County annual report · FIPS 46057
2023 Hamlin County, SD Power Outage Report
In 2023, customers in Hamlin County, SD went without power for an average of 7.8 hours, a total of 17K customer-hours (South Dakota average 2.3 hours). That ranks 6th worst of 61 South Dakota counties and 1048th 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 Hamlin 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 | August 5, 2023 17:45 | August 5, 2023 20:45 | 3h | 629 | 1,887 |
| 2 | January 25, 2023 10:30 | January 25, 2023 15:45 | 5h 15m | 575 | 2,552 |
| 3 | December 14, 2023 16:45 | December 14, 2023 17:30 | 45m | 489 | 367 |
| 4 | April 17, 2023 14:30 | April 17, 2023 20:00 | 5h 30m | 441 | 1,956 |
| 5 | June 22, 2023 22:15 | June 23, 2023 13:30 | 15h 15m | 419 | 3,326 |
| 6 | February 27, 2023 19:15 | February 27, 2023 23:00 | 3h 45m | 360 | 1,350 |
| 7 | November 2, 2023 19:00 | November 2, 2023 22:30 | 3h 30m | 322 | 1,127 |
| 8 | January 22, 2023 06:30 | January 22, 2023 11:00 | 4h 30m | 207 | 879 |
| 9 | December 26, 2023 00:30 | December 26, 2023 03:15 | 2h 45m | 196 | 539 |
| 10 | January 9, 2023 21:30 | January 9, 2023 23:15 | 1h 45m | 194 | 258 |
Outage episodes by size in 2023: 12 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 Hamlin 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2023 | 2.4 hrs | 1.78 | 1.9 hrs | 1.68 |
| NorthWestern Energy - (SD) | 2023 | 1.9 hrs | 1.37 | 74 min | 1.03 |
| Sioux Valley SW Elec Coop | 2023 | 60 min | 1.46 | 60 min | 1.46 |
| 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 n/a of South Dakota's customers in 2023; 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, 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/south-dakota/hamlin-county