County annual report · FIPS 46031
2022 Corson County, SD Power Outage Report
In 2022, customers in Corson County, SD went without power for an average of 0.8 hours, a total of 1,534 customer-hours (South Dakota average 6.9 hours). That ranks 58th worst of 63 South Dakota counties and 2766th of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Corson County, 2022
The 7 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 3, 2022 12:15 | April 3, 2022 18:45 | 6h 30m | 141 | 856 |
| 2 | April 24, 2022 01:15 | April 24, 2022 04:00 | 2h 45m | 141 | 376 |
| 3 | June 7, 2022 17:15 | June 7, 2022 18:15 | 1h | 132 | 129 |
| 4 | June 20, 2022 04:15 | June 20, 2022 04:30 | 15m | 115 | 29 |
| 5 | April 13, 2022 21:45 | April 14, 2022 14:45 | 17h | 5 | 85 |
| 6 | April 24, 2022 13:15 | April 25, 2022 00:15 | 11h | 5 | 55 |
| 7 | July 26, 2022 17:15 | July 26, 2022 18:15 | 1h | 5 | 5 |
Outage episodes by size in 2022: 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 Corson County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
| Moreau-Grand Electric Coop Inc | - | - | - | - | - |
| City of McLaughlin - (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 89% of South Dakota's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,975 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. Corson County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Corson County, SD annual power outage report, 2022, 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/2022/south-dakota/corson-county