County annual report · FIPS 26027
2018 Cass County, MI Power Outage Report
In 2018, customers in Cass County, MI went without power for an average of 74.8 hours, a total of 256K customer-hours (Michigan average 10.0 hours). That ranks 2nd worst of 80 Michigan counties and 81st of 2,798 nationally.
Compared with MI, the US and 2017
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Cass 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 | October 20, 2018 17:45 | October 24, 2018 14:15 | 3d 20h | 2,900 | 22K |
| 2 | July 5, 2018 04:30 | July 5, 2018 08:45 | 4h 15m | 1,702 | 7,233 |
| 3 | July 20, 2018 04:15 | July 20, 2018 07:45 | 3h 30m | 1,698 | 5,943 |
| 4 | April 25, 2018 15:45 | April 25, 2018 19:45 | 4h | 1,690 | 5,494 |
| 5 | June 16, 2018 13:45 | June 17, 2018 03:15 | 13h 30m | 1,562 | 2,999 |
| 6 | June 9, 2018 16:45 | June 10, 2018 14:30 | 21h 45m | 1,353 | 1,219 |
| 7 | July 16, 2018 13:30 | July 16, 2018 13:45 | 15m | 1,135 | 284 |
| 8 | August 2, 2018 20:00 | August 15, 2018 01:30 | 12d 5h | 1,134 | 90K |
| 9 | January 16, 2018 15:15 | January 16, 2018 15:30 | 15m | 1,038 | 260 |
| 10 | June 23, 2018 10:15 | June 23, 2018 20:00 | 9h 45m | 979 | 5,195 |
Outage episodes by size in 2018: 96 reached 100+ customers, 9 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 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 |
|---|---|---|---|---|---|
| Indiana Michigan Power Co | 2018 | 7.3 hrs | 1.53 | 4.1 hrs | 1.30 |
| 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 91% of Michigan's customers in 2018; 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, 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/michigan/cass-county