1. The annual state required inspection of the Wonder Lake Dam and Sediment Drying Facility this fall has now been scheduled for October 2nd, 2025. 

2. The Nippersink Creek USGS stream gage at Thompson Road upstream of Wonder Lake recorded just under four inches of rain in the last month. The gage also showed the corresponding “spikes” in streamflow from the rainfall events, as shown below in the second chart. Nippersink streamflow into the lake today is at roughly 20 cubic feet per second (cfs), which is still below the 30-year average of 30 cfs for this date. 

3. Last Saturday night, Milwaukee received up to 13 inches of rain, causing significant flooding. Chicago has also had recent heavy rainfall events, and localized flooding. And of course, the devasting July floods in Texas caused a significant loss of life and property. These types of events typically occur when a storm cell “stalls” over a particular area, greatly increasing rainfall totals and flooding potential. A recent article, available here https://shorturl.at/J9sGl discusses the potential for these types of events increasing in the future, and the need for better emergency notification warnings. The MPOA is fortunate to have the Thompson Road stream gage data available 24/7 on the internet at: https://shorturl.at/Yi7nI 

4. As always, lakefront landowners are encouraged to take steps to ensure that their shoreline is properly stabilized. Properties having no shoreline protection in place, or those with failing stabilization practices, can be a significant contributor of sediment and nutrients to the lake. Once shoreline property is lost to erosion, it cannot be reclaimed. 

5. As of today, all Wonder Lake swimming beaches meet water quality standards. The current status of Wonder Lake swimming beaches can be found here: https://shorturl.at/NqEyH