Loveland, CO Environmental Rules: Stormwater Management (2026)

LMC Chapter 13.20 implements Loveland's MS4 obligations under CDPHE Permit COR090000. The chapter prohibits illicit discharges (anything other than uncontaminated stormwater) into the city's storm sewer system, requires construction-phase Best Management Practices (BMPs) on every disturbed site, and requires Permanent Stormwater Quality Control Measures on larger sites. The trigger for a city Stormwater Quality Permit is land disturbance equal to or greater than one-half (1/2) acre, or any disturbance smaller than 1/2 acre that is part of a common plan of development that would disturb 1/2 acre or more in total. Sites of one (1) acre or more must additionally enroll in the State CDPS Stormwater Construction Permit administered by CDPHE under the Colorado Water Quality Control Act (C.R.S. 25-8). Temporary erosion and sediment control BMPs must follow the Mile High Flood District (formerly UDFCD) Urban Storm Drainage Criteria Manual Volume 3 Chapter 7 — silt fence, wattles, vehicle tracking control pads, inlet protection, concrete washouts, sediment traps, and dewatering structures are the standard toolkit. Permanent water quality measures (extended detention basins, sand filters, bioretention, grass swales) are sized to the city's water quality capture volume and reviewed during Development Review. The MS4 Permit contact is Kelly Leedy (970-962-2775); the Stormwater Manager is Chris Carlson (970-962-2774); the illicit discharge hotline is 970-962-2761 and the email is Stormwater@cityofloveland.org.