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Date/Time Thumbnail Dimensions User Comment; current: 16:26, 17 March 2017: 172 × 193 (72 KB): Erp: forgot to reset document size: 16:25, 17 March 2017: 321 × 343 (63 KB): Erp
Neighborhoods in Washington, D.C., the capital of the United States, are distinguished by their history, culture, architecture, demographics, and geography. The names of 131 neighborhoods are unofficially defined by the D.C. Office of Planning. [ 1 ]
Map of the boundary stones. The District of Columbia (initially, the Territory of Columbia) was originally specified to be a square 100 square miles (260 km 2) in area, with the axes between the corners of the square running north-south and east-west, The square had its southern corner at the southern tip of Jones Point in Alexandria, Virginia, at the confluence of the Potomac River and ...
The gatehouse was constructed at the Georgetown Reservoir to pump water into the four-mile long Washington City Tunnel that led to McMillan Reservoir, completed in 1902. [2] [3] A filtration system was constructed at McMillan in 1905 and this system improved the quality of city water. [3] [4] [5] Construction of the gatehouse began in 1899.
The Washington Aqueduct is an aqueduct that provides the public water supply system serving Washington, D.C., and parts of its suburbs, using water from the Potomac River. One of the first major aqueduct projects in the United States, it was commissioned by the U.S. Congress in 1852, and construction began in 1853 under the supervision of ...
The old treatment site was purchased by the District of Columbia from the federal government in 1987 for $9.3 million, and the site began to deteriorate due to lack of maintenance. At that time DC government had no specific plan for the site. [6] In 1991, the McMillan Reservoir site was designated a DC Historic Landmark.
Foundry Branch is a tributary stream of the Potomac River in Washington, D.C.. The historic headwaters of the stream were in the Tenleytown area in Northwest Washington. Today, the section of the stream north of Massachusetts Avenue is hydrologically separated from the lower section and runs through a large stormwater pipe under the daylighted portion.
In October 1999, the Corps of Engineers established a system of laboratories, called the Engineer Research and Development Center (ERDC). [2] The ERDC was a consolidation of seven, pre-existing laboratories: the Coastal and Hydraulics, Environmental, Geotechnical and Structures, and Information Technology Laboratories in Vicksburg, Mississippi; the Construction Engineering Research Laboratory ...