County annual report · FIPS 46137
2020 Ziebach County, SD Power Outage Report
In 2020, customers in Ziebach County, SD went without power for an average of 0.6 hours, a total of 847 customer-hours (South Dakota average 4.6 hours). That ranks 52nd worst of 62 South Dakota counties and 2792nd 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 Ziebach 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 | January 27, 2020 18:00 | January 27, 2020 18:15 | 15m | 31 | 8 |
| 2 | January 30, 2020 16:30 | January 30, 2020 20:00 | 3h 30m | 31 | 109 |
| 3 | August 30, 2020 11:45 | August 30, 2020 15:15 | 3h 30m | 31 | 109 |
| 4 | July 8, 2020 17:15 | July 10, 2020 20:30 | 2d 3h | 30 | 189 |
| 5 | February 28, 2020 17:15 | February 28, 2020 17:45 | 30m | 3 | 2 |
| 6 | November 3, 2020 17:15 | November 9, 2020 14:30 | 5d 21h | 3 | 421 |
| 7 | March 17, 2020 16:45 | March 17, 2020 17:00 | 15m | 1 | 0 |
| 8 | May 12, 2020 21:00 | May 12, 2020 22:00 | 1h | 1 | 1 |
| 9 | June 29, 2020 01:00 | June 29, 2020 04:45 | 3h 45m | 1 | 4 |
| 10 | July 6, 2020 05:15 | July 6, 2020 08:00 | 2h 45m | 1 | 3 |
Outage episodes by size in 2020: 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 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 |
|---|---|---|---|---|---|
| West River Electric Assn Inc | 2020 | 28 min | 0.36 | 28 min | 0.36 |
| 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 79% of South Dakota's customers in 2020; 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, 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/ziebach-county