--03049500 ALLEGHENY RIVER AT NATRONA,
--Lat 40`36'55", long
79`43'07", Allegheny County, Hydrologic Unit 05010009, on
right bank 520 ft upstream from dam at lock 4 at Natrona, 5.8 mi
downstream from Kiskiminetas River, and at mile 24.3.
--11,410 square miles.
PERIOD OF RECORD.
--October 1938 to current year.
--Water-stage recorder, non-heated tipping bucket
precipitation gage, and concrete dam control. Datum of gage is 736.36
ft above National Geodetic Vertical Datum of 1929. (U.S. Army Corps of
Engineers bench mark). Prior to Apr. 14, 1940, non-recording gage and
Apr. 15, 1940 to Oct. 22, 1990, water-stage recorder at same site at
datum 0.75 ft higher. Satellite telemetry at station.
--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 U.S. Army Corps of Engineers, Pittsburgh District and the U.S.
--Sharp rises and drops in gage height
displayed on graphs for some of the Allegheny River gages are caused by
hydroelectric power producers passing relatively large amounts of
GAGE HEIGHTS OF IMPORTANCE.-
Supplied by NWS:
Action stage-17.2 ft; Flood stage-21
ft; Moderate flood stage-24 ft; Major flood stage-26 ft.
|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.