Sewer Hydraulic Study and Flood Reduction Feasibility Study
U.S. Army Corps of Engineers, Louisville, Kentucky

• Provide hydrological and hydraulic data consisting of historic and frequency water surface profiles, surcharge volumes, and maximum water surface elevations for the existing system, then make necessary modifications to the system
• Update the existing combined sewer model to include six very large flood-pumping stations  

• The study area covered 15,000 acres (23.5 square miles) and contained approximately 80,000 structures, including:
  • The historic Churchill Downs
  • The University of Louisville
  • The Kentucky Fair and Exhibition Center
• Data from eight reference storms was used for the feasibility study, and three different Ohio River stage conditions were simulated
• The last phase of the project involved evaluating the benefit of revising flood operations and capacities to reduce flooding in the Louisville Region and lessen the economic and environmental strain associated with the occurrence
• O’Brien & Gere performed a total of 24 simulations