County annual report · FIPS 46109
2022 Roberts County, SD Power Outage Report
In 2022, customers in Roberts County, SD went without power for an average of 10.0 hours, a total of 41K customer-hours (South Dakota average 6.9 hours). That ranks 23rd worst of 63 South Dakota counties and 733rd of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Roberts County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 28, 2022 07:30 | December 28, 2022 11:15 | 3h 45m | 1,086 | 1,364 |
| 2 | July 4, 2022 11:45 | July 4, 2022 22:30 | 10h 45m | 832 | 4,797 |
| 3 | May 12, 2022 23:15 | May 13, 2022 15:00 | 15h 45m | 793 | 3,110 |
| 4 | December 14, 2022 08:15 | December 28, 2022 00:45 | 13d 16h | 668 | 1,176 |
| 5 | February 18, 2022 22:00 | February 20, 2022 18:00 | 1d 20h | 583 | 26K |
| 6 | July 12, 2022 15:45 | July 12, 2022 17:45 | 2h | 452 | 679 |
| 7 | October 24, 2022 01:30 | October 24, 2022 02:00 | 30m | 395 | 198 |
| 8 | September 15, 2022 13:45 | September 15, 2022 14:15 | 30m | 289 | 145 |
| 9 | May 10, 2022 09:45 | May 10, 2022 10:15 | 30m | 271 | 136 |
| 10 | May 9, 2022 12:15 | May 9, 2022 12:30 | 15m | 270 | 68 |
Outage episodes by size in 2022: 13 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 2022, 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 | 2022 | 6.2 hrs | 2.20 | 2.1 hrs | 1.80 |
| 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 89% of South Dakota's customers in 2022; 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, 2022, 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/2022/south-dakota/roberts-county