County annual report · FIPS 46025
2022 Clark County, SD Power Outage Report
In 2022, customers in Clark County, SD went without power for an average of 10.8 hours, a total of 17K customer-hours (South Dakota average 6.9 hours). That ranks 22nd worst of 63 South Dakota counties and 663rd of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Clark County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 13, 2022 09:45 | December 15, 2022 03:15 | 1d 17h | 831 | 5,616 |
| 2 | May 12, 2022 23:15 | May 13, 2022 15:00 | 15h 45m | 676 | 2,807 |
| 3 | April 20, 2022 11:45 | April 20, 2022 14:15 | 2h 30m | 475 | 1,059 |
| 4 | April 7, 2022 19:15 | April 7, 2022 21:30 | 2h 15m | 440 | 881 |
| 5 | June 28, 2022 20:45 | June 28, 2022 22:15 | 1h 30m | 432 | 540 |
| 6 | June 21, 2022 03:00 | June 21, 2022 09:30 | 6h 30m | 411 | 569 |
| 7 | July 11, 2022 09:15 | July 11, 2022 13:15 | 4h | 410 | 1,102 |
| 8 | September 9, 2022 07:30 | September 9, 2022 10:30 | 3h | 389 | 1,167 |
| 9 | September 16, 2022 08:15 | September 16, 2022 10:30 | 2h 15m | 389 | 875 |
| 10 | May 13, 2022 17:15 | May 13, 2022 23:00 | 5h 45m | 325 | 1,869 |
Outage episodes by size in 2022: 10 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 Clark County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2022 | 2.1 hrs | 1.26 | 80 min | 1.01 |
| Northern Electric Coop, Inc | 2022 | 5.1 hrs | 1.09 | 1.8 hrs | 0.77 |
| H-D Electric Coop Inc | 2018 | 2.6 hrs | 1.52 | 1.6 hrs | 1.14 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Codington-Clark Elec Coop, Inc | - | - | - | - | - |
| Kingsbury 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 89% of South Dakota's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,587 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. Clark County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Clark County, SD annual power outage report, 2022, 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/2022/south-dakota/clark-county