County annual report · FIPS 26027
2023 Cass County, MI Power Outage Report
In 2023, customers in Cass County, MI went without power for an average of 44.5 hours, a total of 152K customer-hours (Michigan average 26.5 hours). That ranks 7th worst of 83 Michigan counties and 129th of 2,977 nationally.
Compared with MI, the US and 2022
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Cass County, 2023
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 26, 2023 16:15 | July 27, 2023 20:30 | 1d 4h | 4,119 | 31K |
| 2 | March 3, 2023 20:30 | March 5, 2023 05:15 | 1d 8h | 2,056 | 22K |
| 3 | May 13, 2023 08:15 | May 13, 2023 15:00 | 6h 45m | 1,681 | 5,428 |
| 4 | June 25, 2023 05:30 | June 27, 2023 11:30 | 2d 6h | 1,533 | 12K |
| 5 | June 2, 2023 10:00 | June 3, 2023 07:00 | 21h | 1,529 | 4,755 |
| 6 | June 5, 2023 12:30 | June 5, 2023 18:15 | 5h 45m | 1,272 | 3,073 |
| 7 | November 1, 2023 15:45 | November 1, 2023 16:45 | 1h | 1,269 | 318 |
| 8 | July 28, 2023 21:30 | July 29, 2023 22:15 | 1d | 1,261 | 8,115 |
| 9 | May 16, 2023 01:30 | May 16, 2023 02:45 | 1h 15m | 1,093 | 919 |
| 10 | July 5, 2023 22:45 | July 6, 2023 18:30 | 19h 45m | 1,023 | 2,922 |
Outage episodes by size in 2023: 71 reached 100+ customers, 10 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 2023, 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 | 2023 | 3.7 hrs | 1.10 | 2.6 hrs | 0.97 |
| Midwest Energy Cooperative - (MI) | 2023 | 10.2 hrs | 1.50 | 3.3 hrs | 1.15 |
| 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 2023; 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, 2023, 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/2023/michigan/cass-county