County annual report · FIPS 17017
2015 Cass County, IL Power Outage Report
In 2015, customers in Cass County, IL went without power for an average of 1.3 hours, a total of 7,760 customer-hours (Illinois average 2.3 hours). That ranks 66th worst of 100 Illinois counties and 1610th 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 Cass 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 | May 15, 2015 22:30 | May 15, 2015 23:45 | 1h 15m | 1,523 | 1,212 |
| 2 | November 18, 2015 07:15 | November 18, 2015 15:00 | 7h 45m | 780 | 1,395 |
| 3 | September 8, 2015 18:30 | September 8, 2015 19:30 | 1h | 775 | 408 |
| 4 | June 27, 2015 15:00 | June 27, 2015 18:00 | 3h | 347 | 748 |
| 5 | July 14, 2015 00:15 | July 15, 2015 19:00 | 1d 18h | 266 | 1,798 |
| 6 | July 11, 2015 20:00 | July 11, 2015 21:30 | 1h 30m | 133 | 72 |
| 7 | June 9, 2015 14:45 | June 9, 2015 15:00 | 15m | 117 | 29 |
| 8 | June 24, 2015 13:30 | June 24, 2015 20:45 | 7h 15m | 102 | 184 |
| 9 | September 11, 2015 17:00 | September 11, 2015 17:30 | 30m | 88 | 44 |
| 10 | November 21, 2015 17:00 | November 21, 2015 20:45 | 3h 45m | 70 | 59 |
Outage episodes by size in 2015: 8 reached 100+ customers, 1 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 Cass 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 | - | - | - | - | - |
| Illinois Rural Electric Coop | - | - | - | - | - |
| Menard Electric Coop | - | - | - | - | - |
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 ÷ 6,087 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. Cass County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cass 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/cass-county