Lake Seminole, Reservoir in Florida, United States.

Lake Seminole is a 37,500-acre reservoir on the Georgia–Florida border, held back by the Jim Woodruff Lock and Dam where the Chattahoochee and Flint rivers meet to form the Apalachicola. The dam is a long concrete barrier with a curved guide wall at its eastern end, a row of paired piers carrying vertical metal gates, and a wider blockhouse at the western end. Its single lock measures 450 by 82 feet.

Congress authorized the Jim Woodruff Lock and Dam Project in the Rivers and Harbors Act of 1946, and construction began in 1947. The dam was completed in 1952 and the lake opened in 1957, at a final cost of $46.5 million against an expected $29 million. The dam honors James W. Woodruff, Sr., a Georgia businessman who led the Apalachicola-Chattahoochee-Flint project.

The name comes from the Seminole people who once lived across this region before European settlers arrived. Anglers and boaters gather at the water while families picnic along the wooded shores and watch birds nesting among the treetops.

Several boat ramps and camping areas sit along the shoreline, allowing visitors to explore different sections of the reservoir. The area works well for fishing and water trips throughout the year, though spring and fall offer milder temperatures.

A third river, the Apalachicola, begins right at the dam outlet and flows south toward the Gulf of Mexico. This arrangement makes the reservoir a meeting point for three river systems in one spot.