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.

SURFACE-WATER RECORDS

PERIOD OF RECORD - January 1951 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. Datum of gage is NGVD of 1929. To convert 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. Figures given herein represent usable contents. 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. Minimum recordable elevation, 1227.41 ft.

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 7,944 ac-ft, June 23, 1972, elevation 1,304.04; minimum contents not determined.