County annual report · FIPS 19161
2017 Sac County, IA Power Outage Report
In 2017, customers in Sac County, IA went without power for an average of 1.8 hours, a total of 6,936 customer-hours (Iowa average 2.0 hours). That ranks 49th worst of 99 Iowa counties and 1712th of 2,786 nationally.
Compared with IA, the US and 2016
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Sac County, 2017
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 23, 2017 13:45 | March 23, 2017 14:45 | 1h | 788 | 395 |
| 2 | May 17, 2017 01:30 | May 17, 2017 17:30 | 16h | 573 | 4,208 |
| 3 | November 29, 2017 16:30 | November 29, 2017 17:00 | 30m | 549 | 139 |
| 4 | August 24, 2017 04:30 | August 24, 2017 05:00 | 30m | 487 | 244 |
| 5 | August 3, 2017 08:30 | August 3, 2017 13:15 | 4h 45m | 407 | 432 |
| 6 | May 10, 2017 02:45 | May 10, 2017 03:00 | 15m | 405 | 101 |
| 7 | April 19, 2017 16:30 | April 19, 2017 16:45 | 15m | 158 | 40 |
| 8 | October 31, 2017 09:45 | October 31, 2017 11:00 | 1h 15m | 157 | 196 |
| 9 | April 30, 2017 10:45 | April 30, 2017 17:15 | 6h 30m | 66 | 223 |
| 10 | December 13, 2017 15:45 | December 13, 2017 21:45 | 6h | 66 | 163 |
Outage episodes by size in 2017: 8 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 Sac County reported on EIA Form 861 for 2017, 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2017 | 1.9 hrs | 1.00 | 1.6 hrs | 0.91 |
| Iowa Lakes Electric Coop | 2017 | 48 min | 0.56 | 48 min | 0.56 |
| Western Iowa Power Coop | 2017 | 37 min | 0.60 | 37 min | 0.60 |
| North West Rural Electric Coop | - | - | - | - | - |
| Raccoon Valley Electric Cooperative | - | - | - | - | - |
| Calhoun County Elec Coop Assn | - | - | - | - | - |
| City of Auburn - (IA) | - | - | - | - | - |
| City of Lake View - (IA) | - | - | - | - | - |
| City of Wall Lake - (IA) | - | - | - | - | - |
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 Iowa's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,895 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. Sac County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sac County, IA annual power outage report, 2017, 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/2017/iowa/sac-county