County annual report · FIPS 46019
2019 Butte County, SD Power Outage Report
In 2019, customers in Butte County, SD went without power for an average of 0.9 hours, a total of 4,193 customer-hours (South Dakota average 3.8 hours). That ranks 34th worst of 58 South Dakota counties and 2541st of 2,945 nationally.
Compared with SD, the US and 2018
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Butte County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 10, 2019 14:15 | July 20, 2019 18:00 | 10d 3h | 155 | 970 |
| 2 | June 25, 2019 17:30 | June 26, 2019 19:15 | 1d 1h | 153 | 354 |
| 3 | December 15, 2019 23:15 | December 16, 2019 04:00 | 4h 45m | 151 | 190 |
| 4 | July 3, 2019 00:15 | July 3, 2019 03:00 | 2h 45m | 111 | 206 |
| 5 | April 11, 2019 17:15 | April 11, 2019 19:15 | 2h | 83 | 117 |
| 6 | May 17, 2019 08:45 | May 17, 2019 13:00 | 4h 15m | 83 | 167 |
| 7 | December 4, 2019 02:45 | December 4, 2019 04:15 | 1h 30m | 47 | 71 |
| 8 | September 1, 2019 09:15 | September 1, 2019 11:00 | 1h 45m | 45 | 52 |
| 9 | September 23, 2019 19:15 | September 23, 2019 20:00 | 45m | 40 | 26 |
| 10 | June 20, 2019 05:15 | June 20, 2019 06:00 | 45m | 38 | 29 |
Outage episodes by size in 2019: 4 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 2019, 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. | 2018 | 3.8 hrs | 1.21 | 3.7 hrs | 1.17 |
| 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 87% of South Dakota's customers in 2019; 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, 2019, 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/2019/south-dakota/butte-county