County annual report · FIPS 46063
2020 Harding County, SD Power Outage Report
In 2020, customers in Harding County, SD went without power for an average of 90.2 hours, a total of 36K customer-hours (South Dakota average 4.6 hours). That ranks 1st worst of 62 South Dakota counties and 74th of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Harding County, 2020
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 17, 2020 16:45 | March 17, 2020 17:00 | 15m | 420 | 105 |
| 2 | March 8, 2020 02:30 | March 8, 2020 04:00 | 1h 30m | 414 | 449 |
| 3 | September 8, 2020 20:00 | September 9, 2020 15:15 | 19h 15m | 413 | 7,494 |
| 4 | September 12, 2020 23:00 | September 14, 2020 13:30 | 1d 14h | 413 | 1,651 |
| 5 | October 7, 2020 13:15 | October 8, 2020 21:15 | 1d 8h | 412 | 2,176 |
| 6 | July 8, 2020 02:30 | July 8, 2020 17:30 | 15h | 282 | 731 |
| 7 | November 30, 2020 18:45 | November 30, 2020 20:00 | 1h 15m | 273 | 143 |
| 8 | June 16, 2020 16:30 | June 17, 2020 04:00 | 11h 30m | 268 | 3,082 |
| 9 | April 24, 2020 21:45 | April 27, 2020 19:45 | 2d 22h | 265 | 941 |
| 10 | June 29, 2020 07:15 | June 29, 2020 10:15 | 3h | 262 | 786 |
Outage episodes by size in 2020: 19 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 2020, 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 79% of South Dakota's customers in 2020; 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, 2020, 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/2020/south-dakota/harding-county