As part of the District of Columbia Water and Sewer Authority's (DC Water) sewer inspection, evaluation and rehabilitation program, this project focuses on the inspection of public sewers throughout the city that have been identified under buildings.

Download a more detailed Project Information Sheet (PDF 123 kb) or Frequently Asked Questions on Inspection of Sewers Under Buildings (PDF 26 kb) .

Scope of Work

This sewer inspection project has four elements, or phases, which include the following:

  • Identify the locations of public sewers under buildings by overlaying maps of the sewer system with city maps detailing property lines and building foundations
  • Clean sewers using a high-pressure water jet spray; following this, inspect sewers using a Closed-Circuit Television camera
  • Evaluate the condition of sewers using trained specialists
  • Plan next steps, which may include future rehabilitation of sewers for restoration to "like new" condition

Project Schedule

This project started in November 2010 and is tentatively scheduled for completion during fall 2014.