County annual report · FIPS 46063
2024 Harding County, SD Power Outage Report
In 2024, customers in Harding County, SD went without power for an average of 47.6 hours, a total of 19K customer-hours (South Dakota average 2.3 hours). That ranks 1st worst of 65 South Dakota counties and 216th 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 Harding 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 18, 2024 21:15 | November 18, 2024 23:45 | 2h 30m | 1,532 | 2,429 |
| 2 | September 11, 2024 19:45 | September 12, 2024 14:30 | 18h 45m | 632 | 5,490 |
| 3 | February 8, 2024 23:45 | February 9, 2024 03:30 | 3h 45m | 543 | 1,086 |
| 4 | January 5, 2024 17:30 | January 6, 2024 02:45 | 9h 15m | 344 | 1,178 |
| 5 | June 22, 2024 11:00 | June 24, 2024 15:00 | 2d 4h | 318 | 579 |
| 6 | October 28, 2024 18:15 | October 28, 2024 20:15 | 2h | 288 | 76 |
| 7 | February 8, 2024 19:15 | February 8, 2024 23:00 | 3h 45m | 280 | 677 |
| 8 | February 17, 2024 17:45 | February 19, 2024 15:30 | 1d 21h | 279 | 345 |
| 9 | December 10, 2024 14:45 | December 10, 2024 15:45 | 1h | 210 | 96 |
| 10 | March 21, 2024 15:00 | March 21, 2024 15:45 | 45m | 175 | 97 |
Outage episodes by size in 2024: 15 reached 100+ customers, 1 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 Harding 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 | - | - | - | - | - |
| Southeast Electric 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 n/a of South Dakota's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 403 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. Harding County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Harding 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/harding-county