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            McMillan Park and Sand Filtration Site is a twenty-five acre green space and decommissioned water treatment plant in northwest Washington, D.C. connected to the McMillan Reservoir. It is bound on the north by Michigan Avenue, on the east by North Capitol Street, on the south by Channing Street and on the west by First Street. Two paved courts lined by regulator houses, tower-like sand bins, sand washers and the gated entrances to the underground filter cells provided a promenade for citizens taking the air in the park.

Below grade there are twenty catacomb-like cells, each an acre in extent, where sand was used to filter water from the Potomac River by way of the Washington Aqueduct. The purification system was a slow sand filter design that became obsolete by the late 20th century. In 1985 a new rapid sand filter plant replaced it across First Street beside the reservoir. The treatment system is operated by the Army Corps of Engineers.

Public access to the site has been restricted since World War II when the Army erected a fence to guard against sabotage of the city's water supply. Specially arranged biannual tours are supported by scores of visitors curious about the odd-looking structures.

In 1991, the D.C. Historic Preservation Review Board designated McMillan Park a Historic Landmark and nominated the site for the National Register of Historic Places. It included the site on their "List of Most Endangered Properties in 2000" and again in 2005.

Taken on: October 30, 2011

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ARCHITECTURE

Abandoned

EAST COAST

MID ATLANTIC

McMillan

McMillan Resevoir

North America

PLANTS

SEASONS

USA

United States

Washington DC

autumn

building

cement

concrete

exterior

filtration

grass

hinge

historical

historical site

iron

ivy

landmark

metal

resevoir

rust

sand filtration

sand filtration site

vine

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Capital

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Sets appears in: • ABANDONED • WaterWorks

Groups appears in: • Abandoned Places and Things • McMillan Sand Filtration Plant

Camera: Nikon D7000, f/4.5, 1/5000 sec, 40mm (=60mm), ISO 1250 (more info) (hide info)

Camera:	Nikon D7000
Lens:	18.0-105.0 mm f/3.5-5.6
Aperture:	f/4.5
Exposure Time:	1/5000 sec
Focal Length:	40mm (35mm equivalent: 60mm)
ISO:	1250
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Gain Control:	High gain up
Color Space:	Uncalibrated
Software:	Adobe Photoshop Lightroom 4.1 (Macintosh)
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