County annual report · FIPS 46137
2023 Ziebach County, SD Power Outage Report
In 2023, customers in Ziebach County, SD went without power for an average of 0.3 hours, a total of 407 customer-hours (South Dakota average 2.3 hours). That ranks 54th worst of 61 South Dakota counties and 2861st of 2,977 nationally.
Compared with SD, the US and 2022
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Ziebach County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 18, 2023 17:30 | October 18, 2023 19:00 | 1h 30m | 32 | 48 |
| 2 | June 1, 2023 15:15 | June 1, 2023 18:30 | 3h 15m | 30 | 98 |
| 3 | November 29, 2023 15:45 | November 30, 2023 00:00 | 8h 15m | 23 | 190 |
| 4 | January 13, 2023 16:45 | January 13, 2023 22:45 | 6h | 3 | 17 |
| 5 | January 14, 2023 02:00 | January 14, 2023 03:30 | 1h 30m | 3 | 5 |
| 6 | January 25, 2023 04:15 | January 25, 2023 15:15 | 11h | 3 | 33 |
| 7 | August 31, 2023 10:30 | August 31, 2023 11:30 | 1h | 3 | 3 |
| 8 | January 23, 2023 17:45 | January 23, 2023 21:45 | 4h | 1 | 4 |
| 9 | March 1, 2023 19:00 | March 1, 2023 20:30 | 1h 30m | 1 | 2 |
| 10 | April 29, 2023 00:30 | April 29, 2023 01:45 | 1h 15m | 1 | 1 |
Outage episodes by size in 2023: 0 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 Ziebach County reported on EIA Form 861 for 2023, 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 | 2023 | 38 min | 0.46 | 38 min | 0.46 |
| 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 2023; 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, 2023, 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/2023/south-dakota/ziebach-county