County annual report · FIPS 26131
2018 Ontonagon County, MI Power Outage Report
In 2018, customers in Ontonagon County, MI went without power for an average of 1.3 hours, a total of 5,315 customer-hours (Michigan average 10.0 hours). That ranks 73rd worst of 80 Michigan counties and 2208th 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 Ontonagon 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 | June 15, 2018 15:45 | June 16, 2018 00:00 | 8h 15m | 631 | 212 |
| 2 | July 10, 2018 20:30 | July 10, 2018 22:00 | 1h 30m | 444 | 336 |
| 3 | May 14, 2018 02:30 | May 14, 2018 04:00 | 1h 30m | 437 | 481 |
| 4 | September 2, 2018 22:30 | September 2, 2018 23:30 | 1h | 236 | 236 |
| 5 | May 25, 2018 23:15 | May 26, 2018 03:45 | 4h 30m | 225 | 841 |
| 6 | February 10, 2018 08:15 | February 10, 2018 14:00 | 5h 45m | 157 | 638 |
| 7 | August 22, 2018 20:30 | August 22, 2018 23:15 | 2h 45m | 151 | 265 |
| 8 | September 1, 2018 09:45 | September 1, 2018 10:45 | 1h | 151 | 39 |
| 9 | June 1, 2018 22:45 | June 1, 2018 23:45 | 1h | 148 | 72 |
| 10 | November 10, 2018 00:00 | November 10, 2018 01:30 | 1h 30m | 124 | 185 |
Outage episodes by size in 2018: 10 reached 100+ customers, 0 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 Ontonagon 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2018 | 2.9 hrs | 0.94 | 1.8 hrs | 0.69 |
| Upper Peninsula Power Company | 2018 | 2.3 hrs | 1.16 | 2.3 hrs | 1.16 |
| Upper Michigan Energy Resources Corp. | 2018 | 4.1 hrs | 1.16 | 2.4 hrs | 0.91 |
| Ontonagon County R E A | - | - | - | - | - |
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 ÷ 4,246 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. Ontonagon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ontonagon 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/ontonagon-county