County annual report · FIPS 46065
2020 Hughes County, SD Power Outage Report
In 2020, customers in Hughes County, SD went without power for an average of 0.6 hours, a total of 9,119 customer-hours (South Dakota average 4.6 hours). That ranks 50th worst of 62 South Dakota counties and 2784th 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 Hughes 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 | August 10, 2020 14:15 | August 11, 2020 00:15 | 10h | 428 | 4,280 |
| 2 | August 11, 2020 11:45 | August 11, 2020 13:00 | 1h 15m | 428 | 535 |
| 3 | August 13, 2020 14:00 | August 13, 2020 17:30 | 3h 30m | 428 | 1,498 |
| 4 | November 24, 2020 11:00 | November 24, 2020 13:00 | 2h | 371 | 649 |
| 5 | August 28, 2020 05:30 | August 28, 2020 11:15 | 5h 45m | 295 | 1,696 |
| 6 | March 19, 2020 22:30 | March 19, 2020 23:45 | 1h 15m | 265 | 331 |
| 7 | July 5, 2020 05:30 | July 5, 2020 16:30 | 11h | 19 | 101 |
| 8 | September 12, 2020 22:45 | September 13, 2020 02:00 | 3h 15m | 6 | 9 |
| 9 | November 14, 2020 18:45 | November 14, 2020 21:15 | 2h 30m | 2 | 4 |
| 10 | May 1, 2020 22:30 | May 2, 2020 00:30 | 2h | 1 | 2 |
Outage episodes by size in 2020: 6 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 Hughes 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 | - | - | - | - | - |
| Oahe Electric Coop Inc | - | - | - | - | - |
| City of Pierre - (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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 14,362 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. Hughes County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Hughes 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/hughes-county