County annual report · FIPS 46051
2022 Grant County, SD Power Outage Report
In 2022, customers in Grant County, SD went without power for an average of 42.9 hours, a total of 134K customer-hours (South Dakota average 6.9 hours). That ranks 7th worst of 63 South Dakota counties and 97th of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Grant County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 19, 2022 08:45 | July 21, 2022 17:45 | 2d 9h | 1,495 | 85K |
| 2 | May 30, 2022 20:00 | May 31, 2022 04:15 | 8h 15m | 1,377 | 3,463 |
| 3 | May 12, 2022 23:15 | May 14, 2022 19:30 | 1d 20h | 752 | 6,947 |
| 4 | January 30, 2022 00:30 | January 30, 2022 00:45 | 15m | 577 | 144 |
| 5 | January 30, 2022 03:00 | January 30, 2022 03:15 | 15m | 577 | 144 |
| 6 | January 30, 2022 04:30 | January 30, 2022 04:45 | 15m | 577 | 144 |
| 7 | January 30, 2022 05:30 | January 30, 2022 06:15 | 45m | 577 | 289 |
| 8 | January 30, 2022 07:30 | February 1, 2022 12:00 | 2d 4h | 577 | 30K |
| 9 | June 21, 2022 03:45 | June 21, 2022 20:30 | 16h 45m | 490 | 5,620 |
| 10 | December 14, 2022 10:15 | December 14, 2022 10:30 | 15m | 192 | 48 |
Outage episodes by size in 2022: 11 reached 100+ customers, 2 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 Grant County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2022 | 6.2 hrs | 2.20 | 2.1 hrs | 1.80 |
| H-D Electric Coop Inc | 2018 | 2.6 hrs | 1.52 | 1.6 hrs | 1.14 |
| Whetstone Valley Elec Coop Inc | 2018 | 73 min | 0.64 | 42 min | 0.43 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Codington-Clark Elec Coop, Inc | - | - | - | - | - |
| City of Big Stone City - (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 89% of South Dakota's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,124 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. Grant County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Grant County, SD annual power outage report, 2022, 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/2022/south-dakota/grant-county