County annual report · FIPS 46103
2024 Pennington County, SD Power Outage Report
In 2024, customers in Pennington County, SD went without power for an average of 1.3 hours, a total of 88K customer-hours (South Dakota average 2.3 hours). That ranks 40th worst of 65 South Dakota counties and 2630th of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Pennington County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 21, 2024 20:30 | November 22, 2024 00:15 | 3h 45m | 4,330 | 1,863 |
| 2 | April 7, 2024 00:45 | April 7, 2024 04:45 | 4h | 1,760 | 2,910 |
| 3 | April 29, 2024 22:00 | April 29, 2024 22:30 | 30m | 1,698 | 849 |
| 4 | September 12, 2024 23:45 | September 30, 2024 13:15 | 17d 13h | 1,249 | 4,164 |
| 5 | December 19, 2024 17:00 | December 19, 2024 18:45 | 1h 45m | 853 | 1,493 |
| 6 | April 29, 2024 09:00 | April 29, 2024 12:15 | 3h 15m | 769 | 2,499 |
| 7 | July 10, 2024 01:15 | July 10, 2024 02:15 | 1h | 706 | 706 |
| 8 | May 7, 2024 09:30 | May 13, 2024 14:00 | 6d 4h | 702 | 5,435 |
| 9 | November 4, 2024 21:15 | November 4, 2024 22:30 | 1h 15m | 673 | 841 |
| 10 | December 21, 2024 18:45 | December 23, 2024 22:45 | 2d 4h | 673 | 1,656 |
Outage episodes by size in 2024: 46 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 Pennington County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2024 | 40 min | 0.70 | 40 min | 0.70 |
| Black Hills Electric Coop, Inc | 2024 | 3.8 hrs | 1.03 | 1.7 hrs | 0.77 |
| West River Electric Assn Inc | 2024 | 44 min | 0.53 | 44 min | 0.53 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Black Hills Energy | - | - | - | - | - |
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 South Dakota's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 68,130 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. Pennington County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pennington County, SD annual power outage report, 2024, 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/2024/south-dakota/pennington-county