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Triadelphia Reservoir

Template:Infobox lake Triadelphia Reservoir is located on the Patuxent River, in Howard County and Montgomery County, Maryland near the town of Brookeville.

The reservoir was created in 1943 by the construction of the Brighton Dam on the Patuxent.[1]


The river valley was once occupied by prehistoric Native American settlements surveyed in the 1980s when the modern dam was drained for maintenance.[2]

The reservoir is located on a land grant surveyed by Benjamin Gaither in 1725. It was named after the town of Triadelphia which was founded in 1809 by three Quaker brothers-in-law. Isaac Briggs, Thomas Moore, and Revolutionary veteran and silversmith Caleb Bentley built a small town on 276 acres of land with nine houses, sawmill, general store, grist mill, and a mill race. The property was expanded to 515 acres containing the land grant "Benjamin's Lot" and "What's Left".[3] The Triadelphia Cotton Factory (Montgomery Manufacturing Company) managed by Allen Bowie Davis operated 196 spindles from its waterwheel and grew to several dozen buildings by 1850 including Mt.Carmel Methodist Church and a schoolhouse.[4] In 1868 a flood washed away a portion of the city and a second flood destroyed most of the remainder. The Triadelphia Turnpike company operated a toll road from Triadelphia, to Glenelg to the Baltimore-Frederick Turnpike, now labeled Triadelphia road.[5] By 1905 the town was mostly abandoned. The Ligon family purchased the land using it for storage and tenants until it went underwater with the construction of the reservoir.[6]


It has a surface area of Script error: No such module "convert"..[7] The reservoir is maintained as a drinking water source by the Washington Suburban Sanitary Commission (WSSC).

WSSC provides recreational facilities to the public on portions of the Triadelphia property, including hiking, picnicing, fishing, boating, horseback riding, and hunting. Permits are required for any boating,and only self-powered or battery powered vessels are allowed. This is enforced by law enforcement who actively patrol the area.

See also


  1. ^ Washington Suburban Sanitary Commission. Laurel, MD. "The WSSC -- A Thumbnail History." June 2007.
  2. ^ M. Lee Preston, Jr. Archaeology In Howard County and Beyond. p. 21. 
  3. ^ Howard's Roads to the Past. Howard County Sesquicentennial Celebration Committee, 2001. 2001. p. 91. 
  4. ^ George Washington Howard. The Monumental City: Its Past History and Present Resources. p. 646. 
  5. ^ Maryland Geological Survey Report on the Highways of Maryland. 1899. p. 239. 
  6. ^ Maryland Historical Magazine. June 1948.  Missing or empty |title= (help)
  7. ^ Maryland Department of the Environment. Baltimore, MD."Total Maximum Daily Loads of Phosphorus and Sediments for Triadelphia Reservoir (Brighton Dam) and Total Maximum Daily Loads of Phosphorus for Rocky Gorge Reservoir, Howard, Montgomery, and Prince George’s Counties, Maryland." Final. June 2008. p. 4.

External links

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