County annual report · FIPS 46039
2021 Deuel County, SD Power Outage Report
In 2021, customers in Deuel County, SD went without power for an average of 5.4 hours, a total of 8,190 customer-hours (South Dakota average 3.4 hours). That ranks 12th worst of 61 South Dakota counties and 1247th 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 Deuel 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 | October 22, 2021 22:30 | October 25, 2021 13:30 | 2d 15h | 145 | 498 |
| 2 | October 6, 2021 10:15 | October 6, 2021 16:30 | 6h 15m | 142 | 392 |
| 3 | October 8, 2021 09:15 | October 11, 2021 16:00 | 3d 6h | 142 | 450 |
| 4 | April 22, 2021 22:15 | April 22, 2021 23:30 | 1h 15m | 116 | 145 |
| 5 | July 17, 2021 13:30 | July 17, 2021 15:00 | 1h 30m | 93 | 94 |
| 6 | October 22, 2021 17:15 | October 22, 2021 19:30 | 2h 15m | 93 | 144 |
| 7 | October 22, 2021 20:30 | October 22, 2021 20:45 | 15m | 93 | 23 |
| 8 | July 17, 2021 23:30 | July 19, 2021 20:00 | 1d 20h | 80 | 3,371 |
| 9 | May 17, 2021 18:15 | May 17, 2021 20:00 | 1h 45m | 79 | 130 |
| 10 | May 14, 2021 18:15 | May 14, 2021 21:45 | 3h 30m | 72 | 252 |
Outage episodes by size in 2021: 4 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 Deuel 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2021 | 86 min | 1.13 | 74 min | 1.09 |
| NorthWestern Energy - (SD) | 2021 | 1.5 hrs | 0.95 | 81 min | 0.83 |
| Sioux Valley SW Elec Coop | 2021 | 1.8 hrs | 1.08 | 1.5 hrs | 0.93 |
| H-D Electric Coop Inc | 2018 | 2.6 hrs | 1.52 | 1.6 hrs | 1.14 |
| Whetstone Valley Elec Coop Inc | 2018 | 73 min | 0.64 | 42 min | 0.43 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Codington-Clark Elec Coop, Inc | - | - | - | - | - |
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 ÷ 1,505 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. Deuel County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Deuel 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/deuel-county