Harmful Algal Bloom Advisories

UPDATE: Triadelphia and T. Howard Duckett Reservoirs

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2022 Watershed Season

The watershed is now open for boating and fishing on the reservoirs. Gates open 1/2 hour before sunrise. If you arrive and a gate is not open, please call our Police at 301-206-8888.

  • As of August 22, 2022 - Browns Bridge boat ramp is closed to all boats until further notice due low water levels
  • Due to the receding water level at Triadelphia Reservoir, Pig Tail boat ramp is open for carry-in boats. No boat trailer access.
  • If using a boat trailer, please consider using alternative boat ramps on Triadelphia Reservoir or T. Howard Duckett Reservoir.
  • Greenbridge, Triadelphia, and Big Branch boat ramps are fully accessible.

A sediment removal project on Triadelphia Reservoir is scheduled for later this fall. During that time, all boat ramps will be closed and no boating will be allowed. Additionally, the Greenbridge and Pig Tail recreational areas will be closed to ensure public safety due to the construction activity.

Permits can be purchased online or in person at the Brighton Dam Visitor Center or WSSC Water's headquarters. All boat mooring permits must be purchased in person at the Brighton Dam Visitor Center

If you have any questions please contact



Interactive Google™ Maps of WSSC Water Recreation Areas are linked to each location title

Location Address Boat
Playground Grills Moors
Handicapped Pier Plant List

Browns Bridge Recreation Area

2220 Ednor Road
Silver Spring, MD 20905


Scott's Cove Recreation Area

10972 Harding Road
Laurel, MD 20723

X X X X X    

Supplee Lane Recreation Area

16904 Supplee Lane 
Laurel, MD 20707

X X   X      

Big Branch Recreation Area

14801 Triadelphia Mill Road
Dayton, MD 21036

X X X X      

Brighton Dam

2 Brighton Dam Road
Brookeville, MD 20833

  X X X      

Greenbridge Recreation Area

2800 Greenbridge Road
Brookeville, MD 20833

X       X    

Pig Tail Recreation Area

5600 Green Bridge Rd
Dayton, MD 21036


Triadelphia Recreation Area

2600 Triadelphia Lake Road
Brookeville, MD 20833





Watershed Permits:

As per WSSC Water Watershed Regulations:

WSSC Water reserves the right to close a portion of, or the entire watershed without prior notice if:

  • water quality is negatively affected,
  • water levels drop to unacceptable levels,
  • the health and safety of the watershed, WSSC’s Water systems, customers, or permitted watershed users are at risk.

At its sole discretion, WSSC Water may change these regulations for any other reason as needed

Please call (301) 206-4386(4FUN) before making any watershed permit purchases to ensure the reservoir that you’d like to use is currently open for recreation.

Last Modified: September 19, 2022, 9:09 am EDT