County annual report · FIPS 46033
2024 Custer County, SD Power Outage Report
In 2024, customers in Custer County, SD went without power for an average of 2.2 hours, a total of 9,972 customer-hours (South Dakota average 2.3 hours). That ranks 27th worst of 65 South Dakota counties and 2346th 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 Custer 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 | January 13, 2024 13:15 | January 13, 2024 15:45 | 2h 30m | 714 | 563 |
| 2 | May 7, 2024 07:30 | May 7, 2024 23:45 | 16h 15m | 675 | 4,456 |
| 3 | January 13, 2024 18:00 | January 13, 2024 22:00 | 4h | 176 | 287 |
| 4 | September 2, 2024 04:45 | September 2, 2024 13:15 | 8h 30m | 159 | 866 |
| 5 | September 30, 2024 20:30 | September 30, 2024 23:45 | 3h 15m | 107 | 348 |
| 6 | July 21, 2024 20:15 | July 21, 2024 22:15 | 2h | 86 | 160 |
| 7 | April 25, 2024 21:15 | April 29, 2024 14:45 | 3d 17h | 81 | 171 |
| 8 | September 10, 2024 19:30 | September 10, 2024 20:30 | 1h | 78 | 78 |
| 9 | February 29, 2024 07:00 | February 29, 2024 10:00 | 3h | 77 | 231 |
| 10 | October 24, 2024 15:15 | October 24, 2024 17:15 | 2h | 64 | 128 |
Outage episodes by size in 2024: 5 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 Custer 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 ÷ 4,481 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. Custer County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Custer 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/custer-county