Grand River Dam Authority
State electric utility · Oklahoma · #3,109 of 3,199 U.S. utilities by customers · EIA utility #7490
Grand River Dam Authority is a state electric utility serving 78 customers in Oklahoma. In 2025 it sold 5,091 gigawatt-hours of electricity for $252.12M in revenue, an average realized rate of 4.95¢ per kWh across all customer classes and — per kWh for residential customers. Its reported service territory covers 1 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Commercial | 49 | 9.3 | $821.50K | 8.84¢ | |
| Industrial | 29 | 5,082 | $251.30M | 4.95¢ | |
| Total | 78 | 5,091 | $252.12M | 4.95¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (— kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 78 | 3,277 | $167.19M | — |
| 2022 | 78 | 3,641 | $228.82M | — |
| 2023 | 76 | 4,026 | $241.06M | — |
| 2024 | 79 | 4,280 | $210.03M | — |
| 2025 | 78 | 5,091 | $252.12M | — |
Reliability (2025)
Average outage time (SAIDI): 13 minutes per customer per year
Average outages (SAIFI): 0.32 per customer
Average restoration time (CAIDI): 42 minutes
As reported for Oklahoma under the Other standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 6,290 GWh
Wholesale power purchased: 4,193 GWh
Winter peak demand: 1,072 MW
Energy losses: 4.3% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 92.2% of 192 meters
Counties served
Mayes, OK
Other large utilities in Oklahoma
- Oklahoma Gas & Electric Co - 909,620 customers, residential 12.43¢
- Public Service Co of Oklahoma - 588,941 customers, residential 14.23¢
- Oklahoma Electric Coop Inc - 65,196 customers, residential 12.87¢
- City of Edmond - (OK) - 44,881 customers, residential 10.73¢
- Northeast Oklahoma Electric Co - 42,301 customers, residential 13.79¢
- Verdigris Valley Elec Coop Inc - 39,439 customers, residential 12.40¢
- East Central Oklahoma Elec Coop Inc - 37,718 customers, residential 13.59¢
- Tri-County Electric Coop, Inc (OK) - 31,996 customers, residential 15.95¢
All Oklahoma utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #7490 in the EIA frame.