County annual report · FIPS 46102
2019 Oglala Lakota County, SD Power Outage Report
In 2019, customers in Oglala Lakota County, SD went without power for an average of 0.2 hours, a total of 724 customer-hours (South Dakota average 3.8 hours). That ranks 44th worst of 58 South Dakota counties and 2787th 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 Oglala Lakota 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 | November 30, 2019 18:30 | December 1, 2019 05:15 | 10h 45m | 68 | 662 |
| 2 | November 13, 2019 03:00 | November 13, 2019 03:15 | 15m | 14 | 4 |
| 3 | November 13, 2019 05:15 | November 13, 2019 06:15 | 1h | 14 | 14 |
| 4 | November 5, 2019 02:30 | November 5, 2019 04:30 | 2h | 13 | 22 |
| 5 | May 2, 2019 01:30 | May 2, 2019 03:30 | 2h | 1 | 2 |
| 6 | October 28, 2019 10:45 | October 28, 2019 13:15 | 2h 30m | 1 | 3 |
| 7 | October 30, 2019 02:00 | October 30, 2019 02:30 | 30m | 1 | 1 |
| 8 | October 30, 2019 10:00 | October 30, 2019 16:30 | 6h 30m | 1 | 7 |
| 9 | October 31, 2019 00:15 | October 31, 2019 03:00 | 2h 45m | 1 | 3 |
| 10 | October 31, 2019 05:15 | October 31, 2019 05:30 | 15m | 1 | 0 |
Outage episodes by size in 2019: 0 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 Oglala Lakota 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 |
|---|---|---|---|---|---|
| Nebraska Public Power District | 2018 | 2.6 hrs | 0.74 | 49 min | 0.60 |
| Black Hills Electric Coop, Inc | 2018 | 68 min | 0.92 | 68 min | 0.92 |
| LaCreek Electric Assn, Inc | - | - | - | - | - |
| 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 87% of South Dakota's customers in 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,164 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. Oglala Lakota County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Oglala Lakota 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/oglala-lakota-county