DC Water has expanded its water quality testing initiative over a three-week period at high-use recreational areas along the Potomac River. This proactive measure is intended to complement the daily water quality sampling already underway following the sewer overflow caused by the Potomac Interceptor collapse that occurred in January and has since been repaired. The expanded testing comes in response to community feedback and provides additional information to residents and recreational users about current river conditions.

For more than two months, daily water quality monitoring has shown E ...

DC Water and its contractor have removed all the soil down to the clay liner between locks 12 and 13, marking 50% completion of the canal clean-up. Soil removal between Locks 13 and 14 was completed earlier this month. Meanwhile, clean-up efforts continue between locks 10 and 12, with sludge removal complete and soil removal now underway.

First turn of cutterhead signals the start of excavation for the Potomac River Tunnel Project

In a defining moment for one of the District’s largest infrastructure investments, DC Water has marked its next major milestone in the Potomac River Tunnel Project. The first tunnel boring machine, Mary, has launched her northbound journey breaking through the soil to signal the start of excavation.