County annual report · FIPS 46117
2025 Stanley County, SD Power Outage Report
In 2025, customers in Stanley County, SD went without power for an average of 2.8 hours, a total of 7,018 customer-hours (South Dakota average 6.5 hours). That ranks 29th worst of 65 South Dakota counties and 2139th 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 Stanley 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 | June 29, 2025 03:45 | June 29, 2025 12:45 | 9h | 516 | 2,713 |
| 2 | April 15, 2025 00:45 | April 15, 2025 03:15 | 2h 30m | 515 | 1,288 |
| 3 | February 24, 2025 19:30 | February 24, 2025 21:00 | 1h 30m | 223 | 266 |
| 4 | January 30, 2025 23:00 | January 31, 2025 00:45 | 1h 45m | 164 | 246 |
| 5 | January 31, 2025 15:15 | January 31, 2025 16:30 | 1h 15m | 163 | 204 |
| 6 | March 12, 2025 16:00 | March 12, 2025 17:45 | 1h 45m | 154 | 270 |
| 7 | May 19, 2025 07:00 | May 19, 2025 09:15 | 2h 15m | 154 | 253 |
| 8 | December 18, 2025 09:00 | December 18, 2025 13:00 | 4h | 153 | 191 |
| 9 | November 15, 2025 10:45 | November 15, 2025 13:45 | 3h | 136 | 239 |
| 10 | May 28, 2025 20:45 | May 28, 2025 22:45 | 2h | 73 | 38 |
Outage episodes by size in 2025: 9 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 Stanley 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 |
|---|---|---|---|---|---|
| West Central Electric Coop Inc - (SD) | 2018 | 3.7 hrs | 1.25 | 1.5 hrs | 1.25 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| City of Fort Pierre - (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 ÷ 2,520 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. Stanley County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Stanley 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/stanley-county