County annual report · FIPS 46063
2019 Harding County, SD Power Outage Report
In 2019, customers in Harding County, SD went without power for an average of 16.2 hours, a total of 6,548 customer-hours (South Dakota average 3.8 hours). That ranks 4th worst of 58 South Dakota counties and 291st of 2,945 nationally.
Compared with SD, the US and 2018
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Harding County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 5, 2019 04:15 | September 5, 2019 13:30 | 9h 15m | 137 | 623 |
| 2 | November 22, 2019 23:30 | November 25, 2019 15:00 | 2d 15h | 108 | 466 |
| 3 | September 18, 2019 03:15 | September 18, 2019 14:00 | 10h 45m | 106 | 211 |
| 4 | July 17, 2019 18:45 | July 17, 2019 22:00 | 3h 15m | 90 | 51 |
| 5 | August 18, 2019 03:00 | August 19, 2019 14:00 | 1d 11h | 89 | 1,812 |
| 6 | August 12, 2019 05:45 | August 13, 2019 14:00 | 1d 8h | 84 | 266 |
| 7 | July 9, 2019 06:15 | July 9, 2019 20:00 | 13h 45m | 83 | 588 |
| 8 | November 2, 2019 14:15 | November 4, 2019 17:00 | 2d 2h | 83 | 157 |
| 9 | July 19, 2019 08:30 | July 20, 2019 18:00 | 1d 9h | 81 | 680 |
| 10 | August 4, 2019 17:15 | August 4, 2019 18:45 | 1h 30m | 64 | 95 |
Outage episodes by size in 2019: 3 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 2019, 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 87% of South Dakota's customers in 2019; 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, 2019, 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/2019/south-dakota/harding-county