Piney Branch is a

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...

Rock Creek Rock Creek or Rockcreek may refer to: Streams United States * Rock Creek (California) * Rock Creek (Fountain Creek tributary), Colorado * Rock Creek (Idaho) * Rock Creek (Kankakee River tributary), Illinois * Rock Creek (Wapsipinicon River tribut ...

Washington, D.C. ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...

It is the largest tributary located entirely within the Washington city limits.

Course

Located in the Northwest quadrant of Washington, D.C., the stream flows next to Piney Branch Parkway and empties into Rock Creek near the intersection of the parkway and Beach Drive, inside

Rock Creek Park Rock Creek Park is a large urban park that bisects the Northwest quadrant of Washington, D.C. The park was created by an Act of Congress in 1890 and today is administered by the National Park Service. In addition to the park proper, the Rock Cr ...

. Rock Creek drains to the

Potomac River The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved Augus ...

, which empties into the

Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The Bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the ...

. Piney Branch is a

first order In mathematics and other formal sciences, first-order or first order most often means either: * "linear" (a polynomial of degree at most one), as in first-order approximation and other calculus uses, where it is contrasted with "polynomials of high ...

stream (i.e., no tributaries) with a surface length of . It is generally about wide and deep. It is the largest tributary located entirely within the Washington city limits.

Watershed and water quality

Piney Branch drains a

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

of . Its surface stream drainage is augmented by four

combined sewer A combined sewer is a type of gravity sewer with a system of pipes, tunnels, pump stations etc. to transport sewage and urban runoff together to a sewage treatment plant or disposal site. This means that during rain events, the sewage gets dilute ...

systems that discharge into it. About five percent of the watershed consists of forested parkland near its surface stream. The rest of the area is mainly residential, with some light industrial zones. The creek is listed as polluted by 10 chemicals and four metals: lead, copper, zinc, and arsenic. It is spanned by the 16th Street Bridge, the country's first

parabolic arch A parabolic arch is an arch in the shape of a parabola.Article about parabolic arch by The Free DictionaryParabolic arch , Article about parabolic arch by The Free Dictionary accessdate: March 2, 2017 In structures, their curve represents an effi ...

bridge.

History

In prehistoric times, the creek's valley was a source of

quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tect ...

cobbles Cobblestone is a natural building material based on cobble-sized stones, and is used for pavement roads, streets, and buildings. Setts, also called Belgian blocks, are often casually referred to as "cobbles", although a sett is distinct fro ...

for toolmaking. One quarry site is located at the bluffs overlooking Piney Branch from the north, about 30 feet below the summit of a southeast-facing hill. Dubbed the "Piney Branch Quarry Site", it was first examined by archeologist

William Henry Holmes William Henry Holmes (December 1, 1846 – April 20, 1933), known as W. H. Holmes, was an American explorer, anthropologist, archaeologist, artist, scientific illustrator, cartographer, mountain climber, geologist and museum curator and direc ...

in 1889 and 1890. Another investigation begin in 2006 revealed quartzite

debitage In archaeology, debitage is all the material produced during the process of lithic reduction – the production of stone tools and weapons by knapping stone. This assemblage may include the different kinds of lithic flakes and lithic blades, b ...

, whole and broken turtleback “preforms,” and half of a large ax. In the mid-1800s, the creek's valley was the location of the first road through the area that would become Rock Creek Park. Called Piney Branch Road or 14th Street Road, the narrow country way went north from the Mount Pleasant neighborhood down into the valley, across a rickety bridge just west of today's 16th Street Bridge, then climbed up to the present-day neighborhood of Crestwood. Funding to build the Piney Branch Parkway, which runs along the creek for most of its length, was "authorized in 1907, but not built until the mid-1930s when funding and workers became available through the

New Deal The New Deal was a series of programs, public work projects, financial reforms, and regulations enacted by President Franklin D. Roosevelt in the United States between 1933 and 1939. Major federal programs agencies included the Civilian Cons ...

." In 2014, the

District of Columbia Water and Sewer Authority The District of Columbia Water and Sewer Authority (DC Water) provides drinking water, sewage collection and sewage treatment for the District of Columbia, in the United States. The utility also provides wholesale wastewater treatment services t ...

began design work on the Piney Branch Trunk Sewer Rehabilitation Project, a series of repairs and improvements to the combined sewer system that discharges into the creek. Composed of 8- to 10-foot brick and concrete pipes, the Piney Branch Trunk Sewer is one of the city's major trunk sewers. Project design was slated to start in January 2014 and last one year. As of early 2016, work was to begin in 2017 and last until 2019.

References

External links

Piney Branch watershed photos

2009 map
of the

that empties into Piney Branch {{Authority control Rock Creek (Potomac River tributary) Rock Creek Park Rivers of Washington, D.C.

Course

Watershed and water quality

History

See also

References

External links