County annual report · FIPS 19013
2018 Black Hawk County, IA Power Outage Report
In 2018, customers in Black Hawk County, IA went without power for an average of 0.9 hours, a total of 53K customer-hours (Iowa average 2.2 hours). That ranks 86th worst of 99 Iowa counties and 2338th 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 Black Hawk 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 | May 31, 2018 15:30 | June 1, 2018 01:15 | 9h 45m | 17,227 | 5,935 |
| 2 | July 26, 2018 01:45 | July 26, 2018 05:30 | 3h 45m | 4,815 | 3,272 |
| 3 | July 16, 2018 14:15 | July 16, 2018 15:30 | 1h 15m | 4,597 | 1,178 |
| 4 | June 5, 2018 17:45 | June 5, 2018 18:45 | 1h | 3,476 | 1,134 |
| 5 | September 1, 2018 07:00 | September 1, 2018 08:30 | 1h 30m | 2,518 | 2,306 |
| 6 | November 4, 2018 18:30 | November 5, 2018 01:30 | 7h | 1,958 | 2,222 |
| 7 | March 5, 2018 09:00 | March 6, 2018 01:00 | 16h | 1,255 | 2,649 |
| 8 | May 4, 2018 08:00 | May 4, 2018 13:15 | 5h 15m | 1,196 | 831 |
| 9 | May 1, 2018 13:00 | May 1, 2018 17:45 | 4h 45m | 1,057 | 1,192 |
| 10 | October 3, 2018 20:00 | October 4, 2018 07:15 | 11h 15m | 1,050 | 1,747 |
Outage episodes by size in 2018: 50 reached 100+ customers, 10 reached 1,000+ customers, 1 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 Black Hawk 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2018 | 1.9 hrs | 1.18 | 75 min | 0.96 |
| Interstate Power and Light Co | - | - | - | - | - |
| East-Central Iowa Rural Elec Coop | - | - | - | - | - |
| Grundy County Rural Elec Coop | - | - | - | - | - |
| Cedar Falls Utilities | - | - | - | - | - |
| La Porte City 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 ÷ 57,533 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. Black Hawk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Black Hawk 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/black-hawk-county