USGS Water-Year Summary 2024

03216600 OHIO RIVER AT GREENUP DAM, KY

LOCATION - Lat 38°38'48", long 82°51'38" referenced to North American Datum of 1927, Greenup County, KY, Hydrologic Unit 05090103, on Ohio River, at left bank at downstream end of lock guidewall in lower pool at Greenup Locks, 1.1 miles upstream from Grays Branch, 4.7 miles downstream from Little Sandy River, 5.0 miles north of Greenup, and at mile 341.5.

DRAINAGE AREA - 62,000 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1968 to current year.

GAGE -

Tailwater:  Water-stage recorder.  Datum is 471.85 feet above NAVD of 1988, 472.51 ft above NGVD of 1929, and 472.97 above Ohio River Datum (COE 1912).  Auxiliary water-stage recorder is located in Portsmouth, Ohio, 14.1 miles downstream.

Headwater:  Water-stage recorder.  Datum is 501.89 feet above NAVD of 1988 and 502.51 ft above NGVD of 1929.

COOPERATION - U.S. Army Corps of Engineers, Huntington, WV District.

REMARKS - Records good except for those estimated and for discharges less than 20,000 ft³/s, which are poor. Flow regulated by Ohio River system of locks, dams, and reservoirs upstream from station.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height 56.76' on March 13, 2011; maximum discharge 520000 ft³/s on March 4, 1997. Lowest mean daily discharge 2720 ft³/s on October 7, 2007.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1974 to September 1986, 1997 to current water year.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE:October 1974 to September 1981. WATER TEMPERATURES:October 1974 to September 1981.

REMARKS - Flow regulated by Ohio River system of locks, dams, and reservoirs. (National stream-quality accounting network station)