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USGS 01646500 POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA

  Stream Site

DESCRIPTION:
Latitude 38°56'59.2",   Longitude 77°07'39.5"   NAD83
Montgomery County, Maryland, Hydrologic Unit 02070008
Drainage area: 11,560 square miles
Datum of gage: 37.20 feet above   NAVD88.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    2007-10-01  2016-09-28  
 Daily Data
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07-13  2016-09-27  10973 
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07-13  2016-09-27  11110 
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10-01  2016-09-27  29547 
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11-23  2016-09-22  2748 
    Discharge, cubic feet per second  1930-03-01  2016-09-27  31623 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-10-01  2016-09-27  21449 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11-23  2016-09-18  2736 
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11-23  2016-09-18  2718 
    pH, water, unfiltered, field, standard units -- From multiparameter sonde  2013-11-23  2016-09-22  2706 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2013-11-23  2016-09-18  2736 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12-03  2016-09-22  4605 
 Daily Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07-13  2016-04-11 3488 
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07-13  2016-04-11 3534 
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10-01  2016-04-11 9675 
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11-23  2016-03-16 730 
    Discharge, cubic feet per second  1930-03-01  2016-05-24 31497 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-10-01  2016-04-11 6979 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11-23  2016-03-16 730 
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11-23  2016-03-16 730 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2013-11-23  2016-03-16 730 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12-03  2014-09-30 905 
 Monthly Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07  2016-04  
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07  2016-04  
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10  2016-04  
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11  2016-03  
    Discharge, cubic feet per second  1930-03  2016-05  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-10  2016-04  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11  2016-03  
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11  2016-03  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2013-11  2016-03  
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12  2014-09  
 Annual Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006  2016  
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006  2016  
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1989  2016  
    Temperature, water, degrees Celsius -- From multiparameter sonde  2014  2016  
    Discharge, cubic feet per second  1930  2016  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1993  2016  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2014  2016  
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2014  2016  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2014  2016  
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2012  2014  
 Peak streamflow 1931-04-03  2015-04-22  85 
 Field measurements 1930-03-25  2016-08-31  360 
 Field/Lab water-quality samples 1965-08-09  2015-11-04  40 
 Water-Year Summary 2006  2015  10 

Additional Data Sources

Begin Date

End Date

Count
 Instantaneous-Data Archive  **offsite** 1972-06-09  2007-09-30  559179 
OPERATION:
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