County annual report · FIPS 26057
2015 Gratiot County, MI Power Outage Report
In 2015, customers in Gratiot County, MI went without power for an average of 7.5 hours, a total of 158K customer-hours (Michigan average 6.8 hours). That ranks 36th worst of 80 Michigan counties and 359th 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 Gratiot 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 | October 19, 2015 16:15 | October 20, 2015 00:00 | 7h 45m | 5,344 | 13K |
| 2 | June 23, 2015 01:00 | June 23, 2015 16:30 | 15h 30m | 4,834 | 12K |
| 3 | September 4, 2015 18:15 | September 4, 2015 21:45 | 3h 30m | 4,826 | 9,739 |
| 4 | December 14, 2015 18:45 | December 15, 2015 05:15 | 10h 30m | 3,413 | 6,216 |
| 5 | December 24, 2015 05:45 | December 26, 2015 22:15 | 2d 16h | 2,655 | 72K |
| 6 | November 8, 2015 07:15 | November 8, 2015 09:45 | 2h 30m | 2,602 | 6,505 |
| 7 | September 2, 2015 06:15 | September 2, 2015 08:00 | 1h 45m | 2,601 | 4,552 |
| 8 | June 29, 2015 17:45 | June 29, 2015 21:00 | 3h 15m | 1,717 | 872 |
| 9 | April 2, 2015 21:30 | April 3, 2015 00:00 | 2h 30m | 1,712 | 2,997 |
| 10 | November 8, 2015 10:45 | November 8, 2015 14:45 | 4h | 806 | 2,218 |
Outage episodes by size in 2015: 31 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 Gratiot 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 |
| City of St Louis - (MI) | - | - | - | - | - |
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 ÷ 21,004 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. Gratiot County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Gratiot 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/gratiot-county