Of an estimated 2,418 acres in the project, approximately 329 acres fee required for the lock site which includes 108 acres for fish hatchery, 120 acres for dredge disposal, 50 acres for recreation sites; 10 acres for the abutment site 1,801 acres for flowage easement.
Ohio River, 279.2 miles below Pittsburgh, PA, and 9 miles below the City of Gallipolis, OH. Replaced locks and dams Nos. 24, 25 & 26 on Ohio River and Nos. 9, 10 and 11 on the Kanawha River.
Normal upper pool elevation 538.0' m.s.l., upper pool length is 41.7 miles to Racine Dam on Ohio River and 44.6 miles to Winfield Dam on the Kanawha River. Normal upper pool surface area 12,600 acres, normal lower pool elevation 515.0' m.s.l., (upper pool of Greenup Dam), and normal lift 23.0'.
The project was placed in operation 25 August 1937 and completed in October 1937. Lock replacement construction began Nov 1987 and Completed Jan 1993. Rehab of the dam began in Aug 1992 and was finally completed in 2002. 8 new roller gates, control units, motor control center and electric feeders were replaced. In June 2007 the new handicap fishing access and pier was opened to public, the area of fishing is one of the best spots to fish on the Ohio River
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