County annual report · FIPS 46033
2022 Custer County, SD Power Outage Report
In 2022, customers in Custer County, SD went without power for an average of 3.4 hours, a total of 15K customer-hours (South Dakota average 6.9 hours). That ranks 38th worst of 63 South Dakota counties and 1841st of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Custer County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 7, 2022 12:30 | April 8, 2022 05:45 | 17h 15m | 861 | 7,251 |
| 2 | September 16, 2022 14:00 | September 16, 2022 15:45 | 1h 45m | 836 | 451 |
| 3 | July 25, 2022 02:30 | July 25, 2022 04:00 | 1h 30m | 458 | 594 |
| 4 | April 11, 2022 19:15 | April 12, 2022 12:30 | 17h 15m | 203 | 3,220 |
| 5 | September 29, 2022 18:45 | September 29, 2022 23:15 | 4h 30m | 181 | 131 |
| 6 | June 14, 2022 22:15 | June 15, 2022 04:00 | 5h 45m | 175 | 73 |
| 7 | June 6, 2022 07:00 | June 6, 2022 09:15 | 2h 15m | 103 | 153 |
| 8 | May 6, 2022 16:30 | May 6, 2022 17:15 | 45m | 89 | 67 |
| 9 | May 21, 2022 10:00 | May 21, 2022 15:00 | 5h | 83 | 397 |
| 10 | May 21, 2022 18:00 | May 21, 2022 19:30 | 1h 30m | 72 | 108 |
Outage episodes by size in 2022: 7 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 2022, 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. | 2022 | 1.8 hrs | 0.88 | 1.6 hrs | 0.85 |
| Black Hills Electric Coop, Inc | 2022 | 2.2 hrs | 0.70 | 80 min | 0.61 |
| 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 89% of South Dakota's customers in 2022; 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, 2022, 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/2022/south-dakota/custer-county