USGS Water-Year Summary 2021
01542500 WEST BRANCH SUSQUEHANNA RIVER AT KARTHAUS, PA
LOCATION - Lat 41°07'03", long 78°06'33" referenced to North American Datum of 1927, Clearfield County, PA, Hydrologic Unit 02050201, on left bank 900 ft upstream from bridge on State Highway 879 at Karthaus, 1,000 ft upstream from Mosquito Creek, and 3.3 mi upstream from Moshannon Creek. Records include flow of Mosquito Creek.
DRAINAGE AREA - 1,462 mi².
PERIOD OF RECORD - October 1918 to September 1920 (gage heights only); February 1940 to September 1995; October 1995 to September 2004 (annual maximum only); October 2004 to current year.
GAGE - Water-stage recorder, crest-stage gage, and water-quality monitor. Datum of gage is 830.59 ft above National Geodetic Vertical Datum of 1929. Prior to Sep 30, 1920, non-recording gage at site 900 ft downstream at datum 20.88 ft lower. Feb 21 to Sep 30, 1940, non-recording gage at site 900 ft downstream at present datum. Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for this station is provided by the Pennsylvania Department of Environmental Protection and the U.S. Geological Survey through the National Streamflow Information Program.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known, about 24.5 ft, Mar 18, 1936, from floodmarks at highway bridge, discharge, about 135,000 ft³/s.
PERIOD OF RECORD - November 2010 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: November 2010 to current year.
SPECIFIC CONDUCTANCE: November 2010 to current year.
DISSOLVED OXYGEN: March 2011 to current year, seasonal operation.
pH: March 2011 to current year, seasonal operation.
COOPERATION - Station established by the US Geological Survey in cooperation with the Pennsylvania Department of Environmental Protection.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 811 microsiemens/cm, Jul 27, 2011; minimum, 109 microsiemens/cm, Sep 11, 2018.
PH: Maximum, 8.6 standard units, Aug 4,5, 2012; minimum, 5.5 standard units, Sep 30, 2015.
WATER TEMPERATURE: Maximum, 33.0°C, Jul 22, 2011; minimum, -0.7°C, several days during winter periods.
DISSOLVED OXYGEN: Maximum, 13.5 mg/L Nov 26, 2015 and Mar 17, 2018; minimum, 4.9 mg/L Jul 25, 2020.