Rothschild, WI Environmental Rules: Stormwater Management (2026)

Chapter 590, Article IV regulates long-term stormwater separately from short-term construction erosion. Section 590-51 sets numeric performance standards for the stormwater management plan every post-construction site must implement: BMPs must reduce total suspended solids by 80% for new development, by 40% for redevelopment and for infill under five acres built within 10 years of October 1, 2002, and by 80% for infill built after that window, all measured against no controls at average annual rainfall. Peak discharge rates must be held at or below predevelopment levels for the 2-, 10- and 100-year, 24-hour design storms, and infiltration BMPs must capture 90% of predevelopment infiltration volume for residential sites and 60% for commercial, industrial and institutional sites, with narrower alternative percent-of-runoff tests available.

Protective, largely undevelopable buffers of 10 to 75 feet apply along the top of channel or wetland boundary depending on water type. Section 590-52 requires a post-construction runoff permit from the Administrator of Public Works before any land disturbing activity begins; the application needs the stormwater management plan, a maintenance agreement, and a nonrefundable permit administration fee, and the Administrator has 20 business days to approve or deny a complete application. The maintenance agreement must be recorded with the Marathon County Register of Deeds as a running deed restriction.

Enforcement under Section 590-57 covers this article: a certified-mail notice of violation, a stop-work order, permit revocation, and referral to the Village Attorney are all available before a court injunction is sought.