County annual report · FIPS 46123
2025 Tripp County, SD Power Outage Report
In 2025, customers in Tripp County, SD went without power for an average of 1.1 hours, a total of 5,426 customer-hours (South Dakota average 6.5 hours). That ranks 53rd worst of 65 South Dakota counties and 2720th 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 Tripp 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 | November 25, 2025 15:00 | November 25, 2025 17:30 | 2h 30m | 393 | 496 |
| 2 | April 29, 2025 02:30 | April 29, 2025 08:45 | 6h 15m | 287 | 1,794 |
| 3 | May 6, 2025 16:30 | May 6, 2025 17:30 | 1h | 202 | 109 |
| 4 | May 8, 2025 15:30 | May 8, 2025 17:00 | 1h 30m | 187 | 278 |
| 5 | June 18, 2025 18:45 | June 18, 2025 19:15 | 30m | 153 | 77 |
| 6 | September 10, 2025 21:45 | September 10, 2025 23:30 | 1h 45m | 116 | 203 |
| 7 | April 25, 2025 15:45 | April 25, 2025 18:00 | 2h 15m | 90 | 184 |
| 8 | August 16, 2025 11:45 | August 16, 2025 18:15 | 6h 30m | 78 | 201 |
| 9 | March 13, 2025 21:15 | March 14, 2025 00:15 | 3h | 62 | 186 |
| 10 | March 28, 2025 14:30 | March 28, 2025 15:30 | 1h | 46 | 35 |
Outage episodes by size in 2025: 6 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 Tripp 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 |
|---|---|---|---|---|---|
| Rosebud Electric Coop Inc | 2024 | 1.9 hrs | 0.84 | 1.6 hrs | 0.76 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Winner Municipal Utility | - | - | - | - | - |
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 ÷ 4,744 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. Tripp County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Tripp 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/tripp-county