From U.S. Route 23 take Route 3 east which becomes Route 321, then turn right onto Route 3 and go 1.9 miles to Route 302. Take Route 302 to the Dewey Lake Project Office/ Visitor Center. Dewey Lake is part of the integrated flood reduction system operated by the Corp of Engineers for the entire Ohio River Basin. When the lakes in this system are operated as a vast storage system, flood crests along the Ohio can be significantly reduced. Construction of Dewey Dam began in 1946 and was completed in 1949. The dam is rolled earth-fill with an uncontrolled saddle spillway. The cost of the dam was $6,051,400. The length of the lake is 18.5 miles upstream from the dam. The watershed is 207 square miles. In the intake structure, there are three 5' x 10' caterpillar control gates. The outflow is an 11 foot diameter horseshoe tunnel. Summer Pool Elevation is 650.0 m.s.l. which is 1,100 acres. Winter Pool Elevation is 645.0 m.s.l. The auxiliary spillway is located at Hager Gap at Terry's boat launch ramp. Construction began in 2000 and was completed in 2002. Approximately 150,000 cubic yards of rock was removed from the site. This spillway will allow a maximum of 178,000 cubic feet of water per second to flow through it. The highest flood on record was 3 March 1955 (682.32 m.s.l) The most recent flood was 19 February 2003 (667.90 m.s.l.). Dewey Lake and Jenny Wiley State Resort Park have many facilities for visitor recreation and assistance: Marina, May Lodge and Cabins, Convention Center, Golf Course, Swimming Pool,theatre, Jenny Wiley State Resort Park Campground, and Corps of Engineers: Game laws are enforced by Kentucky Department of Fish and Wildlife conservation/boating officers. Fishing is allowed from boats and shoreline in and along Dewey Lake. Game fish occurring are bass, crappie, brim, catfish and muskie. Kentucky fishing licenses are required. Universally Accessible Facilities are provided at the Project Office, German Area Campground, Downstream Recreation Area, Jenny Wiley State Park Campground, May Lodge and the Wilkinson Stumbo Convention Center. Jenny Wiley State Resort Park Marina, located near the May Lodge and the Wilkinson Convention Center, provides visitors with docking facilities, boat launching facilities, restrooms and party barge rentals. Picnic shelters are located at the Downstream Recreation Area and Picnic Hollow. All shelters are available on a first come first serve basis EXCEPT WHEN RESERVED IN ADVANCE. There are no designated swimming beaches located on Dewey Lake. Swim at your own risk. Jenny Wiley State Resort Park does provide a swimming pool adjacent to Dewey Lake on Route 302. Lifeguards are provided. Constructed primarily for flood control, Dewey Dam was built on Johns Creek, a 99-mile-long tributary of the Levisa Fork of the Big Sandy River. Work began in1948, but was stopped during World War II and the Korean War. The lake 1,110 acre lake with 52 miles of shoreline was impounded in 1957. Jenny Wiley State Resort Park Marina is located near May Lodge on the southeastern portion of Dewey Lake. The marina, open seasonally from April to November, offers full service. Paved boat ramps are located at Jenny Wiley State Resort Park Marina, Goble Branch Boat Launch, Stratton Branch Boat Launch and Terry Boat Launch.
Dewey Lake, located near Prestonsburg, Kentucky in Floyd County, is part of the integrated flood reduction system operated by the United States Army Corps of Engineers for the entire Ohio River Basin.[1] The 1,100-acre (4 km2) lake was formed by impounding John's Creek in 1949, and was named for either Admiral George Dewey or local resident Dewey Wells.[2]