USGS Water-Year Summary for Site 01650500

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	Available Parameters
	00060 Discharge(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

01650500 NORTHWEST BRANCH ANACOSTIA RIVER NEAR COLESVILLE, MD

LOCATION - Lat 39°03'55.9", long 77°01'45.7" referenced to North American Datum of 1983, Montgomery County, MD, Hydrologic Unit 02070010, on right bank 250 ft downstream from culvert on Randolph Rd., 1.5 mi southwest of Colesville, 3 mi upstream from Burnt Mills, 10 mi upstream from Sligo Creek, and 12.5 mi upstream from confluence with Northeast Branch.

DRAINAGE AREA - 21 mi².

REVISIONS HISTORY -

WSP 1432: 1942(M), 1925-26, 1929-30(M), 1933(M), 1939(P), 1940(M), 1943-46, 1948-49(P).

https://waterdata.usgs.gov/nwis/uv/?site_no=01650500: 2017-2020.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1923 to September 1983, November 1997 to current year. Monthly discharge only for some periods, published in WSP 1302.

GAGE - Water-stage recorder, crest-stage gage and concrete control. Datum of gage is 264.14 ft above North American Vertical Datum of 1988. Prior to Apr. 22, 1932, nonrecording gages in same general vicinity at different gage datums. Apr. 22, 1932 to Apr. 11, 1934, nonrecording gage at present site and gage datum.

REMARKS -

Water Year 2023: Records fair, except those for estimated discharges, which are poor.

Water Years 2017-2022: Records good, except those above 500 ft³/s, which are fair, and those for estimated discharges, which are poor.

Water Year 2016: Records good, except those for the period May 14-August 15, which are fair, and those for estimated daily discharges, which are poor.

Water Years 2014-2015: Records good, except those for estimated daily discharges, which are poor.

Water Year 2013 and prior years’ accuracy statements can be found in Annual Water Data Reports.

Diversions at low flow since 1962 for irrigation of golf courses upstream from station. Records include pumpage from the Patuxent River to augment water supply for Washington Suburban Sanitary District, Aug. 12, 1939 to Aug. 1960. U.S. Geological Survey satellite data-collection platform at station.