--01453000 LEHIGH RIVER AT BETHLEHEM,
--Lat 40`36'55", long
75`22'45", Lehigh County, Hydrologic Unit 02040106, on left
bank 110 ft upstream from bridge on New Street at Bethlehem, and 1,800
ft upstream from Monocacy Creek. Records include flow of Monocacy
--1,279 mi2 (includes that of Monocacy
Creek). At site used prior to Oct. 1, 1928, 1,229 mi2.
PERIOD OF RECORD.
--October 1902 to January 1905, May
1909 to current year. Monthly discharge only for some periods,
published in WSP 1302. Published as "at South Bethlehem"
prior to October 1913.
--Water-stage recorder, crest-stage gage, and
climatological sensor. Datum of gage is 210.94 ft above National
Geodetic Vertical Datum of 1929. Prior to October 1928, non-recording
gage at New Street bridge 120 ft downstream at same datum. Oct. 1,
1928, to Sept. 30, 1962, water-stage recorder at site 4,250 ft
downstream at datum 2.49 ft lower. Oct. 1, 1963, to Dec. 14, 1975,
water-stage recorder at site 40 ft downstream at same datum. Satellite
and landline telemetry at station.
GAGE HEIGHTS OF IMPORTANCE
Supplied by USGS
: Maximum recordable gage height
(stage sensor operational limt) - 25.7 ft; Data transmitter operational
limit - 26.5 ft;
Supplied by NWS
: Action stage-12 ft, at 14 ft,
flooding begins upstream in Allentown; backwater affects Little Lehigh
and Jordan Creeks; Flood stage-16 ft, Wilson Avenue takes on water;
Moderate flood stage-20 ft; Major flood stage-22 ft, at 25 ft, levees
in Bethlehem are topped.
EXTREMES OUTSIDE PERIOD OF RECORD.
--Flood of Feb. 28,
1902 reached a stage of 24.9 ft, from floodmark, present site and
datum, discharge, about 88,000 ft3/s.
--Station established and maintained by
the U.S. Geological Survey. Funding for the operation of this station
is provided by the U.S. Army Corps of Engineers, Philadelphia District,
the Pennsylvania Department of Environmental Resources, and the U.S.
Geological Survey through the Cooperative Water Program.
|The 15-minute precipitation data for this station are
temporary and will only be displayed for 120 days. Time series
of 1-hour or cumulative daily values will NOT be available for
retrieval following the 120-day display period. Although the
instrumentation is calibrated at least once a year, the temporary
classification means that documented routine inspections and other
quality assurance measures are not performed that would make the
data acceptable for archival, retrieval, or future use in general
scientific or interpretive studies.