USGS 01478137 Trout Run at Avondale, PA

PROVISIONAL DATA SUBJECT TO REVISION

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Station gage imageSTATION.--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.
This station managed by the PAWSC Downingtown Field Office.

Available Parameters Available Period
  
2019-12-04  2026-02-21
2019-12-04  2026-02-21
2019-12-04  2026-02-21
2019-12-04  2026-02-21
2023-02-21  2026-02-21
2020-07-23  2022-10-02







 (7)
 
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Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
Most recent instantaneous value: 6.1 02-21-2026   12:15 EST
Graph of Temperature, water, degrees Celsius

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Discharge, cubic feet per second
Most recent instantaneous value: 1.80 02-21-2026   12:15 EST
Graph of Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Feb 21 based on 7 water years of record more
Min
(2025)		 25th
percen-
tile		 Mean Median 75th
percen-
tile		 Most Recent
Instantaneous
Value Feb 21		 Max
(2024)
0.63 0.96 1.4 1.5 1.6 1.80 1.96

Gage height, feet
Most recent instantaneous value: 1.95 02-21-2026   12:15 EST
Graph of Gage height, feet

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 582 02-21-2026   00:30 EST
Graph of Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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Stream water level elevation above NAVD 1988, in feet, [Gage Height - NAVD88]
Most recent instantaneous value: 268.33 02-21-2026   12:15 EST
Graph of Stream water level elevation above NAVD 1988, in feet, [Gage Height - NAVD88]

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
 
-- Data temporarily unavailable for the time period specified --