County annual report · FIPS 46057
2019 Hamlin County, SD Power Outage Report
In 2019, customers in Hamlin County, SD went without power for an average of 1.2 hours, a total of 2,690 customer-hours (South Dakota average 3.8 hours). That ranks 28th worst of 58 South Dakota counties and 2405th 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 Hamlin 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 | October 30, 2019 17:45 | October 30, 2019 18:00 | 15m | 510 | 128 |
| 2 | November 14, 2019 19:15 | November 14, 2019 19:45 | 30m | 433 | 216 |
| 3 | December 3, 2019 18:15 | December 3, 2019 19:15 | 1h | 335 | 335 |
| 4 | June 27, 2019 10:45 | June 27, 2019 15:45 | 5h | 244 | 247 |
| 5 | September 16, 2019 16:30 | September 16, 2019 17:15 | 45m | 192 | 144 |
| 6 | September 12, 2019 00:00 | September 12, 2019 01:00 | 1h | 110 | 110 |
| 7 | October 10, 2019 12:15 | October 10, 2019 14:30 | 2h 15m | 105 | 168 |
| 8 | October 30, 2019 13:30 | October 30, 2019 15:15 | 1h 45m | 93 | 92 |
| 9 | December 22, 2019 22:15 | December 23, 2019 00:45 | 2h 30m | 81 | 203 |
| 10 | August 12, 2019 19:30 | August 12, 2019 20:15 | 45m | 63 | 45 |
Outage episodes by size in 2019: 7 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 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2018 | 1.8 hrs | 1.30 | 1.7 hrs | 1.23 |
| NorthWestern Energy - (SD) | 2018 | 1.9 hrs | 1.24 | 1.6 hrs | 1.13 |
| Sioux Valley SW Elec Coop | 2018 | 4.0 hrs | 3.62 | 2.0 hrs | 2.88 |
| 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 87% of South Dakota's customers in 2019; 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, 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2019/south-dakota/hamlin-county