County annual report · FIPS 46057
2024 Hamlin County, SD Power Outage Report
In 2024, customers in Hamlin County, SD went without power for an average of 3.7 hours, a total of 8,141 customer-hours (South Dakota average 2.3 hours). That ranks 16th worst of 65 South Dakota counties and 1918th of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Hamlin County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 29, 2024 21:30 | October 29, 2024 21:45 | 15m | 913 | 228 |
| 2 | May 6, 2024 22:15 | May 7, 2024 14:30 | 16h 15m | 652 | 2,569 |
| 3 | July 5, 2024 02:00 | July 5, 2024 02:45 | 45m | 398 | 200 |
| 4 | March 22, 2024 16:45 | March 22, 2024 18:00 | 1h 15m | 282 | 353 |
| 5 | April 4, 2024 04:00 | April 4, 2024 06:15 | 2h 15m | 282 | 564 |
| 6 | June 13, 2024 16:45 | June 13, 2024 17:45 | 1h | 196 | 50 |
| 7 | September 9, 2024 23:30 | September 10, 2024 00:00 | 30m | 137 | 69 |
| 8 | August 4, 2024 00:30 | August 4, 2024 02:15 | 1h 45m | 127 | 222 |
| 9 | August 4, 2024 11:15 | August 4, 2024 12:15 | 1h | 127 | 127 |
| 10 | June 22, 2024 14:45 | June 22, 2024 16:15 | 1h 30m | 97 | 97 |
Outage episodes by size in 2024: 9 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 2024, 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 | 2024 | 2.6 hrs | 1.37 | 1.9 hrs | 1.09 |
| NorthWestern Energy - (SD) | 2024 | 76 min | 0.70 | 66 min | 0.65 |
| Sioux Valley SW Elec Coop | 2024 | 46 min | 0.92 | 46 min | 0.92 |
| 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 2024; 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, 2024, 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/2024/south-dakota/hamlin-county