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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01480685 MARSH CREEK NEAR DOWNINGTOWN, PA
LOCATION - Lat 40°03'19", long 75°43'00" referenced to North American Datum of 1927, Chester County, PA, Hydrologic Unit 02040205, on left bank 1,000 ft downstream from Marsh Creek Dam, 0.2 mi upstream from mouth, and 3.0 mi north of Downingtown.
DRAINAGE AREA - 20.3 mi².
REVISIONS HISTORY - Prior to February 19, 2025, the datum of gage was erroneously reported as 280 ft above National Geodetic Vertical Datum of 1929.
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1973 to current year.
GAGE - Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 284.8 ft. above North American Vertical Datum of 1988 (GNSS survey). Prior to February 19, 2025, the datum of gage was erroneously reported as 280 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey in cooperation with the Pennsylvania Department of Environmental Protection. Change in contents figures provided by Pennsylvania Department of Environmental Protection.
REMARKS - Flow completely regulated since November 1973 by Marsh Creek Reservoir (station 01480684).
Records for water years 2014-2015 are good. Records for water year 2016 are good with the exception of those for estimated daily discharges which are poor. Records for water year 2017 are good. Records for water year 2018 are good except those discharges less than 10 cfs, which are poor. Records for water years 2019-2023 are good except those discharges less than 10 cfs, those greater than 200 cfs, and those estimated discharges, which are poor.
Records for water years 2014-2015 are good. Records for water year 2016 are good with the exception of those for estimated daily discharges which are poor. Records for water year 2017 are good. Records for water year 2018 are good except those discharges less than 10 cfs, which are poor. Records for water years 2019-2023 are good except those discharges less than 10 cfs, those greater than 200 cfs, and those estimated discharges, which are poor.
