County annual report · FIPS 56039
2022 Teton County, WY Power Outage Report
In 2022, customers in Teton County, WY went without power for an average of 0.1 hours, a total of 1,057 customer-hours (Wyoming average 2.4 hours). That ranks 20th worst of 20 Wyoming counties and 2936th of 2,976 nationally.
Compared with WY, the US and 2021
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Teton 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 | December 10, 2022 03:00 | December 10, 2022 08:00 | 5h | 110 | 549 |
| 2 | August 30, 2022 08:30 | August 30, 2022 10:45 | 2h 15m | 105 | 135 |
| 3 | May 17, 2022 14:15 | May 17, 2022 18:30 | 4h 15m | 35 | 141 |
| 4 | June 14, 2022 13:00 | June 14, 2022 13:45 | 45m | 23 | 17 |
| 5 | August 2, 2022 23:15 | August 3, 2022 01:15 | 2h | 23 | 35 |
| 6 | August 3, 2022 04:30 | August 3, 2022 06:15 | 1h 45m | 23 | 40 |
| 7 | October 2, 2022 21:15 | October 2, 2022 22:30 | 1h 15m | 20 | 20 |
| 8 | September 23, 2022 16:30 | September 23, 2022 21:30 | 5h | 13 | 27 |
| 9 | June 2, 2022 16:30 | June 2, 2022 19:45 | 3h 15m | 4 | 13 |
| 10 | June 17, 2022 15:15 | June 17, 2022 21:00 | 5h 45m | 4 | 19 |
Outage episodes by size in 2022: 2 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 Teton 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 |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2022 | 2.2 hrs | 1.14 | 2.0 hrs | 1.09 |
| Fall River Rural Elec Coop Inc | 2022 | 15 min | 0.13 | 13 min | 0.11 |
| High Plains Power Inc | - | - | - | - | - |
| Lower Valley Energy 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 71% of Wyoming's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 18,592 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. Teton County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Teton County, WY 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/wyoming/teton-county