County annual report · FIPS 46009
2020 Bon Homme County, SD Power Outage Report
In 2020, customers in Bon Homme County, SD went without power for an average of 5.4 hours, a total of 16K customer-hours (South Dakota average 4.6 hours). That ranks 21st worst of 62 South Dakota counties and 1327th of 3,019 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Bon Homme 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 | November 8, 2020 20:30 | November 9, 2020 04:15 | 7h 45m | 1,101 | 3,246 |
| 2 | March 6, 2020 22:15 | March 7, 2020 00:45 | 2h 30m | 705 | 1,172 |
| 3 | December 22, 2020 14:00 | December 22, 2020 18:00 | 4h | 576 | 2,174 |
| 4 | August 20, 2020 07:00 | August 20, 2020 11:15 | 4h 15m | 537 | 2,277 |
| 5 | June 20, 2020 19:00 | June 20, 2020 23:15 | 4h 15m | 372 | 926 |
| 6 | July 17, 2020 13:45 | July 17, 2020 20:00 | 6h 15m | 306 | 660 |
| 7 | June 9, 2020 15:00 | June 9, 2020 17:00 | 2h | 209 | 212 |
| 8 | June 8, 2020 10:00 | June 8, 2020 14:15 | 4h 15m | 193 | 490 |
| 9 | June 24, 2020 14:45 | June 25, 2020 00:30 | 9h 45m | 87 | 296 |
| 10 | May 30, 2020 18:15 | June 1, 2020 07:00 | 1d 12h | 85 | 2,683 |
Outage episodes by size in 2020: 8 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 Bon Homme 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2020 | 2.6 hrs | 1.54 | 1.9 hrs | 1.28 |
| Bon Homme Yankton El Assn, Inc | 2018 | 34 min | 0.32 | 34 min | 0.32 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Charles Mix Electric Assn, Inc | - | - | - | - | - |
| City of Tyndall - (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 ÷ 2,917 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. Bon Homme County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Bon Homme 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/bon-homme-county