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Project Information Sheet

The DC Water Clean Rivers Project (Combined Sewer Overflow Control Program) is an activity of DC Water's Long Term Control Plan (LTCP). The LTCP is required by the U.S. Environmental Protection Agency to reduce pollution from combined sewer overflows (CSOs) to Rock Creek and the Anacostia and Potomac rivers. In achieving this goal, DC Water will implement a system of tunnels, sewers and other diversion structures to control and capture overflow throughout the city.

Download a more detailed Project Information Sheet (PDF 170 kb) on the Anacostia River Tunnel Project.

Blue Plains Tunnel

Download a more detailed Project Information Sheet (PDF 117 kb) for the DC Clean Rivers Project - Blue Plains Tunnel.

Work under Division A will extend from the Blue Plains Advanced Waste Water Treatment Plant in southwest DC to the Main Pumping Station in southeast DC.

Scope of Work

  • Installation of 24,300 linear feet of tunnel within the project area
  • Construction of 132-feet diameter dewatering shaft and 76-feet diameter screening shaft at BPAWWTP to serve as main access point for the Blue Plains Tunnel Construction
  • Construction of 55-feet diameter drop shaft at the Main Pumping Station to serve as terminus point for the Blue Plains Tunnel construction
  • Construction of a 50-feet diameter drop/overflow shaft at Joint Base Anacostia Bolling (JBAB)
  • Construction of a 55-feet diameter junction/drop shaft at Poplar Point Pumping Station

Project Schedule

Construction activities will start in July 2011 and be completed by November 2015.

CSO 019

Download a more detailed Project Information Sheet (PDF 203 kb) for the DC Clean Rivers Project-Overflow & Diversion Structures (CSO 019).

The work under Division C will occur at Robert F. Kennedy Stadium Drive, in northeast DC.

Scope of Work

Major work items include the following:

  • Construction of a Diversion Structure to divert CSOs out of the existing Northeast Boundary Trunk Sewer and convey it to the future tunnel system
  • Construction of an Overflow Structure which will provide flood relief to the northeast boundary area and discharge CSOs to the Anacostia River

Project Schedule

This project is scheduled to start in September 2011 and be completed by August 2013.

CSO 015/016/017

Download a more detailed Project Information Sheet (PDF 238 kb) for the DC Clean Rivers Project-M Street Diversion Sewer (CSO 015/016/017).

The work under Division E will occur on M Street SE, between 9th Street SE and 14th Street SE.

Scope of Work

Under the project, CSOs will be diverted from existing combined sewers using three diversion chambers, then conveyed to the future tunnel system along M Street SE through a series of 48-inch and 108-inch diameter diversion sewers constructed using trenchless methods. CSOs totaling 695 million gallons per day will be delivered to the LTCP tunnel system. The work also includes the rehabilitation of selected portions of the Eastside Interceptor (ESI) sewer and the Southeast Relief Water Main (SRWM).

Project Schedule

Construction activities will start in April 2012 and will be completed by March 2014.

Main Pumping Station & Tingey Street Diversions

Download a more detailed Project Information Sheet (PDF 95 kb) for the DC Clean Rivers Project-Main Pumping Station & Tingey Street Diversion.

The work under Division I will occur along Tingey Street SE, 4th Street SE and 5 1/2 Street SE.

Scope of Work

Major work items include, but are not limited to, the following:

  • Installation of 1,200 linear feet of combined sewers on Tingey Street between 2nd and 5th Streets
  • Construction of air handling facilities within a 55-feet diameter concrete shaft to serve as both access and terminus points for the Blue Plains Tunnel
  • Installation of four diversion chambers along Tingey Street sewer to carry CSOs into the Tunnel
Project Schedule

Construction on this project will start in September 2013 and be completed by August 2017.

Northeast Boundary and Branch Tunnels

Download a more detailed Project Information Sheet (PDF 153 kb) for the DC Clean Rivers Project - Northeast Boundary and Branch Tunnels.

The work under Northeast Boundary and Branch Tunnels (NEBBT) portion of the project extends from Robert F. Kennedy Stadium to the Rhode Island Avenue Metro Station, and then along Rhode Island Avenue to 6th St, NW (see back page for construction location map). The NEBBT will provide additional storage for CSOs and will relieve street and basement flooding in the Northeast Boundary area.

In preparation for construction of the tunnel, DC Water is performing field investigation work.

Scope of Work

Field investigation activities are as follows:
  • 55 test borings along the tunnel alignment.
  • Groundwater monitoring and sampling wells.
  • Land surveys to record locations of utilities, properties, borings and wells.
Future Tunnel Construction will include:
  • Installation of approximately 26,600 feet (5 miles) of tunnel.
  • Construction of drop shafts and diversion chambers along the tunnel.
Project Schedule

Field investigation activities for this project are scheduled to start in December 2012 and should be completed by December 2013. Construction will start in 2018 and be completed in 2022.

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