Pensacola Dam was the first hydroelectric facility constructed in Oklahoma.
Grand River Dam Authority (GRDA) construction of the dam began on December 30, 1938 and it was completed in 1940. Located at the junction of Hwy 28 and 82 in Langley, it spans a mile across the Grand River Valley and holds back the 43,500 acres of water that form Grand Lake O’ the Cherokees.
The six units at Pensacola Dam have a combined generation capacity of approximately 120 MW. The dam has 21 floodgates on the main spillway and 21 on the east spillways.
Grand River Dam Authority offers free tours of the historic Pensacola Dam to the general public. During the summer (between Memorial Day and Labor Day holidays), tours are given five days a week, originating from the GRDA Ecosystems & Education Center located by the dam. During those tours, thousands of visitors get an up-close and personal look at this member of the National Register of Historic Places.
East of Junction 28/82 • Langley, OK 74350
GRDA Contact Information
PO Box 409
226 West Dwain Willis Avenue, Vinita, OK 74301