County annual report · FIPS 46047
2016 Fall River County, SD Power Outage Report
In 2016, customers in Fall River County, SD went without power for an average of 1.0 hours, a total of 3,953 customer-hours (South Dakota average 0.9 hours). That ranks 6th worst of 15 South Dakota counties and 1802nd 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 Fall River 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 17:30 | February 11, 2016 18:15 | 45m | 3,277 | 2,458 |
| 2 | June 28, 2016 22:45 | June 29, 2016 00:30 | 1h 45m | 301 | 473 |
| 3 | August 24, 2016 18:45 | August 24, 2016 21:30 | 2h 45m | 86 | 237 |
| 4 | July 18, 2016 09:45 | July 18, 2016 11:00 | 1h 15m | 34 | 43 |
| 5 | July 29, 2016 12:30 | July 29, 2016 13:00 | 30m | 32 | 16 |
| 6 | March 3, 2016 15:30 | March 3, 2016 21:15 | 5h 45m | 30 | 49 |
| 7 | July 31, 2016 04:00 | July 31, 2016 05:15 | 1h 15m | 28 | 8 |
| 8 | June 15, 2016 13:45 | June 15, 2016 14:00 | 15m | 27 | 7 |
| 9 | September 24, 2016 03:30 | September 24, 2016 04:30 | 1h | 27 | 21 |
| 10 | August 14, 2016 14:15 | August 14, 2016 14:30 | 15m | 12 | 3 |
Outage episodes by size in 2016: 2 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 Fall River 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 |
| Black Hills Electric Coop, Inc | 2016 | 4.1 hrs | 1.26 | 66 min | 0.46 |
| 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 2016; 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, 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/fall-river-county