County annual report · FIPS 19039
2017 Clarke County, IA Power Outage Report
In 2017, customers in Clarke County, IA went without power for an average of 2.1 hours, a total of 8,863 customer-hours (Iowa average 2.0 hours). That ranks 38th worst of 99 Iowa counties and 1607th 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 Clarke 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 | June 28, 2017 21:15 | July 3, 2017 16:45 | 4d 19h | 889 | 6,458 |
| 2 | May 8, 2017 11:00 | May 8, 2017 15:30 | 4h 30m | 195 | 233 |
| 3 | August 30, 2017 19:15 | August 30, 2017 20:00 | 45m | 178 | 134 |
| 4 | July 4, 2017 20:45 | July 4, 2017 22:15 | 1h 30m | 78 | 79 |
| 5 | January 16, 2017 18:45 | January 16, 2017 19:45 | 1h | 69 | 69 |
| 6 | March 29, 2017 17:45 | March 29, 2017 19:45 | 2h | 66 | 63 |
| 7 | August 30, 2017 13:30 | August 30, 2017 18:30 | 5h | 66 | 225 |
| 8 | September 21, 2017 11:45 | September 21, 2017 13:00 | 1h 15m | 43 | 43 |
| 9 | August 23, 2017 23:15 | August 24, 2017 00:45 | 1h 30m | 40 | 51 |
| 10 | June 10, 2017 17:00 | June 10, 2017 18:30 | 1h 30m | 39 | 59 |
Outage episodes by size in 2017: 3 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 Clarke 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 |
|---|---|---|---|---|---|
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Clarke Electric Coop Inc - (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 ÷ 4,290 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. Clarke County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clarke 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/). https://massoutage.com/reports/2017/iowa/clarke-county