STATION.--01478137 TROUT RUN AT AVONDALE, PA
LOCATION.--Lat 39`49'18", long 75`46'46", Chester County, Hydrologic Unit 02040205, 30 ft upstream from bridge at State Route 41, in Avondale Boro.
DRAINAGE AREA.--1.34 square miles.
PERIOD OF RECORD.--1997-1998. December 2019 to current year. Ungaged Chester County Biological Monitoring site 2002, 2011.
GAGE.--Water-stage recorder, crest-stage gage, and water-quality monitor. Datum of gage is 266.38 ft. above North American Vertical Datum of 1988, from single-base GNSS static survey. Satellite telemetry at station. Prior to March 14, 2022, the datum of gage was erroneously reported as 270 ft above North American Vertical Datum of 1929.
COOPERATION.--Station established and maintained by the U.S. Geological Survey. Funding for this station is provided by the U.S. Geological Survey.