County annual report · FIPS 46109
2023 Roberts County, SD Power Outage Report
In 2023, customers in Roberts County, SD went without power for an average of 3.7 hours, a total of 15K customer-hours (South Dakota average 2.3 hours). That ranks 14th worst of 61 South Dakota counties and 1730th 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 Roberts 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 | March 31, 2023 22:15 | April 1, 2023 20:15 | 22h | 1,175 | 3,351 |
| 2 | April 5, 2023 19:15 | April 5, 2023 22:15 | 3h | 626 | 556 |
| 3 | December 25, 2023 21:45 | December 28, 2023 21:30 | 2d 23h | 601 | 1,859 |
| 4 | June 28, 2023 16:15 | July 6, 2023 14:30 | 7d 22h | 378 | 1,256 |
| 5 | May 20, 2023 18:45 | May 20, 2023 21:15 | 2h 30m | 361 | 637 |
| 6 | October 13, 2023 20:00 | October 13, 2023 23:15 | 3h 15m | 360 | 273 |
| 7 | March 31, 2023 06:00 | March 31, 2023 12:15 | 6h 15m | 234 | 268 |
| 8 | May 8, 2023 22:00 | May 9, 2023 02:30 | 4h 30m | 206 | 215 |
| 9 | October 26, 2023 21:30 | October 27, 2023 23:15 | 1d 1h | 206 | 327 |
| 10 | August 7, 2023 13:00 | August 7, 2023 21:30 | 8h 30m | 198 | 1,530 |
Outage episodes by size in 2023: 14 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 Roberts 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 |
| Whetstone Valley Elec Coop Inc | 2018 | 73 min | 0.64 | 42 min | 0.43 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Codington-Clark Elec Coop, Inc | - | - | - | - | - |
| Traverse Electric Coop, Inc | - | - | - | - | - |
| Lake Region Electric Assn, Inc - (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 ÷ 4,096 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. Roberts County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Roberts 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/roberts-county