STATION.--03049500 ALLEGHENY RIVER AT NATRONA, PA
LOCATION.--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.
DRAINAGE AREA.--11,410 square miles.
PERIOD OF RECORD.--October 1938 to current year.
GAGE.--Water-stage recorder, non-heated tipping bucket precipitation gage, and concrete dam control. Datum of gage is 735.8 ft above North American Vertical Datum of 1988. 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. Prior to February 15, 2024, the datum of gage was reported as 736.36 ft above National Geodetic Vertical Datum of 1929. 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 U.S. Army Corps of Engineers, Pittsburgh District and the U.S. Geological Survey.
REMARKS.--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 streamflow. ,/table>
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.