County annual report · FIPS 26155
2015 Shiawassee County, MI Power Outage Report
In 2015, customers in Shiawassee County, MI went without power for an average of 2.8 hours, a total of 116K customer-hours (Michigan average 6.8 hours). That ranks 61st worst of 80 Michigan counties and 963rd 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 Shiawassee 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 | March 16, 2015 13:15 | March 16, 2015 18:30 | 5h 15m | 11,085 | 28K |
| 2 | September 13, 2015 14:00 | September 13, 2015 19:30 | 5h 30m | 4,873 | 14K |
| 3 | July 18, 2015 15:00 | July 19, 2015 01:45 | 10h 45m | 1,646 | 11K |
| 4 | May 25, 2015 17:00 | May 26, 2015 00:15 | 7h 15m | 888 | 1,861 |
| 5 | July 19, 2015 03:00 | July 19, 2015 06:30 | 3h 30m | 827 | 473 |
| 6 | September 21, 2015 20:15 | September 21, 2015 20:30 | 15m | 824 | 206 |
| 7 | August 19, 2015 17:15 | August 19, 2015 21:30 | 4h 15m | 732 | 757 |
| 8 | June 22, 2015 17:30 | June 24, 2015 06:30 | 1d 13h | 730 | 8,494 |
| 9 | September 14, 2015 03:15 | September 14, 2015 16:30 | 13h 15m | 691 | 6,288 |
| 10 | September 16, 2015 18:30 | September 16, 2015 18:45 | 15m | 668 | 167 |
Outage episodes by size in 2015: 45 reached 100+ customers, 3 reached 1,000+ customers, 1 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 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 |
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 ÷ 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, 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/shiawassee-county