County annual report · FIPS 46103
2016 Pennington County, SD Power Outage Report
In 2016, customers in Pennington County, SD went without power for an average of 0.6 hours, a total of 43K customer-hours (South Dakota average 0.9 hours). That ranks 10th worst of 15 South Dakota counties and 1949th of 2,391 nationally.
Compared with SD, the US and 2015
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Pennington 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 10, 2016 12:45 | February 14, 2016 06:30 | 3d 17h | 22,078 | 17K |
| 2 | February 19, 2016 20:30 | February 19, 2016 21:30 | 1h | 4,872 | 3,566 |
| 3 | August 10, 2016 05:00 | August 10, 2016 05:45 | 45m | 3,883 | 1,883 |
| 4 | March 30, 2016 15:30 | March 30, 2016 15:45 | 15m | 1,288 | 322 |
| 5 | July 19, 2016 00:00 | July 19, 2016 11:15 | 11h 15m | 705 | 2,004 |
| 6 | February 4, 2016 16:15 | February 8, 2016 17:15 | 4d 1h | 614 | 2,131 |
| 7 | October 16, 2016 17:00 | October 16, 2016 21:30 | 4h 30m | 565 | 1,397 |
| 8 | September 15, 2016 17:30 | September 15, 2016 18:30 | 1h | 519 | 519 |
| 9 | September 7, 2016 15:15 | September 15, 2016 05:00 | 7d 13h | 480 | 618 |
| 10 | June 14, 2016 03:15 | June 14, 2016 04:15 | 1h | 426 | 423 |
Outage episodes by size in 2016: 30 reached 100+ customers, 4 reached 1,000+ customers, 1 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 Pennington 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 | - | - | - | - | - |
| Black Hills Energy | - | - | - | - | - |
| West River Electric Assn 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 ÷ 68,130 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. Pennington County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pennington 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/pennington-county