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* IMPORTANT: Next Generation Station Page

USGS 01648010 ROCK CREEK AT JOYCE RD WASHINGTON, DC

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION.--Lat 38°57'36.6", long 77°02'31.4", Washington, DC, Hydrologic Unit 02070010,
   on right bank at downstream side of bridge on Joyce Rd. 
DRAINAGE AREA.--63.7 mi2.
PERIOD OF RECORD.--April 2007 to September 2012 (gage heights and discharge measurements only).
   October 2012 to current year.
GAGE.--Water-data recorder and crest-stage gage. Datum of gage is 136.78 ft above North American 
   Vertical Datum of 1988.
REMARKS.--Flow affected by two upstream reservoirs which control flow from about 25 mi2,
   Needwood Lake on Rock Creek since Sept. 1966 and Bernard Frank Lake on North Branch Rock Creek 
   since February 1968. U.S. Geological Survey water-data telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 4,570 ft³/s, Sept. 10, 2020, gage height, 9.07 ft; 
   Maximum gage height, 9.68 ft, Apr. 30, 2014; Minimum discharge, 4.58 ft³/s, Sept. 21, 2015.  
COOPERATION.--Funding for the operation of this station is provided by the Montgomery County 
   Department of Environmental Protection, and the U.S. Geological Survey.   
This station managed by the MD-DE-DC Water Science Center Baltimore office.

Available Parameters Available Period
  
2021-05-24  2021-07-24
2012-06-08  2021-07-24
2012-10-01  2021-07-24
2012-10-01  2021-07-24
2021-05-24  2021-07-24
2012-06-08  2021-07-24
2021-05-24  2021-07-24
2012-06-08  2021-07-24
2021-05-24  2021-07-24
2012-06-08  2021-07-24
2021-05-24  2021-07-24
2012-06-08  2021-07-24
2014-10-07  2016-11-02
2014-10-07  2016-11-02
2015-11-24  2020-03-17







 (1)
 

  -- or --

 


 

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


Temperature, water, degrees Celsius

Most recent instantaneous value: 23.3 07-24-2021   13:35 EDT
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Temperature, water, degrees Celsius, Upstream Location

Most recent instantaneous value: 23.3 07-24-2021   13:35 EDT
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Discharge, cubic feet per second

Most recent instantaneous value: 20.2 07-24-2021   13:35 EDT
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Daily discharge, cubic feet per second -- statistics for Jul 24 based on 8 water years of record more
Min
(2016)
Most Recent
Instantaneous
Value Jul 24
25th
percen-
tile
Median Mean 75th
percen-
tile
Max
(2017)
17.9 20.2 21 42 119 264 379


Gage height, feet

Most recent instantaneous value: 1.33 07-24-2021   13:35 EDT
Graph of  Gage height, feet

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

Most recent instantaneous value: 535 07-24-2021   13:35 EDT
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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius, Upstream Location

Most recent instantaneous value: 539 07-24-2021   13:35 EDT
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Dissolved oxygen, water, unfiltered, milligrams per liter

Most recent instantaneous value: 8.8 07-24-2021   13:35 EDT
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Dissolved oxygen, water, unfiltered, milligrams per liter, Upstream Location

Most recent instantaneous value: 8.8 07-24-2021   13:35 EDT
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pH, water, unfiltered, field, standard units

Most recent instantaneous value: 7.8 07-24-2021   13:35 EDT
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pH, water, unfiltered, field, standard units, Upstream Location

Most recent instantaneous value: 7.8 07-24-2021   13:35 EDT
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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

Most recent instantaneous value: 1.8 07-24-2021   13:35 EDT
Graph of  Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU), Upstream Location

Most recent instantaneous value: 2.3 07-24-2021   13:35 EDT
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