County annual report · FIPS 46015
2023 Brule County, SD Power Outage Report
In 2023, customers in Brule County, SD went without power for an average of 5.4 hours, a total of 15K customer-hours (South Dakota average 2.3 hours). That ranks 9th worst of 61 South Dakota counties and 1398th 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 Brule 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 | May 11, 2023 10:15 | May 11, 2023 13:45 | 3h 30m | 1,734 | 4,244 |
| 2 | July 26, 2023 03:30 | July 26, 2023 06:15 | 2h 45m | 1,734 | 4,336 |
| 3 | November 14, 2023 05:15 | November 14, 2023 07:30 | 2h 15m | 1,608 | 2,818 |
| 4 | February 15, 2023 03:45 | February 15, 2023 06:15 | 2h 30m | 806 | 2,015 |
| 5 | August 23, 2023 05:45 | August 23, 2023 14:15 | 8h 30m | 285 | 498 |
| 6 | March 7, 2023 04:15 | March 7, 2023 06:30 | 2h 15m | 139 | 118 |
| 7 | August 22, 2023 22:45 | August 23, 2023 00:30 | 1h 45m | 28 | 49 |
| 8 | October 27, 2023 01:45 | October 27, 2023 04:00 | 2h 15m | 27 | 55 |
| 9 | August 26, 2023 19:00 | August 26, 2023 22:15 | 3h 15m | 19 | 62 |
| 10 | December 17, 2023 04:00 | December 18, 2023 07:15 | 1d 3h | 19 | 500 |
Outage episodes by size in 2023: 6 reached 100+ customers, 3 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 Brule 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2023 | 1.9 hrs | 1.37 | 74 min | 1.03 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Central Electric Coop, Inc - (SD) | - | - | - | - | - |
| Charles Mix 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 ÷ 2,837 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. Brule County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Brule 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/brule-county