County annual report · FIPS 19049
2017 Dallas County, IA Power Outage Report
In 2017, customers in Dallas County, IA went without power for an average of 0.7 hours, a total of 42K customer-hours (Iowa average 2.0 hours). That ranks 87th worst of 99 Iowa counties and 2180th 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 Dallas 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 | August 15, 2017 18:30 | August 15, 2017 20:15 | 1h 45m | 4,568 | 1,145 |
| 2 | May 17, 2017 21:15 | May 19, 2017 19:30 | 1d 22h | 4,436 | 15K |
| 3 | September 28, 2017 18:30 | September 29, 2017 00:30 | 6h | 1,530 | 2,306 |
| 4 | July 21, 2017 02:30 | July 21, 2017 05:45 | 3h 15m | 1,252 | 1,878 |
| 5 | June 14, 2017 14:15 | June 14, 2017 23:00 | 8h 45m | 963 | 1,732 |
| 6 | December 7, 2017 10:00 | December 7, 2017 12:45 | 2h 45m | 847 | 846 |
| 7 | July 11, 2017 09:00 | July 11, 2017 13:30 | 4h 30m | 702 | 724 |
| 8 | July 13, 2017 17:30 | July 13, 2017 19:30 | 2h | 687 | 1,010 |
| 9 | May 5, 2017 01:15 | May 5, 2017 02:45 | 1h 30m | 655 | 983 |
| 10 | October 7, 2017 05:15 | October 7, 2017 08:15 | 3h | 520 | 725 |
Outage episodes by size in 2017: 36 reached 100+ customers, 4 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 Dallas 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 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Guthrie County Rural E C 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 n/a of Iowa's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 58,451 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. Dallas County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dallas 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/dallas-county