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USGS 01645704 DIFFICULT RUN ABOVE FOX LAKE NEAR FAIRFAX, VA

  Stream Site

DESCRIPTION:
Latitude 38°53'04.5",   Longitude 77°19'57.8"   NAD27
Fairfax County, Virginia, Hydrologic Unit 02070008
Drainage area: 5.49 square miles
Datum of gage: 288.1 feet above   NAVD88.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    2007-10-01  2025-12-11  
 Daily Data
    Temperature, water, degrees Celsius  2007-09-30  2025-12-11  19403 
    Discharge, cubic feet per second  2007-09-21  2025-12-10  6656 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2007-09-30  2025-12-10  19170 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2009-05-20  2025-12-11  17128 
    pH, water, unfiltered, field, standard units  2007-09-30  2025-12-11  18851 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2022-12-12  2025-12-10  3101 
 Daily Statistics 
    Discharge, cubic feet per second  2007-09-21  2025-08-13 6537 
 Monthly Statistics 
    Discharge, cubic feet per second  2007-09  2025-08  
 Annual Statistics 
    Discharge, cubic feet per second  2007  2025  
 Peak streamflow 2008-09-06  2023-12-18  17 
 Field measurements 2007-09-27  2025-11-20  166 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 2008-04-03  2024-02-28  654 
 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