System Maintenance

Multiple Applications - Saturday, January 28 from 9 AM to Sunday, January 29 at 7 PM

System Maintenance

Wednesday, January 25, 6:00 pm to Monday, January 30, 6:00 am



This project is needed to remove sediment surrounding the intake structure at Brighton Dam, as well as removing sediment that has accumulated upstream of the dam since its original construction in the 1940’s. 


Once complete the reservoir’s drinking water storage capacity will increase by about 1 million gallons of water.

Construction Impact

Due to lower reservoir levels, all boat ramps on Triadelphia Reservoir will be closed, and no boating will be allowed. Additionally, the Greenbridge and Pig Tail recreation areas will be closed to ensure public safety due to the construction activity. As a result, shoreline fishing will only be available at Big Branch and Triadelphia Recreation areas. Recreational activities on T. Howard Duckett Reservoir will not be impacted.

The project’s anticipated start date is Spring/Summer 2023. Once the water level in the drinking-water reservoir is lowered and construction equipment is in place, the project will take 4 to 5 months to complete, weather permitting. Most work will occur during weekday daylight hours (7:00 am – 5:00pm). If needed, weekend work may occur.

Residents can expect 15 to 25 daily dump truck round trips between Greenbridge and Pig Tail recreation areas during work hours. Trucks will follow all posted speed limit signs and drive along the following roadways: Greenbridge Rd, New Hampshire Ave., Brighton Dam Rd., Highland Rd., Triadelphia Mill Rd., and Greenbridge Rd. (see map) Trucks will be lined to reduce sediment leaking during transport. Minimal noise is expected from the trucks traveling along the route and around the recreation areas. There will also be construction equipment at the Pig Tail recreation area to spread the sediment.

Project Update

November 10, 2022

The installation of the sediment removal project dewatering facility has begun (located on an adjacent field from the Pig Tail Recreation Area). The erosion and sediment control devices are being installed at the site and should be completed by the end of December 2022.  As a safety precaution, the archery deer hunting area is being closed during the installation of these sediment control devices. The installation of this sediment control device will not impact Pig Tail recreational and parking area. Currently, the Pig Tail Boat ramp is closed since, Triadelphia Reservoir water levels are dropping.

The dredging of the reservoir has been postponed until the 2023 spring - summer. WSSC Water plans to start mobilization of equipment to Green Bridge Recreation Area around mid-May 2023 at which time the Greenbridge Recreation Area will be closed to the public. The reservoir level will also be lowered by 20 feet  or more from the full level to facilitate the dredging operation and that will require all the Triadelphia boat ramps will be closed to the public. Access to the recreational areas will be allowed; however no boating or fishing will be allowed at the Triadelphia Reservoir.

Triadelphia project sediment removal area

Additional Information

Send questions to the project manager, John Kasprzak, at 301-206-8554  or or complete this form below.

Last Modified: November 17, 2022, 2:03 pm EST