County annual report · FIPS 46047
2024 Fall River County, SD Power Outage Report
In 2024, customers in Fall River County, SD went without power for an average of 3.4 hours, a total of 14K customer-hours (South Dakota average 2.3 hours). That ranks 19th worst of 65 South Dakota counties and 1989th 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 Fall River 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 | September 11, 2024 12:45 | September 12, 2024 14:45 | 1d 2h | 1,669 | 443 |
| 2 | August 19, 2024 05:00 | August 19, 2024 06:30 | 1h 30m | 1,667 | 2,501 |
| 3 | October 2, 2024 21:45 | October 3, 2024 03:15 | 5h 30m | 548 | 2,581 |
| 4 | March 12, 2024 16:15 | March 12, 2024 18:45 | 2h 30m | 521 | 1,303 |
| 5 | January 13, 2024 13:00 | January 13, 2024 18:00 | 5h | 518 | 1,703 |
| 6 | July 24, 2024 12:45 | July 27, 2024 18:00 | 3d 5h | 457 | 329 |
| 7 | May 17, 2024 23:30 | May 20, 2024 19:45 | 2d 20h | 380 | 881 |
| 8 | December 11, 2024 16:30 | December 11, 2024 17:30 | 1h | 302 | 302 |
| 9 | December 18, 2024 18:00 | December 18, 2024 18:15 | 15m | 302 | 76 |
| 10 | July 30, 2024 23:30 | July 31, 2024 00:00 | 30m | 228 | 114 |
Outage episodes by size in 2024: 12 reached 100+ customers, 2 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 Fall River 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 | - | - | - | - | - |
| Niobrara Electric Assn, Inc | - | - | - | - | - |
| 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 ÷ 4,055 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. Fall River County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Fall River 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/fall-river-county