County annual report · FIPS 19171
2017 Tama County, IA Power Outage Report
In 2017, customers in Tama County, IA went without power for an average of 1.9 hours, a total of 16K customer-hours (Iowa average 2.0 hours). That ranks 44th worst of 99 Iowa counties and 1672nd 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 Tama 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 21, 2017 09:45 | March 21, 2017 10:30 | 45m | 2,398 | 1,262 |
| 2 | November 6, 2017 15:15 | November 6, 2017 18:15 | 3h | 1,231 | 311 |
| 3 | November 1, 2017 04:45 | November 1, 2017 06:30 | 1h 45m | 1,230 | 2,153 |
| 4 | January 7, 2017 06:15 | January 7, 2017 17:00 | 10h 45m | 1,059 | 1,744 |
| 5 | July 12, 2017 23:15 | July 14, 2017 12:15 | 1d 13h | 928 | 2,221 |
| 6 | April 3, 2017 13:45 | April 3, 2017 14:45 | 1h | 527 | 425 |
| 7 | May 20, 2017 11:45 | May 20, 2017 15:15 | 3h 30m | 520 | 664 |
| 8 | August 10, 2017 18:00 | August 10, 2017 22:30 | 4h 30m | 350 | 540 |
| 9 | May 14, 2017 05:15 | May 14, 2017 07:00 | 1h 45m | 246 | 191 |
| 10 | March 7, 2017 00:30 | March 7, 2017 12:45 | 12h 15m | 242 | 601 |
Outage episodes by size in 2017: 15 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 Tama 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 |
|---|---|---|---|---|---|
| T I P Rural Electric Coop | 2017 | 2.8 hrs | 2.31 | 2.8 hrs | 2.31 |
| 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 2017; 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, 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/tama-county