County annual report · FIPS 46003
2019 Aurora County, SD Power Outage Report
In 2019, customers in Aurora County, SD went without power for an average of 0.6 hours, a total of 791 customer-hours (South Dakota average 3.8 hours). That ranks 37th worst of 58 South Dakota counties and 2654th of 2,945 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Aurora 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 | October 8, 2019 21:30 | October 8, 2019 22:45 | 1h 15m | 253 | 249 |
| 2 | September 5, 2019 20:00 | September 5, 2019 21:30 | 1h 30m | 63 | 80 |
| 3 | November 30, 2019 22:30 | December 1, 2019 08:30 | 10h | 29 | 104 |
| 4 | July 17, 2019 09:45 | July 17, 2019 16:15 | 6h 30m | 28 | 51 |
| 5 | December 1, 2019 10:45 | December 1, 2019 19:15 | 8h 30m | 21 | 50 |
| 6 | July 20, 2019 22:00 | July 20, 2019 22:30 | 30m | 14 | 7 |
| 7 | November 26, 2019 17:45 | November 26, 2019 18:45 | 1h | 9 | 9 |
| 8 | August 21, 2019 20:45 | August 21, 2019 21:00 | 15m | 6 | 2 |
| 9 | July 20, 2019 15:30 | July 20, 2019 18:00 | 2h 30m | 4 | 10 |
| 10 | July 20, 2019 19:45 | July 20, 2019 20:00 | 15m | 4 | 1 |
Outage episodes by size in 2019: 1 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 Aurora 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2018 | 1.9 hrs | 1.24 | 1.6 hrs | 1.13 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Central Electric Coop, Inc - (SD) | - | - | - | - | - |
| Douglas Electric Coop, Inc | - | - | - | - | - |
| City of Plankinton - (SD) | - | - | - | - | - |
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 ÷ 1,368 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. Aurora County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Aurora 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/aurora-county