policies are a reflection of the City Council's desire to reach and sustain a high quality of life for the City's residents. 4.1 Flood Protection and Runoff Management Development and the related changes in land use can increase runoff rates and volumes due to additional impervious surface. As areas develop or redevelop at a higher density, storm water runoff generally increases. In addition, and as discussed briefly in Section 2.1, changes in the characteristics of rainfall events are trending toward more intense rainfall and greater depth storms. Whatever the cause, this increase in runoff rates and volumes can result in localized and/or large scale flooding issues in the downstream system. It is important to manage these increased runoff rates and volumes in order to ensure reduction of flooding in the downstream system and to control the potential effects of erosive flows on streams and waterways. As an established community with a developed built environment, Roseville has dealt with and continues to deal with numerous flooding issues as a result of development altering the Comprehensive Surface Water Management Plan ROSEV120222 City of Roseville Page 17