County annual report · FIPS 46085
2022 Lyman County, SD Power Outage Report
In 2022, customers in Lyman County, SD went without power for an average of 4.0 hours, a total of 12K customer-hours (South Dakota average 6.9 hours). That ranks 34th worst of 63 South Dakota counties and 1656th 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 Lyman 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 | June 13, 2022 05:00 | June 13, 2022 16:15 | 11h 15m | 426 | 1,081 |
| 2 | August 6, 2022 00:15 | August 6, 2022 07:15 | 7h | 330 | 1,134 |
| 3 | December 14, 2022 16:00 | December 14, 2022 18:45 | 2h 45m | 196 | 494 |
| 4 | August 13, 2022 19:15 | August 15, 2022 16:30 | 1d 21h | 187 | 1,298 |
| 5 | March 18, 2022 23:00 | March 19, 2022 00:15 | 1h 15m | 183 | 183 |
| 6 | December 13, 2022 21:00 | December 14, 2022 00:30 | 3h 30m | 180 | 331 |
| 7 | July 17, 2022 10:45 | July 17, 2022 12:00 | 1h 15m | 168 | 210 |
| 8 | August 6, 2022 12:45 | August 6, 2022 13:45 | 1h | 168 | 168 |
| 9 | August 7, 2022 17:00 | August 7, 2022 18:15 | 1h 15m | 168 | 46 |
| 10 | November 29, 2022 03:45 | November 29, 2022 04:45 | 1h | 168 | 168 |
Outage episodes by size in 2022: 16 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 Lyman 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 |
|---|---|---|---|---|---|
| West Central Electric Coop Inc - (SD) | 2018 | 3.7 hrs | 1.25 | 1.5 hrs | 1.25 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Rosebud Electric Coop Inc | - | - | - | - | - |
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 ÷ 2,969 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. Lyman County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Lyman 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/lyman-county