County annual report · FIPS 19039
2018 Clarke County, IA Power Outage Report
In 2018, customers in Clarke County, IA went without power for an average of 1.9 hours, a total of 8,181 customer-hours (Iowa average 2.2 hours). That ranks 58th worst of 99 Iowa counties and 1905th of 2,798 nationally.
Compared with IA, the US and 2017
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Clarke County, 2018
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, 2018 16:30 | June 29, 2018 03:30 | 11h | 1,254 | 2,895 |
| 2 | August 31, 2018 12:15 | August 31, 2018 13:45 | 1h 30m | 296 | 157 |
| 3 | April 6, 2018 20:15 | April 6, 2018 20:30 | 15m | 138 | 35 |
| 4 | June 11, 2018 05:00 | June 11, 2018 15:15 | 10h 15m | 94 | 526 |
| 5 | May 4, 2018 09:00 | May 4, 2018 13:15 | 4h 15m | 78 | 169 |
| 6 | August 20, 2018 05:15 | August 20, 2018 09:15 | 4h | 77 | 168 |
| 7 | September 4, 2018 09:15 | September 4, 2018 14:15 | 5h | 76 | 142 |
| 8 | July 9, 2018 12:00 | July 9, 2018 14:15 | 2h 15m | 68 | 54 |
| 9 | June 24, 2018 23:15 | June 25, 2018 01:00 | 1h 45m | 66 | 114 |
| 10 | April 23, 2018 20:15 | April 23, 2018 21:45 | 1h 30m | 62 | 75 |
Outage episodes by size in 2018: 3 reached 100+ customers, 1 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 2018, 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 89% of Iowa's customers in 2018; 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, 2018, 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/2018/iowa/clarke-county