County annual report · FIPS 46069
2021 Hyde County, SD Power Outage Report
In 2021, customers in Hyde County, SD went without power for an average of 4.6 hours, a total of 2,815 customer-hours (South Dakota average 3.4 hours). That ranks 15th worst of 61 South Dakota counties and 1424th 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 Hyde 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 | September 14, 2021 16:00 | September 14, 2021 17:15 | 1h 15m | 646 | 751 |
| 2 | July 14, 2021 08:00 | July 14, 2021 12:00 | 4h | 333 | 1,259 |
| 3 | November 15, 2021 15:45 | November 16, 2021 00:00 | 8h 15m | 82 | 656 |
| 4 | May 4, 2021 15:45 | May 4, 2021 19:30 | 3h 45m | 8 | 21 |
| 5 | January 11, 2021 15:00 | January 12, 2021 02:30 | 11h 30m | 7 | 81 |
| 6 | September 30, 2021 10:30 | September 30, 2021 14:45 | 4h 15m | 6 | 21 |
| 7 | January 23, 2021 05:00 | January 23, 2021 07:00 | 2h | 1 | 2 |
| 8 | February 13, 2021 02:15 | February 13, 2021 03:45 | 1h 30m | 1 | 2 |
| 9 | March 20, 2021 22:00 | March 20, 2021 23:30 | 1h 30m | 1 | 2 |
| 10 | May 4, 2021 21:45 | May 4, 2021 22:00 | 15m | 1 | 0 |
Outage episodes by size in 2021: 2 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 Hyde 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2021 | 1.5 hrs | 0.95 | 81 min | 0.83 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Dakota Energy 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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 615 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. Hyde County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Hyde 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/hyde-county