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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
01494850 EAST BRANCH BIG ELK CREEK AT FORESTVILLE, PA
LOCATION - Lat 39°49'20", long 75°53'50" referenced to North American Datum of 1927, Chester County, PA, Hydrologic Unit 02060002, on upstream side of bridge on West Baltimore Pike, 0.83 mi northeast of Forestville, and 3.7 mi west of West Grove.
DRAINAGE AREA - 9.69 mi².
REVISIONS HISTORY -
WDR-US-2010:2009.
Prior to October 28, 2022 the datum of gage was reported as 410 ft above National Geodetic Vertical Datum of 1929 (NAVD29)
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2007 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 395.2 ft above North American Vertical Datum of 1988 (NAVD88) from single-base GNSS rapid static survey. Satellite and landline telemetry at station. Prior to October 29, 2022, the datum of gage was erroneously reported as 410 ft above North American Vertical Datum of 1929 (NGVD29).
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for the operation of this station is provided by the Chester County Water Resources Authority and the U.S. Geological Survey.
REMARKS - Records for water year 2014 rated fair except those for estimated daily discharges, which are poor.
Records for water year 2015 rated fair except those for estimated daily discharges, which are poor.
Records for water year 2016 rated fair except those for estimated daily discharges, which are poor.
Records for water year 2017 rated fair.
Records for water year 2018 rated fair except June 5 - 28, and August 13 - Sept 30 and those estimated discharges, which are poor.
Records for water year 2019 rated fair except for missing and estimated periods, which are rated poor.
Records for water year 2020 rated fair.
Records for water year 2015 rated fair except those for estimated daily discharges, which are poor.
Records for water year 2016 rated fair except those for estimated daily discharges, which are poor.
Records for water year 2017 rated fair.
Records for water year 2018 rated fair except June 5 - 28, and August 13 - Sept 30 and those estimated discharges, which are poor.
Records for water year 2019 rated fair except for missing and estimated periods, which are rated poor.
Records for water year 2020 rated fair.
WATER-QUALITY RECORDS
PERIOD OF RECORD - October 2007 to current year.
PERIOD OF DAILY RECORD - pH: October 2007 to October 2014.
REMARKS - pH records for water year 2014 fair except those for the period from May 22 to June 19, which are poor, due to problems with instrumentation.
EXTREMES FOR PERIOD OF RECORD - pH: Maximum, 9.6 standard units, Apr. 19, 2008; minimum, 6.1 standard units, October 25, 26, 2009.
