The Louisville MSD Combined Sewer System is comprised of 103 outfalls. During wet weather rain events, combined sewer overflows (CSOs) discharge sewage to the Ohio River or Beargrass Creek. Throughout the course of the MSD CSO program, solids and floatables controls were installed at
these outfalls. In 2006, these controls were installed on 78 additional outfalls. A sampling program was developed to track the volumes of solids and floatables retained by these controls as well as the visual impacts on the receiving stream. Results and lessons learned from this sampling
effort are presented herein.
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