County annual report · FIPS 46137
2024 Ziebach County, SD Power Outage Report
In 2024, customers in Ziebach County, SD went without power for an average of 7.2 hours, a total of 9,938 customer-hours (South Dakota average 2.3 hours). That ranks 7th worst of 65 South Dakota counties and 1213th of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Ziebach County, 2024
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 28, 2024 03:15 | June 28, 2024 07:45 | 4h 30m | 1,103 | 1,290 |
| 2 | July 14, 2024 05:00 | July 15, 2024 17:15 | 1d 12h | 542 | 2,798 |
| 3 | June 23, 2024 01:45 | June 23, 2024 03:30 | 1h 45m | 170 | 298 |
| 4 | September 14, 2024 23:15 | September 15, 2024 01:00 | 1h 45m | 107 | 161 |
| 5 | August 24, 2024 23:45 | August 26, 2024 14:00 | 1d 14h | 104 | 3,875 |
| 6 | August 30, 2024 01:00 | August 30, 2024 02:30 | 1h 30m | 64 | 96 |
| 7 | October 17, 2024 15:30 | October 17, 2024 18:00 | 2h 30m | 44 | 98 |
| 8 | March 19, 2024 15:45 | March 19, 2024 22:15 | 6h 30m | 34 | 221 |
| 9 | March 27, 2024 05:15 | March 27, 2024 07:45 | 2h 30m | 34 | 85 |
| 10 | July 9, 2024 13:15 | July 9, 2024 19:30 | 6h 15m | 33 | 206 |
Outage episodes by size in 2024: 5 reached 100+ customers, 1 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 Ziebach County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| West River Electric Assn Inc | 2024 | 44 min | 0.53 | 44 min | 0.53 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
| Moreau-Grand 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 n/a of South Dakota's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,374 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. Ziebach County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Ziebach County, SD annual power outage report, 2024, 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/2024/south-dakota/ziebach-county