County annual report · FIPS 46137
2019 Ziebach County, SD Power Outage Report
In 2019, customers in Ziebach County, SD went without power for an average of 0.3 hours, a total of 388 customer-hours (South Dakota average 3.8 hours). That ranks 41st worst of 58 South Dakota counties and 2748th of 2,945 nationally.
Compared with SD, the US and 2018
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Ziebach County, 2019
The 9 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 8, 2019 16:00 | January 8, 2019 20:45 | 4h 45m | 32 | 152 |
| 2 | January 13, 2019 16:30 | January 13, 2019 21:15 | 4h 45m | 32 | 114 |
| 3 | May 13, 2019 14:00 | May 13, 2019 15:15 | 1h 15m | 31 | 31 |
| 4 | April 11, 2019 22:15 | April 11, 2019 23:00 | 45m | 30 | 23 |
| 5 | June 27, 2019 10:15 | June 27, 2019 15:45 | 5h 30m | 4 | 16 |
| 6 | September 5, 2019 04:15 | September 5, 2019 13:30 | 9h 15m | 3 | 28 |
| 7 | July 1, 2019 22:45 | July 2, 2019 13:45 | 15h | 1 | 15 |
| 8 | July 2, 2019 19:15 | July 3, 2019 00:30 | 5h 15m | 1 | 5 |
| 9 | July 19, 2019 11:30 | July 19, 2019 16:00 | 4h 30m | 1 | 5 |
Outage episodes by size in 2019: 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 2019, 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Grand Electric Coop, Inc | - | - | - | - | - |
| West River Electric Assn 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 87% of South Dakota's customers in 2019; 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, 2019, 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/). https://massoutage.com/reports/2019/south-dakota/ziebach-county