County annual report · FIPS 46117
2020 Stanley County, SD Power Outage Report
In 2020, customers in Stanley County, SD went without power for an average of 5.0 hours, a total of 13K customer-hours (South Dakota average 4.6 hours). That ranks 24th worst of 62 South Dakota counties and 1402nd of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Stanley County, 2020
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 20, 2020 15:15 | October 21, 2020 13:30 | 22h 15m | 197 | 4,285 |
| 2 | September 5, 2020 18:30 | September 5, 2020 23:30 | 5h | 196 | 497 |
| 3 | June 29, 2020 05:15 | June 29, 2020 07:30 | 2h 15m | 141 | 247 |
| 4 | June 29, 2020 10:15 | June 29, 2020 13:00 | 2h 45m | 141 | 365 |
| 5 | August 26, 2020 22:00 | August 27, 2020 21:30 | 23h 30m | 141 | 1,651 |
| 6 | December 16, 2020 21:15 | December 16, 2020 22:15 | 1h | 135 | 135 |
| 7 | June 15, 2020 04:00 | June 15, 2020 08:30 | 4h 30m | 127 | 476 |
| 8 | June 8, 2020 07:00 | June 8, 2020 13:45 | 6h 45m | 90 | 326 |
| 9 | January 15, 2020 09:15 | January 15, 2020 14:45 | 5h 30m | 84 | 58 |
| 10 | April 15, 2020 15:45 | April 15, 2020 16:15 | 30m | 71 | 20 |
Outage episodes by size in 2020: 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 Stanley County reported on EIA Form 861 for 2020, 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 | - | - | - | - | - |
| City of Fort Pierre - (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 79% of South Dakota's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,520 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. Stanley County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Stanley County, SD annual power outage report, 2020, 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/2020/south-dakota/stanley-county