Jim Woodruff Dam, Hydroelectric dam in Jackson County, Florida

The Jim Woodruff Dam is a gravity dam and lock on the Apalachicola River, about 300 m south of where the Flint and Chattahoochee rivers meet. It impounds Lake Seminole on the Florida–Georgia border and holds a powerhouse that generates electricity marketed by the Southeastern Power Administration. The lock lets commercial and recreational vessels bypass the dam.

Construction began in 1947 under the U.S. Army Corps of Engineers and the facility became operational in 1957. The project emerged from efforts to harness the Apalachicola River for power generation and water management across the region.

The dam takes its name from James W. Woodruff Sr., a Georgia businessman whose vision shaped the development of the broader Apalachicola-Chattahoochee-Flint water system. This naming reflects the economic interests that drove the creation of such large infrastructure projects in the region.

The dam lies on the Apalachicola River just south of the Flint and Chattahoochee confluence, on the Florida-Georgia line. The lock lets commercial and recreational vessels bypass the dam. The powerhouse roof was damaged by Hurricane Michael in 2018, and downed lines briefly stopped generation.

The lock lets vessels bypass the dam on the Apalachicola River, part of the Apalachicola-Chattahoochee-Flint Project authorized by Congress in the Rivers and Harbors Act of 1946. When Lake Seminole filled, it submerged sites including the U.S. Army's 19th-century Fort Scott. On October 10, 2018, Hurricane Michael damaged the powerhouse roof and downed transmission lines, briefly halting generation.