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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  2025-10-24  
 Daily Data
    Temperature, water, degrees Celsius  2007-09-30  2025-10-24  19182 
    Discharge, cubic feet per second  2007-09-20  2025-10-23  6607 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2007-09-30  2025-10-23  18669 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011-06-08  2025-10-24  19100 
    pH, water, unfiltered, field, standard units  2007-09-30  2025-10-24  18666 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2022-10-25  2025-10-23  3102 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2016-10-26  2025-10-23  9111 
 Daily Statistics 
    Discharge, cubic feet per second  2007-09-20  2025-06-11 6475 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011-06-08  2023-08-02 4177 
 Monthly Statistics 
    Discharge, cubic feet per second  2007-09  2025-06  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011-06  2023-08  
 Annual Statistics 
    Discharge, cubic feet per second  2007  2025  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2011  2023  
 Peak streamflow 2008-09-06  2023-12-17  17 
 Field measurements 2007-09-27  2025-08-14  157 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 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