County annual report · FIPS 46063
2023 Harding County, SD Power Outage Report
In 2023, customers in Harding County, SD went without power for an average of 31.1 hours, a total of 13K customer-hours (South Dakota average 2.3 hours). That ranks 1st worst of 61 South Dakota counties and 225th of 2,977 nationally.
Compared with SD, the US and 2022
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Harding County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 27, 2023 17:30 | February 27, 2023 21:30 | 4h | 417 | 150 |
| 2 | March 10, 2023 17:00 | March 10, 2023 19:30 | 2h 30m | 375 | 397 |
| 3 | March 11, 2023 18:15 | March 11, 2023 19:30 | 1h 15m | 294 | 228 |
| 4 | October 17, 2023 23:30 | October 18, 2023 14:00 | 14h 30m | 278 | 1,231 |
| 5 | May 8, 2023 02:30 | May 8, 2023 21:15 | 18h 45m | 262 | 4,144 |
| 6 | May 17, 2023 17:45 | May 17, 2023 20:00 | 2h 15m | 202 | 420 |
| 7 | July 15, 2023 19:15 | July 15, 2023 20:15 | 1h | 146 | 85 |
| 8 | August 7, 2023 12:00 | August 7, 2023 14:30 | 2h 30m | 145 | 250 |
| 9 | November 8, 2023 21:45 | November 8, 2023 23:15 | 1h 30m | 140 | 210 |
| 10 | June 24, 2023 03:00 | June 26, 2023 14:30 | 2d 11h | 137 | 995 |
Outage episodes by size in 2023: 13 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 Harding County reported on EIA Form 861 for 2023, 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 | - | - | - | - | - |
| 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 2023; 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, 2023, 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/2023/south-dakota/harding-county