STATION.--01543900 FIRST FORK SINNEMAHONING CREEK RESERVOIR
LOCATION.--Lat 41`24'25", long 78`01'10", Cameron County, Hydrologic Unit 02050202, at control tower of George B. Stevenson Dam on First Fork Sinnemahoning Creek, 8.0 mi northeast of Sinnemahoning, and 8.0 mi upstream from mouth.
DRAINAGE AREA.--243 square miles.
PERIOD OF RECORD.--January 1956 to current year.
GAGE.--Water-stage recorder and heated tipping bucket precipitation gage. Datum of gage is U.S. Army Corps of Engineers local project datum. Satellite and landline telemetry at gage.
REMARKS.--Reservoir formed by an earthfill dam. Storage began Jan. 31, 1956. Capacity, 75,800 acre-ft between elevations 890.00 ft (sill of outlet gates) and 1,026.00 ft (crest of spillway). No dead storage. Ordinary minimum (conservation) pool elevation is 920.00 ft, capacity, 2,000 acre-ft. Reservoir used for flood control and recreation.

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 this station is provided by the U.S. Army Corps of Engineers, Baltimore District, the Pennsylvania Department of Environmental Protection, and the U.S. Geological Survey.