County annual report · FIPS 46123
2021 Tripp County, SD Power Outage Report
In 2021, customers in Tripp County, SD went without power for an average of 0.0 hours, a total of 79 customer-hours (South Dakota average 3.4 hours). That ranks 61st worst of 61 South Dakota counties and 2952nd of 2,974 nationally.
Compared with SD, the US and 2020
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Tripp County, 2021
The 7 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 14, 2021 03:00 | January 14, 2021 05:30 | 2h 30m | 2 | 5 |
| 2 | February 16, 2021 13:15 | February 16, 2021 13:30 | 15m | 2 | 1 |
| 3 | March 15, 2021 07:15 | March 15, 2021 17:30 | 10h 15m | 2 | 20 |
| 4 | March 16, 2021 00:45 | March 17, 2021 12:30 | 1d 11h | 2 | 51 |
| 5 | March 31, 2021 20:30 | March 31, 2021 21:00 | 30m | 2 | 1 |
| 6 | July 21, 2021 16:00 | July 21, 2021 16:15 | 15m | 2 | 1 |
| 7 | June 23, 2021 22:15 | June 23, 2021 23:45 | 1h 30m | 1 | 2 |
Outage episodes by size in 2021: 0 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 2021, 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Rosebud Electric Coop Inc | - | - | - | - | - |
| 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 79% of South Dakota's customers in 2021; 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, 2021, 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/). https://massoutage.com/reports/2021/south-dakota/tripp-county