County annual report · FIPS 46047
2019 Fall River County, SD Power Outage Report
In 2019, customers in Fall River County, SD went without power for an average of 1.0 hours, a total of 4,256 customer-hours (South Dakota average 3.8 hours). That ranks 30th worst of 58 South Dakota counties and 2473rd 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 Fall River 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 15, 2019 14:15 | July 16, 2019 00:30 | 10h 15m | 965 | 1,174 |
| 2 | April 16, 2019 04:15 | April 16, 2019 05:30 | 1h 15m | 588 | 735 |
| 3 | November 4, 2019 19:00 | November 4, 2019 19:30 | 30m | 482 | 241 |
| 4 | October 20, 2019 23:45 | October 21, 2019 06:30 | 6h 45m | 481 | 542 |
| 5 | May 30, 2019 19:30 | May 30, 2019 20:45 | 1h 15m | 181 | 226 |
| 6 | April 24, 2019 15:30 | April 24, 2019 15:45 | 15m | 179 | 45 |
| 7 | September 10, 2019 18:00 | September 10, 2019 20:30 | 2h 30m | 127 | 259 |
| 8 | April 4, 2019 19:15 | April 4, 2019 19:45 | 30m | 97 | 49 |
| 9 | May 19, 2019 00:15 | May 19, 2019 02:00 | 1h 45m | 77 | 135 |
| 10 | December 2, 2019 18:45 | December 3, 2019 00:00 | 5h 15m | 34 | 48 |
Outage episodes by size in 2019: 7 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 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 |
| Black Hills Electric Coop, Inc | 2018 | 68 min | 0.92 | 68 min | 0.92 |
| 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 87% of South Dakota's customers in 2019; 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, 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/fall-river-county