Client: Greeley and Hansen
Owner: DC Water
Location: Washington DC
https://www.dcwater.com/cleanrivers
The DC Clean Rivers project is being constructed to reduce combined sewer overflows (CSOs) into the Anacostia and Potomac Rivers, and Rock Creek. Additionally, components of the project target the reduction of flooding in certain District of Columbia northeast boundary neighborhoods. The DC Clean Rivers project includes combined sewerage storage tunnels as well as green solutions to reduce total handling of CSO water.
In its approximately $2.8 billion cost, the project comprises approximately 18 miles of soft ground and rock tunnels between 100 to 170 feet in depth. Tunnels range from 15 to 23 feet in diameter and traverse beneath the Potomac and Anacostia Rivers as well as beneath federal, district and private residences. Drop shafts to take combined sewer and storm water flows to the tunnel level are 35 to 55 feet in diameter. At the project’s tunnel terminus are two larger diameter shafts of 70 and 132 feet in diameter which house the Grit and Screening Removal Shaft and Tunnel Dewatering Pump Station respectively. Near-surface facilities designed to divert flows from the various combined sewers to the drop shafts are located in postage-stamp sized sites throughout the District of Columbia. The DC Clean Rivers project possesses some of the nation’s most challenging tunneling work, with an aggressive schedule, in an unrelenting urban environment.
As part of the Program Consultants Organization, JCK Underground is assisting DC Water to implement and execute the DC Clean Rivers project. Currently, JCK Underground provides a wide range of services for the project including: design management for the Northeast Boundary Tunnel; construction oversight, including ensuring quality of construction, and managing costs; construction management for the CSO 021 Diversion project; and program-wide tunneling, deep excavation and trenchless expertise.
Previously, JCK Underground’s personnel functioned to: develop novel procurement strategies; plan and manage geotechnical investigations; establish program-wide protocols for protecting third party structures and formulate bid documents for construction contracts for the Blue Plains Tunnel, Anacostia River Tunnel, First Street Tunnel and Tingey Street Microtunnel Projects.
