Volunteers Help Clean Our Missouri River! Posted on September 22, 2017 by Ameristar - St. Charles Thank you to the team members who volunteered their time to help clean up the Missouri River on Saturday, September 16. Over 300 volunteers throughout the community partnered with the Missouri River Relief to help clean trash and debris from the Missouri River. After the significant flooding this year, the banks of the Missouri River were filled with trash, including everything from glass bottles to tires. Our team even found a motorcycle, winning the “Best Find of the Day” award! Keeping our river clean makes a positive impression to our guests, tourists, and makes it enjoyable for our families. Great job to everyone for their help!