MMSD Storm Update Aug 9-10, 2025

The Milwaukee Metropolitan Sewerage District (MMSD) is reporting the following information (see 5-day letter) to the Wisconsin Department of Natural Resources regarding sewer overflows that occurred due to historic rainfall and flooding on August 9 through August 10, 2025.

Since 1995, MMSD has designed and constructed $585 million in flood management projects, including Lincoln Creek, County Grounds, Hart Park, Valley Park, and Pulaski Park, to name a few. All those projects provided levels of protection during the devastating storms that just occurred. Without those projects, damage in the region would have been much worse. MMSD has an additional $712 million in future flood management projects to get done, with significant work needed in the Kinnickinnic River Watershed, where there are 660 structures at high risk for flooding.