Cooperative · Illinois · EIA 16196
Rock Energy Cooperative
Cooperative · Illinois · 10K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 25 minutes/customer.
Reliability verdict
Rock Energy Cooperative shows above-average chronic reliability in 2023: 7 minutes SAIDI excluding major events (25 minutes including them) across 10K customers.
- 25 min
- SAIDI 2023
- 0.34
- SAIFI 2023
- 7 min
- SAIDI ex-MED
- 10K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: short interruption minutes vs the 911 utility cohort (≤96 min tercile cut).
What short-outage Rock Energy Cooperative filings show
Rock Energy Cooperative is a member-owned electric cooperative operating in Illinois under EIA identifier 16196. It reports service to approximately 10,386 customer accounts and generated about $0.03 billion in annual electric revenue, with a service footprint spanning 40 ZIP codes. As a cooperative, its governance is accountable to its ratepayer-members rather than shareholders, which often shapes rate-setting and reinvestment priorities.
In 2023, the average Rock Energy Cooperative customer experienced 25.5 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. Over the same period, SAIFI (outage events per customer) was 0.34, putting the typical customer at roughly 0 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 7.3 minutes, the gap between that figure and the headline 25.5 reveals how much weather, not day-to-day infrastructure, drove outages.
With 4 consecutive years of EIA data (2020–2023), Rock Energy Cooperative's reliability record can be judged on trend rather than one isolated year. SAIDI has increased from 18.6 to 25.5 minutes, which may reflect either worsening weather exposure or delayed grid modernization.
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.
25 outage minutes per customer annually
Power-out minutes per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Rock Energy Cooperative from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Rock Energy Cooperative SAIDI trend
Rock Energy Cooperative vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
25 Among the lowest fewer outage minutes than 92% 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
Price vs. reliability
Where Rock Energy Cooperative sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Rock Energy Cooperative charges more per customer than 54% of them, and is more reliable (lower SAIDI) than 94% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,605/year · Latest SAIDI: 25.5 minutes/year.
SAIDI 2023 breakdown: 25.5 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 18.6 | - | 0.185 | 11,494 |
| 2021 | 17.5 | - | 0.170 | 11,538 |
| 2022 | 13.3 | - | 0.180 | 10,386 |
| 2023 | 25.5 | 7.3 | 0.338 | 10,507 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Rock Energy Cooperative serves 40 ZIP codes in Illinois.
Frequently Asked Questions
How reliable is Rock Energy Cooperative?
Rock Energy Cooperative had a SAIDI of 25.5 minutes in 2023 including major weather events, but 7.3 minutes excluding them (the IEEE-standard day-to-day reliability measure, the difference points to a major storm that year rather than an ongoing problem). Excluding major storm impacts, this beats the national average, a sign of above-average reliability.
What type of utility is Rock Energy Cooperative?
Rock Energy Cooperative is classified as a Cooperative serving Illinois.
How many customers does Rock Energy Cooperative serve?
Rock Energy Cooperative serves approximately 10,386 customers in Illinois.
How has Rock Energy Cooperative's reliability changed over time?
Rock Energy Cooperative has 4 years of reliability data (2020-2023). This utility's SAIDI has stayed fairly flat over the period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- Cooperative
- State
- Illinois
- Customers
- 10,386
- Annual Revenue
- $0.03B
- EIA ID
- 16196
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Rock Energy Cooperative. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (10K here), outside Illinois.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (25.5 here), outside Illinois, excluding the customer-peer set.
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.