County annual report · FIPS 46019
2016 Butte County, SD Power Outage Report
In 2016, customers in Butte County, SD went without power for an average of 0.7 hours, a total of 3,339 customer-hours (South Dakota average 0.9 hours). That ranks 9th worst of 15 South Dakota counties and 1918th of 2,391 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Butte County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 11, 2016 16:30 | February 11, 2016 22:45 | 6h 15m | 2,382 | 1,814 |
| 2 | October 4, 2016 21:30 | October 4, 2016 22:15 | 45m | 615 | 461 |
| 3 | August 3, 2016 00:45 | August 3, 2016 04:15 | 3h 30m | 105 | 270 |
| 4 | August 13, 2016 15:00 | August 13, 2016 15:30 | 30m | 45 | 23 |
| 5 | September 24, 2016 11:45 | October 2, 2016 05:00 | 7d 17h | 44 | 342 |
| 6 | May 26, 2016 03:45 | May 26, 2016 04:00 | 15m | 38 | 10 |
| 7 | February 7, 2016 00:30 | February 7, 2016 01:15 | 45m | 31 | 23 |
| 8 | May 22, 2016 12:45 | May 22, 2016 13:00 | 15m | 28 | 7 |
| 9 | August 28, 2016 02:30 | August 28, 2016 02:45 | 15m | 28 | 7 |
| 10 | April 7, 2016 16:15 | April 7, 2016 21:00 | 4h 45m | 17 | 81 |
Outage episodes by size in 2016: 3 reached 100+ customers, 1 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 2016, 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. | 2016 | 1.8 hrs | 1.42 | 36 min | 0.69 |
| 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 2016; 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, 2016, 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/2016/south-dakota/butte-county