USGS Water-Year Summary 2020
01452000 JORDAN CREEK AT ALLENTOWN, PA
LOCATION - Lat 40°37'23", long 75°28'58" referenced to North American Datum of 1927, Lehigh County, PA, Hydrologic Unit 02040106, on the right bank, 200 ft upstream from bridge on State Highway 145, 0.5 mi northwest of city limits of Allentown, and 2.5 mi upstream from mouth.
DRAINAGE AREA - 75.8 mi².
- WDR PA-76-1: 1970(M), 1971.
PERIOD OF RECORD - October 1944 to current year.
GAGE - Water-stage recorder, crest-stage gage. Datum of gage is 257.82 ft above National Geodetic Vertical Datum of 1929 (Pennsylvania Department of Transportation datum). Prior to September 17, 2013, gage included rubble masonry control at datum 2.0 ft higher. For history of changes prior to September 17, 2013, refer to WDR-US-2012. Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for the operation of this station is provided by the Pennsylvania Department of Environmental Protection, the Lehigh County Authority, and the U.S. Geological Survey.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of May 23, 1942, reached a stage of approximately 7.1 ft, from floodmarks 650 ft downstream.