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Comprehensive Stormwater Management Plan Northeast Lino Lakes Drainage Improvement Project WSB Project No. 2929-79 Page 23 7 CSMP STORMWATER MANAGEMENT 7.1 Regional BMP Capacity Analysis Since the area is not fully developed, it is the goal of this CSMP to lay the framework for future developments within the City of Lino Lakes CSMP area to utilize the regional BMPs to meet the RCWD stormwater management requirements. Table7-1 summarizes the existing impervious surfaces and the proposed infiltration requirements based on the City of Lino Lakes’ Comprehensive Plan land uses (Figure 4, Appendix A) and applicable RCWD Rules at the time of development. The details of the water quality volume calculations can be found in Appendix E. Table 7-1. Maximum Impervious Area at Full Development Existing Impervious [ac] Proposed Impervious [ac] EAST 14.5 332.3 CENTRAL 22.0 317.3 WEST 1.69 56.8 TOTAL 38.1 706.4 As conceptually designed, the regional BMPs provide enough water quality volume to mitigate the proposed impervious surface per the requirements in the RCWD Rule C.6. 7.2 Operation and Maintenance The outlet control gates will be operated by the City of Lino Lakes and shall be placed to control the release of water from each regional storage facility. The gates will be operated by the City of Lino Lakes and shall be placed to control the release of water from each regional storage facility. Each gate must be closed when Peltier Lake reaches an elevation one foot below the 100-year flood elevation of 887.7 [NAVD88] on the rising limb of the lake stage hydrograph and remain closed until the flood elevation on Peltier Lake recedes below the 100-year flood elevation of 887.7, on the falling limb of the lake stage hydrograph. The City of Lino Lakes will maintain permanent easements for all regional stormwater facilities to perform routine and periodic maintenance activities as required by their MS4 permit.