State · Oklahoma · EIA 7490
Grand River Dam Authority
State · Oklahoma · 76 customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 135 minutes/customer.
Reliability verdict
Grand River Dam Authority shows near-benchmark chronic reliability in 2023: 135 minutes SAIDI excluding major events across 76 customers.
- 135 min
- SAIDI 2023
- 0.34
- SAIFI 2023
- 135 min
- SAIDI ex-MED
- 76
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.
What mid-pack Grand River Dam Authority filings show
Grand River Dam Authority is a state utility operating in Oklahoma under EIA identifier 7490. It reports service to approximately 76 customer accounts and generated about $0.24 billion in annual electric revenue.
In 2023, the average Grand River Dam Authority customer experienced 135.4 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). That falls inside the typical 120–180 minute national benchmark, in line with what most U.S. distribution utilities report. SAIFI, the average number of outage events per customer, was 0.34 for the same period, so customers statistically faced roughly 0 distinct interruptions that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 135.4 minutes; the difference from the headline 135.4 shows how much of the outage total came from weather rather than everyday grid issues.
With 4 consecutive years of EIA data (2020–2023), Grand River Dam Authority's reliability record can be judged on trend rather than one isolated year. Over that span, SAIDI rose from 10.4 to 135.4 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
135 min/year per customer
Power-out minutes per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Grand River Dam Authority from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Grand River Dam Authority SAIDI trend
Grand River Dam Authority vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
135 Lower than most fewer outage minutes than 57% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
SAIDI 2023 breakdown: 135.4 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI |
|---|---|---|---|
| 2020 | 10.4 | 10.4 | 0.347 |
| 2021 | 57.3 | 57.3 | 0.734 |
| 2022 | 79.3 | 79.3 | 1.348 |
| 2023 | 135.4 | 135.4 | 0.340 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Frequently Asked Questions
How reliable is Grand River Dam Authority?
Grand River Dam Authority had a SAIDI of 135.4 minutes in 2023. Excluding major weather events, this is near the national average.
What type of utility is Grand River Dam Authority?
Grand River Dam Authority is classified as a State serving Oklahoma.
How many customers does Grand River Dam Authority serve?
Grand River Dam Authority serves approximately 76 customers in Oklahoma.
How has Grand River Dam Authority's reliability changed over time?
Grand River Dam Authority has 4 years of reliability data (2020-2023). SAIDI has held roughly steady across these years. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- State
- State
- Oklahoma
- Customers
- 76
- Annual Revenue
- $0.24B
- EIA ID
- 7490
Explore
Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.