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4/16/2026 <br />2 <br />NPDES MS4 Permit <br />o Clean Water Act established the NPDES Permit Program <br />•U.S. Environmental Protection Agency <br />•Administered locally by the MPCA <br />o City of Gem Lake <br />•Phase II Small MS4 <br />•General Permit Coverage <br />•City maintains a Stormwater Pollution Prevention Plan (SWPPP) <br />•SWPPP is comprised of 6 Minimum Control Measures (MCM) and Best <br />Management Practices (BMP) <br />PROGRAM BACKGROUND <br />“A conveyance or system <br />of conveyances including <br />roads with drainage <br />systems, municipal streets, <br />catch basins, curbs, <br />gutters, ditches, man-made <br />channels, or storm drains” <br />Municipal Separate Storm Sewer System <br />PROGRAM BACKGROUND <br />3 <br />4