County annual report · FIPS 46035
2020 Davison County, SD Power Outage Report
In 2020, customers in Davison County, SD went without power for an average of 3.8 hours, a total of 44K customer-hours (South Dakota average 4.6 hours). That ranks 31st worst of 62 South Dakota counties and 1669th 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 Davison 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 | June 9, 2020 11:15 | June 11, 2020 04:15 | 1d 17h | 3,951 | 26K |
| 2 | June 25, 2020 23:00 | June 26, 2020 01:45 | 2h 45m | 1,945 | 2,741 |
| 3 | August 31, 2020 13:00 | August 31, 2020 14:45 | 1h 45m | 1,168 | 1,237 |
| 4 | April 9, 2020 17:30 | April 9, 2020 19:15 | 1h 45m | 757 | 1,135 |
| 5 | July 5, 2020 22:15 | July 6, 2020 02:30 | 4h 15m | 554 | 1,247 |
| 6 | February 12, 2020 18:15 | February 12, 2020 19:15 | 1h | 436 | 164 |
| 7 | July 4, 2020 16:45 | July 5, 2020 17:45 | 1d 1h | 279 | 486 |
| 8 | September 6, 2020 16:00 | September 8, 2020 00:30 | 1d 8h | 278 | 959 |
| 9 | July 6, 2020 20:15 | July 6, 2020 21:15 | 1h | 277 | 277 |
| 10 | July 9, 2020 06:15 | July 9, 2020 13:00 | 6h 45m | 277 | 1,870 |
Outage episodes by size in 2020: 14 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 Davison 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Central Electric Coop, Inc - (SD) | - | - | - | - | - |
| Douglas Electric Coop, 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 79% of South Dakota's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 11,593 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. Davison County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Davison 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/davison-county