County annual report · FIPS 46013
2020 Brown County, SD Power Outage Report
In 2020, customers in Brown County, SD went without power for an average of 1.7 hours, a total of 32K customer-hours (South Dakota average 4.6 hours). That ranks 43rd worst of 62 South Dakota counties and 2383rd of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Brown County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 16, 2020 18:45 | September 16, 2020 20:45 | 2h | 3,190 | 5,708 |
| 2 | May 1, 2020 17:30 | May 2, 2020 02:15 | 8h 45m | 2,362 | 4,833 |
| 3 | June 15, 2020 12:15 | June 15, 2020 18:45 | 6h 30m | 2,158 | 3,025 |
| 4 | October 14, 2020 10:00 | October 14, 2020 15:45 | 5h 45m | 1,621 | 5,099 |
| 5 | July 3, 2020 17:15 | July 3, 2020 20:15 | 3h | 995 | 1,742 |
| 6 | June 5, 2020 16:30 | June 5, 2020 18:00 | 1h 30m | 834 | 245 |
| 7 | September 30, 2020 21:15 | October 1, 2020 01:15 | 4h | 748 | 1,048 |
| 8 | July 5, 2020 05:45 | July 6, 2020 20:30 | 1d 14h | 473 | 1,328 |
| 9 | July 26, 2020 06:30 | July 26, 2020 11:00 | 4h 30m | 313 | 323 |
| 10 | August 24, 2020 23:00 | August 25, 2020 01:45 | 2h 45m | 312 | 780 |
Outage episodes by size in 2020: 19 reached 100+ customers, 4 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 Brown County reported on EIA Form 861 for 2020, 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) | 2020 | 2.6 hrs | 1.54 | 1.9 hrs | 1.28 |
| Northern Electric Coop, Inc | 2020 | 1.7 hrs | 0.62 | 1.6 hrs | 0.56 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Lake Region Electric Assn, Inc - (SD) | - | - | - | - | - |
| City of Groton - (SD) | - | - | - | - | - |
| City of Hecla | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 79% of South Dakota's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 19,238 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. Brown County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Brown County, SD annual power outage report, 2020, 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/2020/south-dakota/brown-county