County annual report · FIPS 46115
2021 Spink County, SD Power Outage Report
In 2021, customers in Spink County, SD went without power for an average of 2.1 hours, a total of 6,918 customer-hours (South Dakota average 3.4 hours). That ranks 40th worst of 61 South Dakota counties and 2200th 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 Spink County, 2021
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 2, 2021 23:45 | September 3, 2021 02:00 | 2h 15m | 969 | 1,679 |
| 2 | August 26, 2021 14:00 | August 26, 2021 19:15 | 5h 15m | 806 | 1,822 |
| 3 | March 15, 2021 06:45 | March 15, 2021 10:15 | 3h 30m | 506 | 854 |
| 4 | September 2, 2021 08:45 | September 2, 2021 10:30 | 1h 45m | 252 | 379 |
| 5 | August 8, 2021 04:15 | August 8, 2021 08:00 | 3h 45m | 237 | 830 |
| 6 | September 13, 2021 16:00 | September 13, 2021 17:45 | 1h 45m | 63 | 110 |
| 7 | March 28, 2021 00:30 | March 28, 2021 04:15 | 3h 45m | 38 | 106 |
| 8 | March 12, 2021 15:15 | March 12, 2021 18:30 | 3h 15m | 29 | 94 |
| 9 | December 14, 2021 15:00 | December 14, 2021 21:15 | 6h 15m | 26 | 163 |
| 10 | November 11, 2021 16:15 | November 11, 2021 18:30 | 2h 15m | 24 | 30 |
Outage episodes by size in 2021: 5 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 Spink 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2021 | 1.5 hrs | 0.95 | 81 min | 0.83 |
| Northern Electric Coop, Inc | 2021 | 2.0 hrs | 1.20 | 1.9 hrs | 1.18 |
| 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 79% of South Dakota's customers in 2021; 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, 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/south-dakota/spink-county