STATION.--03035500 MAHONING CREEK RESERVOIR AT MAHONING CREEK DAM, PA.
LOCATION.--Lat 40`55'18", long 79`16'41", Armstrong County.
DRAINAGE AREA.--340 square miles.
GAGE.--Water-stage recorder and heated tipping bucket precipitation gage. Datum of gage is referenced to North American Vertical Datum 1988 (NAVD88), US Army Corps of Engineers benchmark. Prior to October 2009, datum of gage was referenced to National Geodetic Vertical Datum of 1929 (NGVD29). Satellite telemetry at station.
REMARKS.--Reservoir is formed by concrete gravity dam with a gated spillway. Storage began during construction sometime prior to June 15, 1941 and first reached minimum pool elevation, (1,074.14 ft, capacity, 44,800 acre-ft) on June 21, 1941. Capacity 74,100 acre-ft between elevations 1,014.14 ft (sill of outlet gates) and 1,161.14 ft (full pool); dead storage, 100 acre-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.

COOPERATION.--Funding for the operation of this station is provided by the U.S. Army Corps of Engineers, Pittsburgh District.