USGS Water-Year Summary 2020
01576000 SUSQUEHANNA RIVER AT MARIETTA, PA
LOCATION - Lat 40°03'16", long 76°31'52" referenced to North American Datum of 1927, Lancaster County, PA, Hydrologic Unit 02050306, on left bank 420 ft upstream from Chickies Creek, and 1.0 mi downstream from Marietta. A water-quality probe was installed downstream of the streamflow gage. The location is immediately above the Rte. 462 bridge attached to one of the abandoned piers in the center of the river. The location is lat 40 01' 41.87" long 076 31' 13.36".
DRAINAGE AREA - 25,990 mi². approximately, includes Chickies Creek.
- WSP 781: 1933(M). WSP 1502: 1937.
PERIOD OF RECORD - October 1931 to current year.
GAGE - Water-stage recorder. Datum of gage is 200.56 ft above National Geodetic Vertical Datum of 1929. Satellite and landline telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for the operation of this station is provided by the Pennsylvania Department of Environmental Protection, Brookfield Renewable Energy Group, and the U. S. Geological Survey.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Jun 2, 1889, reached a stage of 58.2 ft, from floodmark, discharge, about 630,000 ft³/s.
PERIOD OF RECORD - May 4, 2015 to July 23, 2018. Seasonal, no winter monitoring.
PERIOD OF DAILY RECORD - May 5, 2015 to July 23, 2018.
COOPERATION - Funding for the operation of this station is provided by Exelon Corporation and the Maryland Department of Natural Resources. The Holtwood Hydroelectric Dam is operated by Talen Energy.
INSTRUMENTATION - YSI EXO multiparameter probe internally logging turbidity, specific conductance, and water temperature at 15-min interval. Data are not transmitted; data are retrieved every 6-8 weeks.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 445 microsiemens/cm, Sep 30, 2015; minimum, 145 microsiemens/cm, Jul 7, 2015. WATER TEMPERATURE: Maximum, 32.5°C, Jul 27, 2016; minimum, 5.0°C, Dec 8, 2015. Turbidity: Maximum, 562 NTU, Jul 28, 2017; minimum 0.0 NTU, many occassions.