County annual report · FIPS 46019
2020 Butte County, SD Power Outage Report
In 2020, customers in Butte County, SD went without power for an average of 2.3 hours, a total of 11K customer-hours (South Dakota average 4.6 hours). That ranks 41st worst of 62 South Dakota counties and 2125th 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 Butte 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 | June 19, 2020 20:15 | July 9, 2020 19:00 | 19d 22h | 178 | 3,038 |
| 2 | February 4, 2020 21:30 | February 25, 2020 16:00 | 20d 18h | 175 | 1,891 |
| 3 | October 6, 2020 18:15 | October 6, 2020 21:30 | 3h 15m | 168 | 546 |
| 4 | October 8, 2020 11:15 | October 8, 2020 21:15 | 10h | 168 | 1,680 |
| 5 | March 17, 2020 16:45 | March 17, 2020 17:00 | 15m | 163 | 41 |
| 6 | January 2, 2020 18:45 | January 2, 2020 21:45 | 3h | 151 | 453 |
| 7 | June 5, 2020 15:30 | June 7, 2020 19:30 | 2d 4h | 96 | 986 |
| 8 | March 16, 2020 20:00 | March 16, 2020 20:30 | 30m | 83 | 42 |
| 9 | April 8, 2020 20:45 | April 8, 2020 21:15 | 30m | 83 | 37 |
| 10 | May 12, 2020 20:30 | May 12, 2020 22:00 | 1h 30m | 77 | 62 |
Outage episodes by size in 2020: 6 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 Butte 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2020 | 63 min | 0.56 | 30 min | 0.36 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
| Butte 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 79% of South Dakota's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,717 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. Butte County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Butte 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/butte-county