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LOCATION.--Lat 39°15'21.5", long 77°03'03.8", Howard County, MD, Hydrologic Unit 02060006, 
   on right bank at downstream side of bridge on State Highway 97, 1.2 mi upstream from mouth.
DRAINAGE AREA.--22.9 mi2.
PERIOD OF RECORD.--June 1978 to September 1983 (published as "at Roxbury Mills Road at Roxbury Mills, MD"), 
   October 1983 to current year.
REVISIONS HISTORY.--WDR MD-DE-DC-03-1: 1983-2002 (P); daily discharges 1983-85, 1987-94, 1996-99, 2001.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 374.44 ft above North American 
   Vertical Datum of 1988. Prior to Dec. 28, 1983, at site 800 ft upstream at gage datum 1.76 ft lower.
REMARKS.--U.S. Geological Survey satellite data-collection platform at station. Water-quality records 
   for some prior periods have been collected at this location.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 3,450 ft³/s, Sept. 6, 1979, gage height, 9.86 ft;
   minimum discharge, 0.07 ft³/s, Aug. 14, 19, 20, 1999.
COOPERATION.--Funding for the operation of this station is provided by the Washington Suburban Sanitary
   Commission, and the U.S. Geological Survey.
This station managed by the MD-DE-DC Water Science Center Baltimore office.

Available Parameters Available Period
1988-05-18  2021-09-25
2007-10-01  2021-09-25


  -- or --



Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 23.6 09-25-2021   05:45 EDT
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Sep 25 based on 43 water years of record more
Median 75th
Mean Most Recent
Value Sep 25
1.29 5.6 9.1 14 16 23.6 98.2

Gage height, feet

Most recent instantaneous value: 0.96 09-25-2021   05:45 EDT
Graph of  Gage height, feet

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