County annual report · FIPS 46047
2017 Fall River County, SD Power Outage Report
In 2017, customers in Fall River County, SD went without power for an average of 0.8 hours, a total of 3,073 customer-hours (South Dakota average 0.8 hours). That ranks 11th worst of 26 South Dakota counties and 2159th 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 Fall River 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 | June 30, 2017 14:30 | June 30, 2017 15:30 | 1h | 458 | 458 |
| 2 | July 1, 2017 00:15 | July 1, 2017 00:45 | 30m | 458 | 229 |
| 3 | April 28, 2017 16:00 | April 28, 2017 17:15 | 1h 15m | 171 | 214 |
| 4 | June 13, 2017 05:30 | June 13, 2017 18:45 | 13h 15m | 90 | 1,193 |
| 5 | November 10, 2017 21:15 | November 11, 2017 01:00 | 3h 45m | 88 | 330 |
| 6 | June 6, 2017 03:30 | June 6, 2017 11:30 | 8h | 52 | 261 |
| 7 | August 16, 2017 12:45 | August 16, 2017 13:00 | 15m | 33 | 8 |
| 8 | June 3, 2017 00:30 | June 3, 2017 01:30 | 1h | 31 | 31 |
| 9 | December 17, 2017 17:45 | December 17, 2017 21:45 | 4h | 15 | 37 |
| 10 | August 31, 2017 14:00 | August 31, 2017 21:00 | 7h | 14 | 98 |
Outage episodes by size in 2017: 3 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 Fall River 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 |
| Black Hills Electric Coop, Inc | 2017 | 1.6 hrs | 0.96 | 1.6 hrs | 0.96 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Niobrara Electric Assn, Inc | - | - | - | - | - |
| Black Hills Energy | - | - | - | - | - |
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 ÷ 4,055 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. Fall River County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Fall River 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/fall-river-county