County annual report · FIPS 46102
2023 Oglala Lakota County, SD Power Outage Report
In 2023, customers in Oglala Lakota County, SD went without power for an average of 0.4 hours, a total of 1,829 customer-hours (South Dakota average 2.3 hours). That ranks 53rd worst of 61 South Dakota counties and 2834th of 2,977 nationally.
Compared with SD, the US and 2022
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Oglala Lakota County, 2023
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 22, 2023 16:30 | November 22, 2023 18:15 | 1h 45m | 547 | 683 |
| 2 | April 20, 2023 22:15 | April 20, 2023 23:00 | 45m | 253 | 127 |
| 3 | August 12, 2023 22:00 | August 13, 2023 08:15 | 10h 15m | 69 | 424 |
| 4 | August 25, 2023 14:30 | August 25, 2023 15:30 | 1h | 33 | 33 |
| 5 | June 20, 2023 00:45 | June 20, 2023 02:15 | 1h 30m | 27 | 41 |
| 6 | September 14, 2023 15:15 | September 14, 2023 19:30 | 4h 15m | 19 | 81 |
| 7 | September 13, 2023 15:45 | September 13, 2023 20:00 | 4h 15m | 18 | 62 |
| 8 | May 3, 2023 16:30 | May 3, 2023 19:00 | 2h 30m | 12 | 30 |
| 9 | July 14, 2023 11:30 | July 14, 2023 13:15 | 1h 45m | 9 | 16 |
| 10 | July 25, 2023 05:45 | July 25, 2023 12:15 | 6h 30m | 9 | 56 |
Outage episodes by size in 2023: 2 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 2023, 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 | 2023 | 70 min | 0.60 | 70 min | 0.60 |
| Black Hills Electric Coop, Inc | 2023 | 2.7 hrs | 0.78 | 88 min | 0.62 |
| West River Electric Assn Inc | 2023 | 38 min | 0.46 | 38 min | 0.46 |
| LaCreek 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 2023; 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, 2023, 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/2023/south-dakota/oglala-lakota-county