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USGS 01645762 S F LITTLE DIFFICULT RUN ABOVE MOUTH NR VIENNA, VA

  Stream Site

DESCRIPTION:
Latitude 38°54'31.6",   Longitude 77°20'18.8"   NAD27
Fairfax County, Virginia, Hydrologic Unit 02070008
Drainage area: 2.71 square miles
Datum of gage: 275.16 feet above   NAVD88.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    2007-10-01  2025-02-03  
 Daily Data
    Temperature, water, degrees Celsius  2007-09-30  2025-02-03  23927 
    Discharge, cubic feet per second  2007-09-20  2025-02-02  6346 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2007-09-30  2025-02-03  23253 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011-06-08  2025-02-03  18314 
    pH, water, unfiltered, field, standard units  2007-09-30  2025-02-03  17905 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2007-09-30  2017-08-16  3040 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2022-02-04  2025-02-03  3099 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2016-10-26  2025-02-03  8370 
 Daily Statistics 
    Temperature, water, degrees Celsius  2007-09-30  2023-05-23 5530 
    Discharge, cubic feet per second  2007-09-20  2024-08-21 6181 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2007-09-30  2023-05-23 5365 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011-06-08  2023-08-02 4177 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2007-09-30  2017-08-16 3040 
 Monthly Statistics 
    Temperature, water, degrees Celsius  2007-09  2023-05  
    Discharge, cubic feet per second  2007-09  2024-08  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2007-09  2023-05  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011-06  2023-08  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2007-09  2017-08  
 Annual Statistics 
    Temperature, water, degrees Celsius  2007  2023  
    Discharge, cubic feet per second  2007  2024  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2007  2023  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011  2023  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2007  2017  
 Peak streamflow 2008-09-06  2022-12-22  16 
 Field measurements 2007-09-27  2025-01-30  153 
 Field/Lab water-quality samples 2008-04-21  2024-02-28  685 
 Water-Year Summary 2008  2024  17 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS Virginia Water Science Center
Email questions about this site to Virginia Water Science Center Water-Data Inquiries