If you don't want to come to Simpson Lake, you could join the MWA to clean their stretch.
You can also go to the main site and look for areas near you that near cleaning:
openspacestl.org/ocs/
MWA's 56th annual Operation Clean Stream - Missouri Whitewater Association
Date: Saturday 8/26/23
Time: Meet @ 9am to run shuttle and try to be on the water by 10 (ish)
Location: Meet at Sappington Bridge
Info: We will be cleaning 6 miles or so between Sappington bridge and Meramec State Park.
Lunch Provided: BBQ at the end of clean-up
**CONTACT: Jeff Clawges, 636-578-5719,
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Additional Info go to: Missouri Whitewater Association webpage > General Discussion or Facebook > Missouri Whitewater Association
**PLEASE Volunteer to help keep our Rivers Clean!