Funding for this site is provided by:
--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 square miles (includes that of
Monocacy Creek). At site used prior to Oct. 1, 1928, 1,229 square
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
heated tipping bucket precipitation gage. 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.
--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 Protection and the U.S.
--Some regulation at low flow stages from
power operation station upstream. Francis E. Walter Dam will reduce
normal peak flows.
GAGE HEIGHTS OF IMPORTANCE
|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.
Supplied by USGS
: Maximum recordable gage height
(stage sensor 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.