County annual report · FIPS 26073
2015 Isabella County, MI Power Outage Report
In 2015, customers in Isabella County, MI went without power for an average of 3.1 hours, a total of 113K customer-hours (Michigan average 6.8 hours). That ranks 56th worst of 80 Michigan counties and 883rd 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 Isabella 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 | April 9, 2015 15:00 | April 10, 2015 01:45 | 10h 45m | 3,639 | 17K |
| 2 | June 29, 2015 18:00 | June 30, 2015 02:15 | 8h 15m | 1,877 | 4,260 |
| 3 | April 10, 2015 08:45 | April 10, 2015 22:30 | 13h 45m | 1,856 | 8,576 |
| 4 | January 4, 2015 08:45 | January 4, 2015 10:30 | 1h 45m | 1,439 | 2,518 |
| 5 | December 24, 2015 07:00 | December 27, 2015 18:45 | 3d 11h | 1,195 | 51K |
| 6 | December 9, 2015 14:00 | December 9, 2015 15:45 | 1h 45m | 889 | 1,329 |
| 7 | July 28, 2015 08:15 | July 28, 2015 17:00 | 8h 45m | 866 | 1,438 |
| 8 | March 21, 2015 23:15 | March 22, 2015 19:45 | 20h 30m | 712 | 10K |
| 9 | October 14, 2015 09:00 | October 14, 2015 09:15 | 15m | 543 | 136 |
| 10 | April 1, 2015 15:00 | April 1, 2015 15:15 | 15m | 494 | 124 |
Outage episodes by size in 2015: 31 reached 100+ customers, 5 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 Isabella 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 |
|---|---|---|---|---|---|
| Consumers Energy Co - (MI) | 2015 | 7.3 hrs | 1.18 | 3.0 hrs | 0.98 |
| DTE Electric Company | 2015 | 4.6 hrs | 1.00 | 3.1 hrs | 0.91 |
| Tri-County Electric Coop (MI) | 2015 | 4.7 hrs | 1.68 | 3.0 hrs | 1.49 |
| Wolverine Power Supply 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 Michigan's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 36,507 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. Isabella County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Isabella 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/isabella-county