County annual report · FIPS 17023
2017 Clark County, IL Power Outage Report
In 2017, customers in Clark County, IL went without power for an average of 1.1 hours, a total of 8,805 customer-hours (Illinois average 1.4 hours). That ranks 48th worst of 102 Illinois counties and 1996th of 2,786 nationally.
Compared with IL, the US and 2016
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Clark County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 11, 2017 02:15 | May 11, 2017 06:30 | 4h 15m | 685 | 2,146 |
| 2 | March 7, 2017 09:00 | March 7, 2017 12:30 | 3h 30m | 671 | 2,011 |
| 3 | November 15, 2017 09:15 | November 15, 2017 10:00 | 45m | 661 | 496 |
| 4 | April 26, 2017 22:00 | April 27, 2017 00:45 | 2h 45m | 633 | 665 |
| 5 | January 23, 2017 15:30 | January 23, 2017 17:00 | 1h 30m | 342 | 513 |
| 6 | January 3, 2017 18:15 | January 3, 2017 19:45 | 1h 30m | 340 | 341 |
| 7 | April 10, 2017 20:30 | April 10, 2017 22:45 | 2h 15m | 337 | 171 |
| 8 | April 22, 2017 18:00 | April 22, 2017 19:45 | 1h 45m | 337 | 435 |
| 9 | April 29, 2017 17:15 | April 29, 2017 18:45 | 1h 30m | 337 | 422 |
| 10 | May 4, 2017 13:45 | May 4, 2017 15:15 | 1h 30m | 337 | 506 |
Outage episodes by size in 2017: 13 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 2017, 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 | 2017 | 3.2 hrs | 1.12 | 2.0 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 n/a of Illinois's customers in 2017; 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, 2017, 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/2017/illinois/clark-county