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130.1 MW Hydro operating in Mayes, OK
130.1 MW
Nameplate Capacity
7
Generators
units
Conventional Hydroelectric
Technology
1940
Operating Since
Coordinates
36.4675, -95.0414
County
Mayes, OK
Nearby Plants
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| 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
Southwest Power Pool (SWPP)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
State
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
10.0K MWh
Latest Month
349.1K MWh
Annual Generation
30.7%
Capacity Factor
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Historic financial signal for this asset — PPA, LCOE, market value where reported. The base for forward bankability and insurance analytics on the InfraSure platform.
Grand River Dam Authority · Data from 2019–2025
$8.5/MWh
PPA Price
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
SPP
LMP Node
GRDAPENSA1UN1
Pricing Hub
SPPSOUTH_HUB
Node Source
EIA-860 direct report
20 buyers • 24 active contracts
+ 15 more offtakers in the full bridge. Top 5 shown.
Browse source data on FERC EQRLast updated 2026-03-26
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