County annual report · FIPS 46033
2016 Custer County, SD Power Outage Report
In 2016, customers in Custer County, SD went without power for an average of 1.5 hours, a total of 6,588 customer-hours (South Dakota average 0.9 hours). That ranks 2nd worst of 15 South Dakota counties and 1554th 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 Custer 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 | June 27, 2016 21:30 | June 27, 2016 22:45 | 1h 15m | 694 | 640 |
| 2 | June 13, 2016 05:15 | June 13, 2016 08:00 | 2h 45m | 692 | 1,071 |
| 3 | May 25, 2016 16:00 | May 25, 2016 16:15 | 15m | 540 | 135 |
| 4 | May 28, 2016 08:15 | May 28, 2016 15:00 | 6h 45m | 285 | 1,734 |
| 5 | February 19, 2016 20:15 | February 19, 2016 23:00 | 2h 45m | 251 | 258 |
| 6 | June 13, 2016 22:30 | June 14, 2016 03:30 | 5h | 231 | 396 |
| 7 | April 6, 2016 04:00 | April 6, 2016 20:45 | 16h 45m | 135 | 387 |
| 8 | February 19, 2016 08:45 | February 19, 2016 11:15 | 2h 30m | 108 | 160 |
| 9 | March 26, 2016 01:45 | March 26, 2016 07:15 | 5h 30m | 72 | 396 |
| 10 | July 19, 2016 03:45 | July 19, 2016 12:15 | 8h 30m | 64 | 102 |
Outage episodes by size in 2016: 8 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 Custer 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 | - | - | - | - | - |
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 ÷ 4,481 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. Custer County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Custer 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/custer-county