County annual report · FIPS 17023
2018 Clark County, IL Power Outage Report
In 2018, customers in Clark County, IL went without power for an average of 0.7 hours, a total of 5,714 customer-hours (Illinois average 2.5 hours). That ranks 91st worst of 102 Illinois counties and 2424th of 2,798 nationally.
Compared with IL, the US and 2017
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Clark County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 3, 2018 09:00 | April 3, 2018 12:30 | 3h 30m | 368 | 519 |
| 2 | October 27, 2018 02:30 | October 27, 2018 04:15 | 1h 45m | 364 | 394 |
| 3 | September 8, 2018 17:15 | September 9, 2018 02:30 | 9h 15m | 361 | 344 |
| 4 | September 2, 2018 21:30 | September 3, 2018 00:30 | 3h | 308 | 426 |
| 5 | August 21, 2018 05:15 | August 21, 2018 06:45 | 1h 30m | 293 | 367 |
| 6 | November 25, 2018 22:15 | November 26, 2018 06:15 | 8h | 290 | 750 |
| 7 | July 20, 2018 00:30 | July 20, 2018 14:00 | 13h 30m | 278 | 1,506 |
| 8 | November 27, 2018 13:45 | November 27, 2018 14:15 | 30m | 269 | 69 |
| 9 | August 29, 2018 01:45 | August 29, 2018 08:45 | 7h | 170 | 713 |
| 10 | June 28, 2018 00:45 | June 28, 2018 02:45 | 2h | 111 | 222 |
Outage episodes by size in 2018: 10 reached 100+ customers, 0 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Clark County reported on EIA Form 861 for 2018, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2018 | 3.5 hrs | 1.06 | 1.8 hrs | 0.90 |
| Ameren | - | - | - | - | - |
| Norris Electric Coop | - | - | - | - | - |
| Coles-Moultrie Electric Coop | - | - | - | - | - |
| Enerstar Power Corp | - | - | - | - | - |
| City of Casey - (IL) | - | - | - | - | - |
| City of Marshall - (IL) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 92% of Illinois's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,829 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Clark County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clark County, IL annual power outage report, 2018, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2018/illinois/clark-county