County annual report · FIPS 46031
2024 Corson County, SD Power Outage Report
In 2024, customers in Corson County, SD went without power for an average of 2.8 hours, a total of 5,506 customer-hours (South Dakota average 2.3 hours). That ranks 23rd worst of 65 South Dakota counties and 2163rd of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Corson County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 27, 2024 16:15 | November 27, 2024 18:45 | 2h 30m | 281 | 703 |
| 2 | July 14, 2024 05:00 | July 14, 2024 16:15 | 11h 15m | 224 | 1,589 |
| 3 | November 13, 2024 04:00 | November 13, 2024 18:45 | 14h 45m | 209 | 443 |
| 4 | September 22, 2024 04:30 | September 22, 2024 06:00 | 1h 30m | 207 | 220 |
| 5 | August 6, 2024 13:15 | August 6, 2024 15:30 | 2h 15m | 162 | 276 |
| 6 | July 15, 2024 13:15 | July 15, 2024 15:15 | 2h | 146 | 159 |
| 7 | June 12, 2024 18:15 | June 12, 2024 23:45 | 5h 30m | 135 | 725 |
| 8 | July 31, 2024 13:15 | July 31, 2024 14:00 | 45m | 119 | 61 |
| 9 | February 9, 2024 04:00 | February 9, 2024 04:15 | 15m | 111 | 28 |
| 10 | May 18, 2024 01:15 | May 18, 2024 01:30 | 15m | 99 | 25 |
Outage episodes by size in 2024: 9 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 2024, 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 | 2024 | 2.9 hrs | 1.26 | 2.1 hrs | 1.10 |
| 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 n/a of South Dakota's customers in 2024; 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, 2024, 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/2024/south-dakota/corson-county