County annual report · FIPS 46057
2022 Hamlin County, SD Power Outage Report
In 2022, customers in Hamlin County, SD went without power for an average of 25.0 hours, a total of 55K customer-hours (South Dakota average 6.9 hours). That ranks 11th worst of 63 South Dakota counties and 249th 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 Hamlin 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 | May 12, 2022 22:30 | May 16, 2022 17:45 | 3d 19h | 2,092 | 42K |
| 2 | September 23, 2022 21:15 | September 23, 2022 22:00 | 45m | 638 | 479 |
| 3 | November 10, 2022 18:45 | November 10, 2022 19:00 | 15m | 468 | 117 |
| 4 | December 14, 2022 08:15 | December 15, 2022 16:45 | 1d 8h | 454 | 1,695 |
| 5 | December 13, 2022 06:45 | December 14, 2022 07:00 | 1d | 450 | 2,531 |
| 6 | June 8, 2022 13:15 | June 8, 2022 14:00 | 45m | 403 | 101 |
| 7 | June 21, 2022 03:30 | June 21, 2022 11:00 | 7h 30m | 303 | 1,746 |
| 8 | July 6, 2022 20:45 | July 7, 2022 13:30 | 16h 45m | 276 | 869 |
| 9 | May 28, 2022 16:00 | May 31, 2022 03:00 | 2d 11h | 192 | 1,176 |
| 10 | January 10, 2022 15:15 | January 10, 2022 16:30 | 1h 15m | 123 | 114 |
Outage episodes by size in 2022: 13 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 Hamlin 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2022 | 6.2 hrs | 2.20 | 2.1 hrs | 1.80 |
| NorthWestern Energy - (SD) | 2022 | 2.1 hrs | 1.26 | 80 min | 1.01 |
| Sioux Valley SW Elec Coop | 2022 | 11.5 hrs | 2.53 | 2.2 hrs | 1.66 |
| 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 | - | - | - | - | - |
| City of Bryant - (SD) | - | - | - | - | - |
| City of Estelline - (SD) | - | - | - | - | - |
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 ÷ 2,187 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. Hamlin County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Hamlin 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/hamlin-county