About Pensacola Dam
Pensacola Dam is an engineering marvel and a must-see attraction at Grand Lake. Completed in 1940, it remains the longest multiple-arch dam in the world, stretching over a mile (6,565 feet) across the Grand (Neosho) River.
The dam was built during the Great Depression as a Public Works Administration project, employing thousands of workers. When completed, it created Grand Lake O' The Cherokees, transforming Northeast Oklahoma and providing flood control, hydroelectric power, and recreation for generations.
Dam History
Construction (1938-1940)
Construction began in 1938 with funding from the Public Works Administration. At its peak, over 3,000 workers were employed on the project. The dam was completed in 1940, and Grand Lake began filling behind it.
Pensacola Dam under construction, July 24, 1939
The Multiple-Arch Design
Unlike conventional dams that use sheer mass to hold back water, Pensacola Dam uses a series of 51 arches that transfer the water's force to the foundation. This innovative design used less concrete while providing exceptional strength.
The distinctive multiple-arch design of Pensacola Dam
Impact on the Region
The creation of Grand Lake transformed Northeast Oklahoma. The 46,500-acre lake with 1,300 miles of shoreline became a recreation destination, economic engine, and source of hydroelectric power for the region.
Visiting the Dam
Location
Pensacola Dam is located on Highway 28 near Langley, Oklahoma, on the south end of Grand Lake.
Viewing Areas
You can view the dam from several public areas:
- Dam overlook on Highway 28
- Spillway viewing area
- Below the dam (great for photography when gates are releasing)
- GRDA Ecosystems Center nearby
Best Times to Visit
- Floodgate releases: When gates are open, water cascading over the spillway is an impressive sight
- Winter: Bald eagles congregate below the dam from November through February
- Sunrise/Sunset: Beautiful lighting for photography
GRDA Ecosystems & Education Center
Located at the west end of Pensacola Dam, the GRDA Ecosystems & Education Center is a free facility dedicated to teaching visitors about Grand Lake's diverse ecosystem. The center features interactive exhibits about the fish, wildlife, and habitats that make Grand Lake unique.
Whether you're a student, teacher, angler, or just curious about nature, the Ecosystems Center offers an engaging look at the natural world of Northeast Oklahoma.
Exhibits & Features
🐟 Aquarium Displays
See live fish species found in Grand Lake, including bass, crappie, catfish, and paddlefish.
🦅 Wildlife Exhibits
Learn about the birds, mammals, and reptiles that call the Grand Lake area home.
💧 Water Ecology
Understand how the lake ecosystem works and GRDA's role in water management.
🎮 Interactive Displays
Hands-on exhibits that engage visitors of all ages.
Visitor Information
- Admission: FREE
- Location: West end of Pensacola Dam, Langley, Oklahoma
- Hours: Contact GRDA for current hours
- Good for: Families, school groups, nature enthusiasts
The center welcomes school groups and offers educational programs. Contact GRDA to arrange a group visit or inquire about special programs.