Minneapolis, MN Environmental Rules: Stormwater Management (2026)

City Code Chapter 54 requires anyone disturbing more than 0.5 acre of land, including phased or connected projects under one common plan of development, to get a stormwater management plan approved by the city engineer before starting work. Plans must hold peak discharge rates at or below existing conditions and capture and retain 1.1 inches of runoff on-site from new and reconstructed impervious surfaces, plus include an operations and maintenance plan for each best management practice (BMP). Single-family and duplex construction, mill-and-overlay resurfacing, and utility-only work restoring the surface are exempt. Installed BMPs require annual registration and are subject to inspection by the city engineer.