County annual report · FIPS 17023
2015 Clark County, IL Power Outage Report
In 2015, customers in Clark County, IL went without power for an average of 0.4 hours, a total of 3,316 customer-hours (Illinois average 2.3 hours). That ranks 91st worst of 100 Illinois counties and 2115th of 2,484 nationally.
Compared with IL, the US
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Clark County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 14, 2015 07:30 | July 14, 2015 08:00 | 30m | 687 | 344 |
| 2 | December 14, 2015 07:00 | December 14, 2015 09:00 | 2h | 324 | 349 |
| 3 | June 20, 2015 12:00 | June 20, 2015 13:15 | 1h 15m | 323 | 327 |
| 4 | July 4, 2015 12:15 | July 4, 2015 20:15 | 8h | 319 | 1,598 |
| 5 | November 6, 2015 05:30 | November 6, 2015 08:30 | 3h | 55 | 73 |
| 6 | June 10, 2015 01:00 | June 10, 2015 03:15 | 2h 15m | 54 | 120 |
| 7 | June 8, 2015 03:45 | June 8, 2015 18:45 | 15h | 38 | 197 |
| 8 | September 25, 2015 23:30 | September 26, 2015 01:15 | 1h 45m | 33 | 28 |
| 9 | June 26, 2015 17:00 | June 26, 2015 18:30 | 1h 30m | 25 | 9 |
| 10 | April 16, 2015 12:00 | April 16, 2015 18:30 | 6h 30m | 12 | 52 |
Outage episodes by size in 2015: 4 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 2015, 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 | 2015 | 5.9 hrs | 1.39 | 2.2 hrs | 1.04 |
| 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 2015; 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, 2015, 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/2015/illinois/clark-county