Blue Plains (Washington, D.C.)

The United States Naval Research Laboratory (NRL) is the corporate research laboratory for the United States Navy and the United States Marine Corps. It was founded in 1923 and conducts basic scientific research, applied research, technological development and prototyping. The laboratory's specialties include plasma physics, space physics, materials science, and tactical electronic warfare. NRL is one of the first US government scientific R&D laboratories, having opened in 1923 at the instigation of Thomas Edison, and is currently under the Office of Naval Research.As of 2016, NRL was a Navy Working Capital Fund activity, which means it is not a line-item in the US Federal Budget. Instead of direct funding from Congress, all costs, including overhead, were recovered through sponsor-funded research projects. NRL's research expenditures were approximately $1 billion per year.

Blue Plains Advanced Wastewater Treatment Plant, located at 5000 Overlook Ave SW, Washington, DC 20032, is the largest advanced wastewater treatment plant in the world. The facility is operated by the District of Columbia Water and Sewer Authority (DC Water). The plant opened in 1937 as a primary treatment facility, and advanced treatment capacity was added in the 1970s and 1980s. The effluent that leaves Blue Plains is discharged to the Potomac River and meets some of the most stringent permit limits in the United States.

Oxon Creek is a stream on the Potomac River which feeds a cove that straddles the border between Washington, D.C. and Prince George's County, Maryland just north of Interstate 495 (Capital Beltway) at Woodrow Wilson Bridge. Oxon Creek heads at the confluence of Oxon Run and Barnaby Run, sometimes referred to as Winkle Doodle Run. It starts just inside the boundary of D.C. and then runs 1.5 miles (2.4 km) to the south and west into Maryland to empty into the Potomac at Goose Island (a sand bar often under water) across from the city of Alexandria, Virginia. Before reaching the Potomac, the creek widens to form Oxon Cove which is partially in Maryland and partially in Washington, D.C.. The creek is almost entirely within Oxon Cove National Park, except for the first few feet in D.C. and a portion of the cove on the southside of the Blue Plains Advanced Wastewater Treatment Plant.Two bridges cross the creek. The Anacostia Freeway crosses it on a bridge where it becomes a tidal stream and the Oxon Hill Farm Trail crosses it where it is still narrow. The unusual spelling is either historical or a reference to Oxfordshire, England, though it was usually labelled as Oxen Creek on maps prior to 1898. The distinction between Oxon Creek and Oxon Run is often not recognized and so both are frequently referred to as Oxon Run. USGS first started labeling it as Oxon Creek in 1892.

Goose Island is a vanishing island located in the Potomac River in the southwest quadrant of Washington, D.C., in the United States. It is a rarely above-water mudflat located at the mouth of Oxon Creek, roughly between Oronoco Bay in Alexandria and Marbury Point (Shepherds Landing), now part of the Blue Plains water treatment plant. National Oceanic and Atmospheric Administration nautical charts indicate that Goose Island sits within a shallow area, extending south past the Woodrow Wilson Bridge into Maryland, that is used to deposit dredging spoils.

Bellevue is a residential neighborhood in far Southeast and Southwest in Washington, D.C., United States. It is bounded by South Capitol Street, one block of Atlantic Street SE, and 1st Streets SE and SW to the north and east; Joliet Street SW and Oxon Run Parkway to the south; Martin Luther King Jr. Avenue SE, Shepherd Parkway, 2nd Street SW, and Xenia Street SW to the west. Bellevue was created from some of the earliest land patents in Maryland, and draws its name from a 1795 mansion built in the area. Subdivisions began in the 1870s, but extensive residential building did not occur until the early 1940s. Bellevue is adjacent to a number of federal and city agency buildings.

