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Oxon Run Valley Terrace Sewer Rehabilitation Project


The purpose of this project is to rehabilitate the sewer serving the Valley Terrace housing development in Southeast, DC and rehabilitate the sewers in Oxon Run Park, referred to as the Lower and Upper Relief Sewers. The Lower Relief Sewer has experienced deterioration from both age and exposure to the Oxon Run stream which has shifted over time. Through the Oxon Run Valley Terrace Sewer Rehabilitation Project, DC Water will rehabilitate the Upper Relief Sewer, abandon a portion of the Lower Relief Sewer, and design and construct an alternative sewer alignment to serve Valley Terrace by connecting it to the Upper Relief Sewer. Due to the Lower and Upper Relief Sewers’ locations in National Park Service (NPS) property, DC Water is working closely with the NPS to develop a design that will have minimal impact on the sensitive ecological resources of the area. An Environmental Assessment following the requirements of the National Environmental Policy Act (NEPA) may be required on this project.


  • Rehabilitation of Upper Relief Sewer on NPS property (sewer varies in diameter from 36 inches up to 42 inches) 
  • Construction of a new sewer to serve Valley Terrace housing development 
  • Removal or structural abandonment of portions of the Lower Relief Sewer, as directed by NPS 
  • Restoration of public roads and infrastructure, as needed SCHEDULE The estimated start and completion dates for the Valley Terrace project, as indicated below, are based on a preliminary construction schedule and may change according to final issuance of all necessary permits. 
  • Estimated design completion: December 2017 
  • Estimated construction start: March 2018 
  • Estimated construction completion: September 2018 
  • Normal work hours: 8:00 a.m. – 4:00 p.m., Monday through Friday 
  • Contractor may work at night or on weekends, dependent upon needed tie-in work or inclement weather


  • Residents will receive proper notification preceding all planned temporary interruptions in water and sewer services during the project. 
  • During certain phases of sewer work, you may detect an odor. Odors are most likely to occur in buildings with dry or non-existent traps. You are advised to make sure your traps are note dry, by running water in seldom used plumbing fixtures, including floor drains. If you should detect odors from the sewer lining process in your residence or building, take steps to increase ventilation of the area(s). 
  • If you have a sump pump that discharges into the sewer, it must be disconnected during our installation process. 
  • DC Water will work to ensure minimal disruption during the construction operations and will restore all work sites to their original condition. 
  • Noise and dust levels adjacent to the construction site will be closely monitored.


  • Lane closures may be required daily (8:00 a.m. – 4:00 p.m.) and traffic plans will be approved by the District Department of Transportation (DDOT). 
  • At various times during construction, “no-parking” signs may need to be placed in certain areas in and around the job site. Notifications regarding “no-parking” zones will be posted 72 hours prior to construction, as required by DDOT.


DC Water is currently working closely with the NPS and DDOE to ensure minimal disruption during this project. Public outreach will be provided to various Advisory Neighborhood Commissions, and through Ward 8’s Parkland Advisory Committee.