The Mississippi River Winona/LaCrescent (WinLaC) Watershed is 480,000 acres in size and contains portions of 4 counties, Houston, Olmsted, Wabasha and Winona. Winona County comprises 283,200 acres, or 59% of the WinLaC Watershed.

Planning of the WinLaC One Watershed, One Plan (1W1P) began in September of 2020 and final approval of the WinLaC Comprehensive Watershed Management Plan (CWMP) occurred on March 22, 2023.