Monitoring location Watts Branch at Washington, DC - USGS-01651800

LOCATION.-- At upstream side of Minnesota Ave bridge, and 1.0 mi upstream from mouth. PERIOD OF RECORD.--June 1992 to current year. GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 10.74 ft above North American Vertical Datum of 1988 (NAVD88). June 1992 to Sept. 30, 2007, at site 210 ft upstream at gage datum 5.00 ft higher (15.74 ft above NAVD88). October 1, 2007 to September 30, 2008 at site 10 ft upstream at gage datum 5.00 ft higher (15.74 ft above NAVD88). October 1, 2008 to June 13, 2016, at site 10 ft upstream at current gage datum. June 13, 2016 to current year, at current location and gage datum. PERIOD OF DAILY RECORD (Water Quality).-- SPECIFIC CONDUCTANCE: January 2013 to present. WATER TEMPERATURE: January 2013 to present. TURBIDITY: January 2013 to present. REMARKS (Water Quality).-- Turbidity values greater than 1,000 formazin nephelometric units (FNU) exceed the instrument calibration range. Values above 1,000 FNU are included in the record but are presumed to have lower accuracy. The accuracy limit of the turbidity sensor in low turbidity water is +/- 0.3 FNU. October 1, 2024: Values are censored and qualified as Less Than 0.3 FNU if they are recorded below 0.3 FNU.