Helicopters at Great Falls?

From January 27 to February 2, 2025, DC Water conducted geological investigations in the Potomac River to determine the most effective strategy and design alternatives for the replacement and rehabilitation of the Potomac Interceptor.

Rock core samples were taken just below the Washington Aqueduct dam in Great Falls. This investigation will provide DC Water’s engineers a better understanding of the geology in the area. The investigation required the transport of both workers and a drilling rig by helicopter that drilled up to 50 feet in depth at five locations within the Potomac River.

More information on rock cores and what occurred during the week long investigation can be found here.  Find the latest news and photos here.

Did You Know?

Buildings in Disguise- There are multiple buildings serving as odor control facilities. These facilities draw odorous air from the Potomac Interceptor, pass the air through a media-filled vessel to remove the majority of odors, and discharge the treated air to the atmosphere. The facilities are part of the Potomac Interceptor's Odor Control Abatement Program.