County annual report · FIPS 46115
2025 Spink County, SD Power Outage Report
In 2025, customers in Spink County, SD went without power for an average of 3.5 hours, a total of 12K customer-hours (South Dakota average 6.5 hours). That ranks 25th worst of 65 South Dakota counties and 1902nd of 3,000 nationally.
Compared with SD, the US and 2024
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Spink County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 10, 2025 04:45 | December 10, 2025 08:45 | 4h | 1,192 | 3,723 |
| 2 | April 14, 2025 21:00 | April 14, 2025 23:00 | 2h | 587 | 447 |
| 3 | June 11, 2025 14:30 | June 11, 2025 17:00 | 2h 30m | 578 | 1,445 |
| 4 | November 18, 2025 11:15 | November 18, 2025 14:00 | 2h 45m | 503 | 1,383 |
| 5 | July 24, 2025 15:15 | July 24, 2025 18:15 | 3h | 468 | 1,196 |
| 6 | April 1, 2025 09:45 | April 1, 2025 10:15 | 30m | 265 | 133 |
| 7 | June 22, 2025 10:30 | June 22, 2025 12:30 | 2h | 265 | 530 |
| 8 | July 22, 2025 13:15 | July 22, 2025 13:30 | 15m | 265 | 66 |
| 9 | May 1, 2025 02:15 | May 1, 2025 04:15 | 2h | 170 | 340 |
| 10 | May 16, 2025 05:00 | May 16, 2025 07:45 | 2h 45m | 170 | 468 |
Outage episodes by size in 2025: 14 reached 100+ customers, 1 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 Spink County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2024 | 76 min | 0.70 | 66 min | 0.65 |
| Northern Electric Coop, Inc | 2024 | 50 min | 0.67 | 50 min | 0.67 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Dakota Energy Coop Inc | - | - | - | - | - |
| Codington-Clark Elec Coop, Inc | - | - | - | - | - |
| Lake Region Electric Assn, Inc - (SD) | - | - | - | - | - |
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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,353 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. Spink County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Spink County, SD annual power outage report, 2025, 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/2025/south-dakota/spink-county