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

PROVISIONAL DATA SUBJECT TO REVISION

Click to hidestation-specific text

 
DRAINAGE AREA.--11,560 mi2.
PERIOD OF RECORD.--March 1930 to current year.
GAGE.--Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 37.20 ft above 
   North American Vertical Datum of 1988. Prior to June 7, 1930, nonrecording gage, and June 7, 1930, to Jan. 22, 1965,
   water-stage recorder at site 1 mi upstream on right bank at same gage datum.
REMARKS.--Diversions since June 1959. U.S. Geological Survey satellite data-collection platform at station. 
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 484,000 ft3/s, Mar. 19, 1936,
   gage height, 28.1 ft, at site then in use; minimum daily discharge observed at gaging station, 121 ft3/s, Sept.
   9, 1966, does not include diversion of 489 ft3/s for municipal use; minimum daily discharge (adjusted),
   601 ft3/s, Sept. 10, 1966, includes diversion of 449 ft3/s for municipal use;
   minimum discharge, 66 ft3/s,  Sept. 9, 1966.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of June 2, 1889, was of approximately the same magnitude
   as that of March 19, 1936.
COOPERATION.--Funding for the operation of this station is provided by the U.S. Geological Survey.
   Access to gage site provided by the Baltimore District, U.S. Army Corps of Engineers.
   Water temperature and specific conductance monitoring are supported by the U.S. Army Corps of Engineers.

Revised Records: Prior revisions to drainage area are documented in Water Supply-Paper 726. Prior revisions to maximum discharge are documented in Water-Data Report WDR-MD-DE-75-1.

Boating safety tips
This station managed by the MD-DE-DC Water Science Center, Baltimore office.

Available Parameters Available Period
All 12 Available Parameters for this site
  
00010 Temperature, water, 4.1 ft from riverbed (middle) 2007-10-01  2016-09-24
00010 Temperature, water, 1.0 ft from riverbed (bottom) 2007-10-01  2016-09-24
00010 Temperature, water, 7.1 ft from riverbed (top) 2007-10-01  2016-09-24
00010 Temperature, water, From multiparameter sonde 2013-11-23  2016-09-23
00060 Discharge 2007-10-01  2016-09-24
00065 Gage height 2007-10-01  2016-09-24
00095 Specific cond at 25C 2007-10-01  2016-09-24
00095 Specific cond at 25C, From multiparameter sonde 2013-11-23  2016-09-23
00300 Dissolved oxygen, From multiparameter sonde 2013-11-23  2016-09-23
00400 pH, From multiparameter sonde 2013-11-23  2016-09-23
63680 Turbidity, Form Neph, From multiparameter sonde 2013-11-23  2016-09-23
99133 NO3+NO2,water,insitu 2011-12-03  2016-09-23

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Table
Tab-separated
Days  (7)
 

  -- or --
Begin date
 

End date
 

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


Temperature, water, degrees Celsius, 1.0 ft from riverbed (bottom)

Most recent instantaneous value: 25.1   09-24-2016   18:45 EST
Graph of  Temperature, water, degrees Celsius, 1.0 ft from riverbed (bottom)

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Temperature, water, degrees Celsius, 4.1 ft from riverbed (middle)

Most recent instantaneous value: 25.2   09-24-2016   18:45 EST
Graph of  Temperature, water, degrees Celsius, 4.1 ft from riverbed (middle)

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Temperature, water, degrees Celsius, 7.1 ft from riverbed (top)

Most recent instantaneous value: 25.2   09-24-2016   18:45 EST
Graph of  Temperature, water, degrees Celsius, 7.1 ft from riverbed (top)

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Temperature, water, degrees Celsius, From multiparameter sonde
 
-- Data temporarily unavailable for the time period specified --


Discharge, cubic feet per second

Most recent instantaneous value: 1,640   09-24-2016   18:45 EST
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Sep 24 based on 86 years of record more
Min
(2002)
25th
percen-
tile
Most Recent
Instantaneous
Value Sep 24
Median 75th
percen-
tile
Mean Max
(2003)
566 1300 1640 2110 3990 5510 115000


Gage height, feet

Most recent instantaneous value: 2.76   09-24-2016   18:45 EST
Graph of  Gage height, feet

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

Most recent instantaneous value: 411   09-24-2016   18:45 EST
Graph of  Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius, From multiparameter sonde
 
-- Data temporarily unavailable for the time period specified --

Dissolved oxygen, water, unfiltered, milligrams per liter, From multiparameter sonde
 
-- Data temporarily unavailable for the time period specified --

pH, water, unfiltered, field, standard units, From multiparameter sonde
 
-- Data temporarily unavailable for the time period specified --

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
 
-- Data temporarily unavailable for the time period specified --


Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen

Most recent instantaneous value: Eqp   09-23-2016   10:30 EST
Graph of  Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen

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