County annual report · FIPS 46019
2017 Butte County, SD Power Outage Report
In 2017, customers in Butte County, SD went without power for an average of 0.5 hours, a total of 2,485 customer-hours (South Dakota average 0.8 hours). That ranks 16th worst of 26 South Dakota counties and 2277th of 2,786 nationally.
Compared with SD, the US and 2016
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Butte County, 2017
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 4, 2017 07:45 | October 4, 2017 13:15 | 5h 30m | 604 | 1,466 |
| 2 | July 27, 2017 21:00 | July 27, 2017 23:15 | 2h 15m | 411 | 520 |
| 3 | May 25, 2017 18:30 | May 25, 2017 18:45 | 15m | 193 | 48 |
| 4 | September 15, 2017 15:30 | September 15, 2017 15:45 | 15m | 107 | 27 |
| 5 | February 23, 2017 18:15 | February 23, 2017 21:00 | 2h 45m | 101 | 179 |
| 6 | June 30, 2017 00:15 | June 30, 2017 02:00 | 1h 45m | 42 | 74 |
| 7 | November 29, 2017 14:30 | November 29, 2017 16:30 | 2h | 42 | 25 |
| 8 | July 26, 2017 14:00 | July 26, 2017 14:15 | 15m | 21 | 5 |
| 9 | March 30, 2017 16:30 | March 30, 2017 16:45 | 15m | 11 | 3 |
| 10 | October 16, 2017 16:15 | October 16, 2017 17:45 | 1h 30m | 10 | 15 |
Outage episodes by size in 2017: 5 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 2017, 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. | 2017 | 6.3 hrs | 1.90 | 68 min | 0.58 |
| 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 n/a of South Dakota's customers in 2017; 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, 2017, 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/2017/south-dakota/butte-county