Project Highlight: Monticello Collection System Improvements

The City of Monticello, Indiana recently finished constructing over $8 million in collection system improvements, which involved installing approximately 2 miles of gravity sewers ranging in size from 12 to 60 inches in diameter. The project is an important part of the City’s goal to reduce combined sewer overflows (CSOs) into the Tippecanoe River and Lake Freeman.

The project was complex and included:
• Expanding the existing CSO detention system upstream of Bryan’s Lift Station by 286,000 gallons with 60-inch diameter pipe along Bluewater Drive that also serves as a conveyance interceptor.
• Installing a deep 48-inch WWTP effluent pipe that required a slide rail earth retention system.
• Upgrading the multi-purpose trail leading to the historic Tioga Bridge, which was built over the 48-inch WWTP effluent pipe.
• Constructing temporary cofferdams along the banks of the lake to replace 2 large outfalls.
• Ensuring that future improvements associated with the City’s CSO Long Term Control Plan will be successful via design-level collection system hydraulic modeling.