The Alexandria Canal was a canal in the United States that connected the city of Alexandria to Georgetown in the District of Columbia. In 1830, merchants from Alexandria (which at the time was within the jurisdiction of the federal District of Columbia) proposed linking their city to Georgetown to capitalize on the new Chesapeake and Ohio Canal (C&O Canal). Congress granted a charter to the Alexandria Canal Company in 1830. Construction began in 1833 and was completed in 1843. The Aqueduct Bridge (also begun in 1833 and completed in 1843) enabled canal boats from the C&O Canal to cross the Potomac River without descending to the river level. The boats would then continue their trips downstream on a canal on the southwest side of the Potomac until they reached Alexandria's seaport. The canal ran southwards for seven miles through today's Arlington County and City of Alexandria, Virginia, dropping 38 feet through a series of four locks between Washington Street and the Potomac River in the northern portion of Alexandria. The Canal ended at a Tidal Basin (Pool No. 1) and a Tidal Lock (Lift Lock No. 1) located at the north end of Old Town Alexandria. The canal was abandoned in 1886. Ten years after the canal closed, an electric trolley line was constructed in 1896 in Arlington on the bed of the towpath that traveled near and along the canal's west side (see: Washington-Mount Vernon line of the Washington, Alexandria, and Mount Vernon Electric Railway). Arlington's South Eads Street now approximates the canal's route in this area.Also in 1896, the Washington Southern Railway opened a line that traveled between the southern end of the Long Bridge and the southern end of the Aqueduct Bridge. The line, which passed the present site of The Pentagon, traveled within the grade of the former canal in the area that lies between Arlington National Cemetery and the Potomac River. The line became in 1904 the Rosslyn Connecting Railroad, which the Pennsylvania Railroad owned through a subsidiary, the Philadelphia, Baltimore and Washington Railroad (PB&W).The Rosslyn Connecting Railroad abandoned nearly all of its line in 1962 and closed in 1969. The Washington Metropolitan Area Transit Authority then constructed an open section of Metrorail's Blue Line along a portion of the railroad's route that had traveled within the canal's grade. The section of the Blue Line opened on July 1, 1977.After the Key Bridge was completed in 1923, the old superstructure of the Aqueduct Bridge was removed. During the 1980s, Alexandria City archaeologists and the developer of the neighboring Trans-Potomac Canal Center excavated the Tidal Basin and Lock and covered the original remnants with a reconstruction. Aside from these two features, the abutments of the Aqueduct Bridge in Georgetown and Rosslyn, and a pier of the bridge in the Potomac River upstream of the Key Bridge, all of the canal's remnants have either been removed or remain underground.

Fort Greble was an American Civil War-era Union fortification constructed as part of the defenses of Washington, D.C. during that war. Named for First Lieutenant John Trout Greble, the first West Point graduate killed in the U.S. Civil War, it protected the junction of the Anacostia and Potomac rivers, and from its position on a bluff in the Congress Heights, precluded any bombardment of the Washington Navy Yard and southeastern portions of the city. It was supported by Fort Carroll to the northeast and Fort Foote to the south. It never fired a shot during the war, and after a brief stint as a U.S. Army Signal Corps training facility, was abandoned and the land returned to its natural state. As of July 2007, the site of the fort is a community park.

Oxon Cove Park and Oxon Cove Farm is a national historic district that includes a living farm museum operated by the National Park Service, and located at Oxon Hill, Prince George's County, Maryland. It is part of National Capital Parks-East. It was listed on the National Register of Historic Places in 2003.The park provides an excellent resource for environmental studies, wildlife observing, fishing, and other recreational activities made possible by easy access to the Potomac River. Fourteen buildings and two structures are located in the historic district and associated with the property's sequential development as a plantation, an institutional agricultural complex, and a farm museum.

Saint Joseph Catholic Church is a Black Catholic church in the Old Town Historic District of Alexandria, Virginia. It was founded in 1916 with assistance from Katherine Drexel and the Josephites, as a mission church for African Americans. In 1967, Richmond bishop John J. Russell established the mission as a parish of the Diocese of Arlington in Virginia.

United States Coast Guard Station Washington is a United States Coast Guard station located on Joint Base Anacostia-Bolling in Washington, D.C. The station was commissioned on September 23, 2003.

Oxon Run is a tributary stream of Oxon Creek and the Potomac River in Prince George's County, Maryland, and Washington, D.C. In early maps, the stream is usually called "Oxen Run" and in 1892 the U.S. Geological Survey still labelled the stream as "Oxen Run" on its maps. Late in that year they changed the spelling they used, and others have followed suit, though it's unclear what led to the spelling change. Government officials and mapmakers often don't make a distinction between Oxon Creek and Oxon Run, instead treating Oxon Creek as a continuation of Oxon Run, but USGS still does. USGS first started labeling it as Oxon Creek in 1892.

U.S. Naval Torpedo Station, Alexandria was a facility of the United States Navy, located in Alexandria, Virginia, that existed from 1918 to 1945. After its closure, it was redeveloped into the Torpedo Factory Art Center.