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USGS Water-Year Summary 2024
01521000 ARKPORT RESERVOIR NEAR ARKPORT NY
LOCATION - Lat 42°23'45", long 77°43'08" referenced to North American Datum of 1927, Steuben County, NY, Hydrologic Unit 02050104, 1,000 ft upstream from Arkport Dam, 1.3 mi west of Arkport, and 2.3 mi upstream from small tributary.
DRAINAGE AREA - 30.5 mi².
REVISIONS HISTORY - WSP 1552: 1951-57. WRD NY 1974: 1973. Selected-value daily elevations and mean daily elevations for the period January 1951 to September 2011 were edited for timestamp and database publication errors on Feb. 5, 2025.
SURFACE-WATER RECORDS
PERIOD OF RECORD - January 1951 to September 1960 (daily elevations at 1200 and month-end contents), October 1960 to September 1968 (daily elevations at 2400 and month-end contents), October 1968 to September 1985 (daily mean elevations and month-end contents), October 1985 to May 1991 (month-end elevations and contents), October 2011 to current year (daily mean elevations). Month-end elevations and contents not published June 1991 to September 2011; records for this period are available in the files of the U.S. Geological Survey.
GAGE - Water-stage recorder. Reservoir elevation record is provided in NGVD of 1929 and NAVD of 1988 datums. To convert NGVD of 1929 elevations to NAVD of 1988, subtract 0.43 ft.
REMARKS - Reservoir is formed by earthfill dam with concrete spillway, completed by Corps of Engineers in 1940 for flood control; first used for flood regulation on Mar. 31, 1940. Initial usable capacity, 7,936 acre-ft between elevations 1,218.0 ft (sill of conduit) and 1,304.0 ft (crest of spillway). No dead storage. The flood control works consist of a pressure conduit and a side-channel spillway and are not provided with gates. Water is stored during high flows and released gradually. Reservoir contents unknown since 1992 as a result of periodic dredging. Prior to October 2011, minimum recordable elevation, about 1,227.7 ft; elevation record published below this elevation should not be interpreted as representative of the reservoir water surface elevation. From October 2011 to current year, minimum recordable elevation, 1,227.41 ft.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 1,304.04 ft above NGVD of 1929 (1,303.61 ft above NAVD of 1988), June 23, 1972, contents, 7,944 acre-ft; minimum elevation and contents not determined.
