Pensacola, also known as Grand Lake, is a captivating hydroelectric dam located in Mayes County, Oklahoma.
Wind
Humidity
Built in 1940, this multi-arch dam stands at an impressive height of 155 feet and spans a length of 6565 feet. With a maximum storage capacity of 2,197,000 acre-feet and a normal storage level of 1,630,000 acre-feet, Pensacola plays a crucial role in flood risk reduction and hydroelectric power generation in the region.
The dam's controlled spillway, with a width of 1,512 feet, ensures effective water management during times of high discharge. The associated structures include 21 Tainter (radial) outlet gates, enhancing the dam's operational efficiency. Despite its high hazard potential and very high risk assessment rating, Pensacola's condition assessment is currently not available, highlighting the need for ongoing monitoring and maintenance efforts to ensure the safety and stability of this vital water resource infrastructure.
Managed by the Federal Energy Regulatory Commission, Pensacola serves as a key landmark in the Tulsa District, contributing to the overall water resource management and climate resilience efforts in the area. As water resource and climate enthusiasts, understanding the importance of dams like Pensacola in supporting sustainable development and environmental conservation is essential for fostering a resilient and secure future for our communities.
Year Completed |
1940 |
Dam Length |
6565 |
Dam Height |
155 |
River Or Stream |
Neosho |
Primary Dam Type |
Multi-Arch |
Surface Area |
46500 |
Hydraulic Height |
143 |
Drainage Area |
10192 |
Nid Storage |
2197000 |
Structural Height |
151 |
Outlet Gates |
Tainter (radial) - 21 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
155 |
Neosho River Near Langley
|
135cfs |
Spavinaw Creek Near Eucha
|
163cfs |
Big Cabin Creek Near Big Cabin
|
54cfs |
Beaty Creek Near Jay
|
12cfs |
Neosho River Near Chouteau
|
273cfs |
Honey Creek Near South West City
|
14cfs |