County annual report · FIPS 19171
2015 Tama County, IA Power Outage Report
In 2015, customers in Tama County, IA went without power for an average of 1.9 hours, a total of 15K customer-hours (Iowa average 1.1 hours). That ranks 26th worst of 99 Iowa counties and 1301st 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 Tama 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 | July 24, 2015 16:15 | July 25, 2015 01:45 | 9h 30m | 1,471 | 3,527 |
| 2 | October 29, 2015 03:30 | October 29, 2015 04:30 | 1h | 1,316 | 987 |
| 3 | November 16, 2015 13:45 | November 16, 2015 15:15 | 1h 30m | 1,224 | 638 |
| 4 | April 15, 2015 07:15 | April 15, 2015 11:30 | 4h 15m | 516 | 2,061 |
| 5 | May 13, 2015 07:15 | May 13, 2015 09:00 | 1h 45m | 515 | 901 |
| 6 | March 31, 2015 07:45 | March 31, 2015 10:15 | 2h 30m | 419 | 960 |
| 7 | March 19, 2015 06:30 | March 19, 2015 08:15 | 1h 45m | 188 | 329 |
| 8 | November 12, 2015 08:00 | November 12, 2015 14:45 | 6h 45m | 188 | 692 |
| 9 | March 17, 2015 13:00 | March 17, 2015 17:45 | 4h 45m | 163 | 774 |
| 10 | April 16, 2015 13:15 | April 16, 2015 16:15 | 3h | 163 | 489 |
Outage episodes by size in 2015: 16 reached 100+ customers, 3 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 Tama 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 |
|---|---|---|---|---|---|
| T I P Rural Electric Coop | 2015 | 2.1 hrs | 1.93 | 2.1 hrs | 1.93 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| East-Central Iowa Rural Elec Coop | - | - | - | - | - |
| Grundy County Rural Elec Coop | - | - | - | - | - |
| Consumers Energy Coop - (IA) | - | - | - | - | - |
| City of Traer - (IA) | - | - | - | - | - |
| City of Dysart - (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 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,169 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. Tama County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Tama 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/tama-county