Northwest Branch Anacostia River

Northwest Branch Anacostia River is a 21.5-mile-long (34.6 km)[1] free-flowing stream in Montgomery County and Prince George's County, Maryland. It is a tributary of the Anacostia River, which flows to the Potomac River and the Chesapeake Bay.

Northwest Branch Anacostia River
Map of the Anacostia River watershed showing the Northwest Branch
Location
CountryUnited States
StateMaryland
CitiesWheaton, Silver Spring, Hyattsville
Physical characteristics
Source 
 • locationSandy Spring, Maryland
MouthAnacostia River
 • location
Bladensburg, MD
 • coordinates
38.942832°N 76.944036°W / 38.942832; -76.944036
Length21.5 mi (34.6 km)
Basin size53.5 sq mi (139 km2)
Basin features
Tributaries 
 • leftOld Orchard, Bryants Nursery, Norwood, Rolling Stone
 • rightBachelors Forest, Longmeade, Bel Pre Creek, Wheaton Park, Lamberton Dr, Sligo Creek

Course

The headwaters of the Northwest Branch are located near the community of Sandy Spring.[2] The stream flows southward for 21.5 miles (34.6 km) to its confluence with the Northeast Branch near Bladensburg to form the main stem of the Anacostia.[3]

Watershed

The watershed in Montgomery County includes portions of the communities of Norwood, Bel Pre Manor, Colesville, Layhill, Glenmont, Wheaton, Hillandale, White Oak, Silver Spring, Kemp Mill, Four Corners and Takoma Park. The Prince George's County portion of the watershed includes Adelphi, Langley Park, University Park, Chillum, Hyattsville, Avondale and Brentwood. The total watershed area, including a small portion of land in Washington, D.C., is 53.5 square miles (139 km2), with a resident population of about 254,000.[4][5]

The middle section of the Northwest Branch is referred to as the Rachel Carson Environmental Area. It flows through a small gorge underneath the Capital Beltway between Colesville Road and Adelphi Mill. Located at the north end of the Northwest Branch Trail, near the home of noted environmental author Rachel Carson, it is deliberately left rustic and unimproved.[6]

The majority of the Northwest Branch stream valley is a riparian buffer, protected as parkland by the Maryland-National Capital Park and Planning Commission (M-NCPPC).[4] The Rachel Carson Greenway planned by M-NCPPC will extend the Northwest Branch Trail into northern Montgomery County as an unimproved hiking trail, connecting to the Anacostia Tributary Trail System in Prince George's County.

Geology
The Northwest Branch at the Fall Line

Northwest Branch crosses the geological fall line between the Piedmont and Atlantic coastal plain regions, which forms a small waterfall on the stream 0.5 miles (0.80 km) south of the Burnt Mills Dam parks.[7] This area was a favorite spot of Theodore Roosevelt.[8]

Tributaries

The total stream channel length of Northwest Branch and all tributaries is 75 miles (121 km).

  • Bachelors Forest Tributary
  • Bel Pre Creek
  • Bryants Nursery Tributary
  • Lamberton Drive Tributary
  • Lockridge Drive Tributary
  • Longmeade Tributary
  • Norwood Tributary
  • Old Orchard Tributary
  • Rolling Stone Tributary
  • Sandy Spring Tributary
  • Sligo Creek
  • Wheaton Park Tributary

See also

References
  1. "The National Map". National Hydrography Dataset high-resolution flowline data. U.S. Geological Survey. Retrieved August 15, 2011.
  2. 39°08′46.9″N 77°02′08.3″W
  3. "Mission Statement". Neighbors of the Northwest Branch. Retrieved August 31, 2009.
  4. "Northwest Branch: Profile". Anacostia Watershed Restoration Partnership (AWRP). Washington, DC. January 6, 2016. Retrieved June 21, 2010.
  5. "Sligo Creek: Profile". AWRP. Retrieved June 21, 2010.
  6. "Rachel Carson Greenway & Northwest Branch Stream Valley Park Trails". Montgomery Parks/MNCPPC. Retrieved November 14, 2009.
  7. "Northwest Branch". DC Great Outdoors.
  8. Meyer, Eugene (November 21, 2009). "When Presidents Came to Visit". Bethesda Magazine.

Bibliography
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