County annual report · FIPS 26027
2015 Cass County, MI Power Outage Report
In 2015, customers in Cass County, MI went without power for an average of 47.9 hours, a total of 164K customer-hours (Michigan average 6.8 hours). That ranks 10th worst of 80 Michigan counties and 48th of 2,484 nationally.
Compared with MI, the US
Coverage line is EAGLE-I's share of Michigan 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 | December 28, 2015 20:30 | December 30, 2015 21:45 | 2d 1h | 1,889 | 17K |
| 2 | August 17, 2015 22:30 | August 18, 2015 21:00 | 22h 30m | 1,700 | 6,791 |
| 3 | February 25, 2015 18:00 | February 27, 2015 02:00 | 1d 8h | 1,317 | 15K |
| 4 | September 13, 2015 08:00 | September 13, 2015 11:15 | 3h 15m | 1,307 | 4,077 |
| 5 | April 2, 2015 18:30 | April 3, 2015 08:00 | 13h 30m | 1,295 | 8,369 |
| 6 | August 15, 2015 03:00 | August 16, 2015 03:45 | 1d | 1,243 | 16K |
| 7 | September 9, 2015 00:15 | September 9, 2015 02:15 | 2h | 1,239 | 2,129 |
| 8 | May 31, 2015 00:45 | May 31, 2015 20:15 | 19h 30m | 1,238 | 7,799 |
| 9 | November 21, 2015 16:30 | November 23, 2015 16:15 | 1d 23h | 1,219 | 20K |
| 10 | October 23, 2015 08:15 | October 23, 2015 11:45 | 3h 30m | 1,119 | 3,917 |
Outage episodes by size in 2015: 51 reached 100+ customers, 11 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 |
|---|---|---|---|---|---|
| Indiana Michigan Power Co | 2015 | 7.6 hrs | 1.49 | 3.9 hrs | 1.26 |
| Midwest Energy Cooperative - (MI) | 2014 | 9.8 hrs | 2.23 | 4.9 hrs | 1.87 |
| Wolverine Power Supply Coop | - | - | - | - | - |
| City of Dowagiac | - | - | - | - | - |
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 Michigan's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,423 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, MI 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/michigan/cass-county