County annual report · FIPS 46091
2023 Marshall County, SD Power Outage Report
In 2023, customers in Marshall County, SD went without power for an average of 19.9 hours, a total of 50K customer-hours (South Dakota average 2.3 hours). That ranks 4th worst of 61 South Dakota counties and 404th 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 Marshall 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 | July 27, 2023 03:00 | July 27, 2023 13:15 | 10h 15m | 872 | 813 |
| 2 | April 19, 2023 08:30 | April 19, 2023 12:45 | 4h 15m | 839 | 2,589 |
| 3 | March 29, 2023 07:45 | April 18, 2023 13:15 | 20d 5h | 328 | 3,208 |
| 4 | November 24, 2023 22:15 | November 24, 2023 23:00 | 45m | 289 | 146 |
| 5 | July 14, 2023 14:15 | July 19, 2023 16:00 | 5d 1h | 258 | 31K |
| 6 | August 24, 2023 18:45 | August 28, 2023 13:30 | 3d 18h | 180 | 224 |
| 7 | September 25, 2023 13:45 | September 25, 2023 18:15 | 4h 30m | 179 | 183 |
| 8 | September 26, 2023 15:45 | September 26, 2023 16:15 | 30m | 178 | 89 |
| 9 | October 19, 2023 14:00 | October 19, 2023 20:45 | 6h 45m | 177 | 1,195 |
| 10 | February 20, 2023 21:45 | February 20, 2023 22:00 | 15m | 158 | 40 |
Outage episodes by size in 2023: 17 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 Marshall 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 |
| Northern Electric Coop, Inc | 2023 | 74 min | 0.67 | 54 min | 0.55 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Traverse Electric Coop, Inc | - | - | - | - | - |
| Lake Region Electric Assn, Inc - (SD) | - | - | - | - | - |
| Town of Langford- (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 ÷ 2,509 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. Marshall County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Marshall 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/marshall-county