Great news. The Riley Purgatory Bluff Creek Watershed District will be initiating the first dose of the Rice Marsh Lake alum treatment in the next couple weeks. As a reminder, Rice Marsh Lake is the first body of water upstream of Lake Riley on Riley Creek. The alum treatment will reduce the amount of phosphorus in the water flowing into Lake Riley, which will help reduce the frequency and intensity of algae blooms and ultimately contribute to improved water quality in Lake Riley.
As a reminder, Lake Riley had an alum treatment of its own in 2015 (and a second dose is planned in 2020), which has had a very positive impact on water quality in the lake over the last few years.
More info on the Rice Marsh Lake treatment is available at: https://ricemarshlakealum.wordpress.com/ (thanks Bob Adomaitis for the link). A Project Demonstration Day is being held on September 26 at 1:00pm on Erin Bay Rd for anyone interested in seeing firsthand what this is all about.