Combined Sewer Overflow, Tunnel/Interceptor Replacement

Wiley|Wilson provided the evaluation, design, bidding phase services and construction administration services for combined sewer overflow, tunnel/interceptor replacement of 26 miles of the City’s four major interceptor sewers including the 84” James River Interceptor. The design of the interceptors included the modeling of the City’s sewer network to increase the capacity of the main interceptors to reduce the frequency of overflows.

The successful design and administration of these projects included coordination with groups of stakeholders that included City of Lynchburg personnel, Virginia Department of Environmental Quality, Army Corps of Engineers, CSX railroad, Norfolk Southern railroad, businesses, citizens and contractors.  Some of the unique challenges of these projects included the design of multiple tunneling operations under existing railroad features and City Streets, structural riverbank stabilization design for the south bank of the James River, and the coordination and design of large diameter installations within City Streets and parks.