--01452000 JORDAN CREEK AT ALLENTOWN,
--Lat 40`37'23", long
75`28'58", Lehigh County, Hydrologic Unit 02040106, on 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.
PERIOD OF RECORD.
--October 1944 to current year.
--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.
GAGE HEIGHTS OF IMPORTANCE
Supplied by USGS
: Data transmitter operational limit -
Supplied by NWS
: Action stage-6 ft, at 7.1 ft, Rte 309
in Whitehall Twp closed; Flood stage-8 ft, Village Road in S Whitehall
flooded; Moderate flood stage-10 ft; Major flood stage-11 ft, at 13 ft,
Seventh Street bridge flooded.
EXTREMES OUTSIDE PERIOD OF RECORD.
--Flood of May 23,
1942, reached a stage of approximately 7.1 ft, from floodmarks 650 ft
--Station established and maintained by
the U.S. Geological Survey. Funding for the operation of this station
is provided by the City of Allentown, the Pennsylvania Department of
Environmental Protection, and the U.S. Geological Survey through the
Cooperative Water Program.