County annual report · FIPS 46071
2021 Jackson County, SD Power Outage Report
In 2021, customers in Jackson County, SD went without power for an average of 10.4 hours, a total of 9,552 customer-hours (South Dakota average 3.4 hours). That ranks 6th worst of 61 South Dakota counties and 753rd 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 Jackson 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 | March 14, 2021 22:15 | March 17, 2021 12:30 | 2d 14h | 439 | 7,271 |
| 2 | February 7, 2021 10:30 | February 7, 2021 12:15 | 1h 45m | 111 | 162 |
| 3 | July 16, 2021 15:15 | July 17, 2021 05:00 | 13h 45m | 83 | 351 |
| 4 | July 6, 2021 01:45 | July 6, 2021 03:45 | 2h | 78 | 156 |
| 5 | May 1, 2021 22:15 | May 2, 2021 01:30 | 3h 15m | 54 | 176 |
| 6 | December 13, 2021 15:45 | December 13, 2021 16:00 | 15m | 53 | 13 |
| 7 | April 22, 2021 17:15 | April 22, 2021 19:15 | 2h | 43 | 57 |
| 8 | February 23, 2021 04:45 | February 23, 2021 05:30 | 45m | 39 | 29 |
| 9 | June 21, 2021 20:15 | June 21, 2021 21:30 | 1h 15m | 35 | 44 |
| 10 | March 24, 2021 15:30 | March 24, 2021 15:45 | 15m | 32 | 8 |
Outage episodes by size in 2021: 2 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 Jackson 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 |
|---|---|---|---|---|---|
| West Central Electric Coop Inc - (SD) | 2018 | 3.7 hrs | 1.25 | 1.5 hrs | 1.25 |
| West River Electric Assn Inc | 2021 | 54 min | 0.72 | 54 min | 0.72 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| LaCreek Electric Assn, 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 ÷ 915 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. Jackson County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Jackson 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/jackson-county