County annual report · FIPS 19049
2015 Dallas County, IA Power Outage Report
In 2015, customers in Dallas County, IA went without power for an average of 0.6 hours, a total of 37K customer-hours (Iowa average 1.1 hours). That ranks 68th worst of 99 Iowa counties and 1988th of 2,484 nationally.
Compared with IA, the US
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Dallas 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 | August 17, 2015 13:15 | August 17, 2015 23:30 | 10h 15m | 7,066 | 11K |
| 2 | May 28, 2015 03:45 | May 28, 2015 04:00 | 15m | 4,886 | 1,222 |
| 3 | September 25, 2015 13:30 | September 25, 2015 14:45 | 1h 15m | 1,382 | 1,037 |
| 4 | January 2, 2015 04:30 | January 2, 2015 05:30 | 1h | 1,252 | 940 |
| 5 | July 18, 2015 14:45 | July 18, 2015 18:00 | 3h 15m | 952 | 1,446 |
| 6 | July 4, 2015 15:45 | July 4, 2015 17:00 | 1h 15m | 923 | 857 |
| 7 | September 7, 2015 05:45 | September 7, 2015 09:15 | 3h 30m | 565 | 428 |
| 8 | September 8, 2015 00:45 | September 8, 2015 04:30 | 3h 45m | 565 | 1,271 |
| 9 | September 15, 2015 05:30 | September 15, 2015 11:15 | 5h 45m | 564 | 1,976 |
| 10 | September 15, 2015 20:00 | September 15, 2015 20:45 | 45m | 497 | 373 |
Outage episodes by size in 2015: 29 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 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2015 | 2.2 hrs | 1.05 | 87 min | 0.88 |
| 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 2015; 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, 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/iowa/dallas-county