County annual report · FIPS 26105
2015 Mason County, MI Power Outage Report
In 2015, customers in Mason County, MI went without power for an average of 2.7 hours, a total of 52K customer-hours (Michigan average 6.8 hours). That ranks 64th worst of 80 Michigan counties and 992nd 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 Mason 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 24, 2015 05:30 | December 27, 2015 23:15 | 3d 17h | 1,033 | 19K |
| 2 | July 13, 2015 19:45 | July 14, 2015 16:00 | 20h 15m | 790 | 2,706 |
| 3 | September 19, 2015 04:45 | September 19, 2015 19:30 | 14h 45m | 638 | 832 |
| 4 | December 28, 2015 20:15 | December 29, 2015 12:30 | 16h 15m | 620 | 1,992 |
| 5 | July 18, 2015 12:45 | July 19, 2015 01:45 | 13h | 541 | 1,774 |
| 6 | March 26, 2015 09:45 | March 26, 2015 12:15 | 2h 30m | 506 | 885 |
| 7 | September 7, 2015 10:45 | September 7, 2015 12:45 | 2h | 504 | 755 |
| 8 | April 2, 2015 17:15 | April 2, 2015 19:00 | 1h 45m | 503 | 505 |
| 9 | April 20, 2015 17:15 | April 20, 2015 19:15 | 2h | 472 | 772 |
| 10 | June 20, 2015 15:30 | June 20, 2015 16:30 | 1h | 455 | 455 |
Outage episodes by size in 2015: 36 reached 100+ customers, 1 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 Mason 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 |
| Great Lakes Energy Coop | 2015 | 15.2 hrs | 2.27 | 2.9 hrs | 1.35 |
| 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 ÷ 18,909 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. Mason County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mason 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/mason-county