County annual report · FIPS 19061
2018 Dubuque County, IA Power Outage Report
In 2018, customers in Dubuque County, IA went without power for an average of 0.8 hours, a total of 38K customer-hours (Iowa average 2.2 hours). That ranks 88th worst of 99 Iowa counties and 2377th 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 Dubuque 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 | August 26, 2018 17:00 | August 26, 2018 18:30 | 1h 30m | 4,302 | 5,377 |
| 2 | June 21, 2018 20:15 | June 22, 2018 01:30 | 5h 15m | 2,597 | 2,844 |
| 3 | July 3, 2018 14:15 | July 3, 2018 17:00 | 2h 45m | 1,991 | 1,976 |
| 4 | April 12, 2018 03:45 | April 12, 2018 10:30 | 6h 45m | 1,662 | 2,858 |
| 5 | May 20, 2018 04:30 | May 20, 2018 05:30 | 1h | 1,515 | 1,515 |
| 6 | March 3, 2018 08:30 | March 3, 2018 11:15 | 2h 45m | 1,345 | 2,406 |
| 7 | September 12, 2018 15:00 | September 14, 2018 16:00 | 2d 1h | 1,283 | 1,675 |
| 8 | July 6, 2018 00:00 | July 6, 2018 03:15 | 3h 15m | 1,255 | 1,359 |
| 9 | January 30, 2018 15:15 | January 30, 2018 16:15 | 1h | 1,174 | 588 |
| 10 | January 16, 2018 20:00 | January 16, 2018 21:15 | 1h 15m | 1,167 | 1,167 |
Outage episodes by size in 2018: 43 reached 100+ customers, 10 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 Dubuque 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 |
|---|---|---|---|---|---|
| Maquoketa Valley Rrl Elec Coop | 2018 | 52 min | 0.96 | 50 min | 0.93 |
| Allamakee-Clayton El Coop, Inc | 2018 | 1.5 hrs | 0.73 | 1.5 hrs | 0.73 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Cascade Municipal Utilities | - | - | - | - | - |
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 ÷ 46,546 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. Dubuque County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dubuque 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2018/iowa/dubuque-county