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130.1 MW Hydro operating in Mayes, OK — Southwest Power Pool
130.1 MW
Nameplate Capacity
7
Generators
units
Conventional Hydroelectric
Technology
1940
Operating Since
Coordinates
36.4675, -95.0414
County
Mayes, OK
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Grand River Dam Authority | Grand River Dam Authority | — |
| Owner(s) | Grand River Dam Authority | Grand River Dam Authority | — |
| Status | Operating | operating | — |
The Pensacola Dam, also known as the Grand River Dam, is a multiple-arch buttress dam located between the towns of Disney and Langley on the Grand River in Mayes County, Oklahoma. The dam is operated by the Grand River Dam Authority and creates Grand Lake o' the Cherokees. After decades of vision and planning, it was constructed between 1938 and 1940 for the purposes of hydroelectric power generation, flood control and recreation. It is Oklahoma's first hydroelectric power plant and is referred to as the longest multiple-arch dam in the world.
Read more on WikipediaThe Pensacola hydroelectric plant is located in Mayes County, Oklahoma. The plant, which began operating in 1940, has a total capacity of 130.1 MW across seven generators. It is owned and operated by the Grand River Dam Authority. The primary fuel source is water, and the plant utilizes conventional hydroelectric technology. Pensacola is the second-largest of five hydroelectric plants in Oklahoma, and ranks 149th out of 194 nationally.
Pensacola operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region. The plant's latest annual generation was 349,131 MWh, resulting in a capacity factor of 30.7%. Financial data indicates a power purchase agreement (PPA) price of $8.5 per MWh, as reported to FERC.
Generated from EIA, GEM, and public data sources
ISO/RTO
SPP
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
10.0K MWh
Latest Month
349.1K MWh
Annual Generation
30.7%
Capacity Factor
Grand River Dam Authority · Data from 2019–2025
$8.5/MWh
PPA Price
Market Position
ISO/RTO Market
SPP
LMP Node
GRDAPENSA1UN1
Pricing Hub
SPP South Hub
Node Source
EIA-860 direct report
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about PensacolaSouthwest Power Pool (SWPP)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
State
Sector
Electric Utility