STATION.--01478120 EAST BRANCH WHITE CLAY CREEK AT AVONDALE, PA
LOCATION.--Lat 39`49'42", long 75`46'52", Chester County, Hydrologic Unit 02040205, at Third Street bridge in Avondale Borough, 2,000 ft upstream from State Route 41.
DRAINAGE AREA.--11.3 square miles.
PERIOD OF RECORD.--October 2007 to current year. Ungaged Chester County Biological Monitoring site since 1969.
GAGE.--Water-stage recorder, crest-stage gage, and water-quality monitor. Datum of gage is 264.65 ft above North American Vertical Datum of 1988, from single-base GNSS static survey. Prior to March 10, 2022, the datum of gage was erroneously reported as 270 ft above National Geodetic Vertical Datum of 1929.
COOPERATION.--Funding for this station is provided by the Chester County Water Resources Authority, the Chester County Emergency Management Services, the U.S. Geological Survey.