County annual report · FIPS 26155
2018 Shiawassee County, MI Power Outage Report
In 2018, customers in Shiawassee County, MI went without power for an average of 3.9 hours, a total of 161K customer-hours (Michigan average 10.0 hours). That ranks 53rd worst of 80 Michigan counties and 1278th 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 Shiawassee 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 | October 20, 2018 11:00 | October 23, 2018 00:00 | 2d 13h | 6,421 | 32K |
| 2 | February 20, 2018 00:00 | February 20, 2018 11:15 | 11h 15m | 3,956 | 17K |
| 3 | May 27, 2018 02:15 | May 28, 2018 07:30 | 1d 5h | 3,620 | 7,205 |
| 4 | September 30, 2018 09:15 | September 30, 2018 16:00 | 6h 45m | 2,073 | 1,528 |
| 5 | April 15, 2018 07:00 | April 16, 2018 15:15 | 1d 8h | 1,781 | 9,733 |
| 6 | May 4, 2018 13:30 | May 9, 2018 02:30 | 4d 13h | 1,449 | 22K |
| 7 | April 7, 2018 14:00 | April 7, 2018 17:30 | 3h 30m | 951 | 1,011 |
| 8 | January 12, 2018 00:00 | January 13, 2018 01:00 | 1d 1h | 883 | 2,222 |
| 9 | May 11, 2018 07:15 | May 13, 2018 12:15 | 2d 5h | 763 | 31K |
| 10 | May 14, 2018 12:15 | May 14, 2018 20:30 | 8h 15m | 747 | 252 |
Outage episodes by size in 2018: 48 reached 100+ customers, 6 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 Shiawassee 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 |
|---|---|---|---|---|---|
| Consumers Energy Co - (MI) | 2018 | 6.8 hrs | 1.29 | 3.3 hrs | 1.02 |
| DTE Electric Company | 2018 | 8.1 hrs | 1.36 | 3.0 hrs | 1.04 |
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 ÷ 41,361 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. Shiawassee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shiawassee 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/shiawassee-county