County annual report · FIPS 46097
2021 Miner County, SD Power Outage Report
In 2021, customers in Miner County, SD went without power for an average of 1.7 hours, a total of 1,854 customer-hours (South Dakota average 3.4 hours). That ranks 43rd worst of 61 South Dakota counties and 2348th of 2,974 nationally.
Compared with SD, the US and 2020
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Miner County, 2021
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 8, 2021 15:30 | May 8, 2021 19:00 | 3h 30m | 352 | 445 |
| 2 | August 25, 2021 01:00 | August 25, 2021 04:15 | 3h 15m | 169 | 459 |
| 3 | September 13, 2021 18:00 | September 13, 2021 20:30 | 2h 30m | 152 | 284 |
| 4 | July 30, 2021 21:15 | July 30, 2021 23:00 | 1h 45m | 91 | 105 |
| 5 | August 5, 2021 17:15 | August 5, 2021 18:15 | 1h | 54 | 43 |
| 6 | October 13, 2021 13:45 | October 13, 2021 17:00 | 3h 15m | 42 | 96 |
| 7 | September 30, 2021 02:30 | September 30, 2021 06:45 | 4h 15m | 14 | 54 |
| 8 | March 22, 2021 17:00 | March 22, 2021 22:30 | 5h 30m | 11 | 11 |
| 9 | March 15, 2021 10:30 | March 15, 2021 16:45 | 6h 15m | 6 | 21 |
| 10 | March 15, 2021 19:15 | March 15, 2021 23:15 | 4h | 5 | 19 |
Outage episodes by size in 2021: 3 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 Miner County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Northern States Power Co - Minnesota | 2021 | 1.8 hrs | 0.82 | 77 min | 0.74 |
| Sioux Valley SW Elec Coop | 2021 | 1.8 hrs | 1.08 | 1.5 hrs | 0.93 |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Dakota Energy Coop Inc | - | - | - | - | - |
| Central Electric Coop, Inc - (SD) | - | - | - | - | - |
| City of Howard - (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 79% of South Dakota's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,069 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. Miner County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Miner County, SD annual power outage report, 2021, 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/2021/south-dakota/miner-county