County annual report · FIPS 56039
2023 Teton County, WY Power Outage Report
In 2023, customers in Teton County, WY went without power for an average of 0.4 hours, a total of 8,124 customer-hours (Wyoming average 2.0 hours). That ranks 20th worst of 20 Wyoming counties and 2835th of 2,977 nationally.
Compared with WY, the US and 2022
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Teton 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 | December 8, 2023 20:30 | December 8, 2023 23:45 | 3h 15m | 204 | 600 |
| 2 | October 14, 2023 00:45 | October 16, 2023 13:15 | 2d 12h | 170 | 1,046 |
| 3 | November 24, 2023 20:30 | November 25, 2023 03:00 | 6h 30m | 129 | 674 |
| 4 | November 16, 2023 20:45 | November 17, 2023 15:45 | 19h | 100 | 1,900 |
| 5 | November 14, 2023 01:30 | November 14, 2023 05:45 | 4h 15m | 85 | 350 |
| 6 | December 2, 2023 23:00 | December 3, 2023 00:00 | 1h | 80 | 80 |
| 7 | October 31, 2023 15:30 | October 31, 2023 22:00 | 6h 30m | 75 | 488 |
| 8 | November 17, 2023 22:15 | November 17, 2023 23:00 | 45m | 64 | 48 |
| 9 | June 18, 2023 00:00 | June 18, 2023 01:45 | 1h 45m | 63 | 110 |
| 10 | July 2, 2023 00:15 | July 2, 2023 04:30 | 4h 15m | 61 | 259 |
Outage episodes by size in 2023: 4 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 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 |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2023 | 1.7 hrs | 0.93 | 1.7 hrs | 0.93 |
| High Plains Power Inc | 2023 | 5.4 hrs | - | 5.4 hrs | - |
| Fall River Rural Elec Coop Inc | 2023 | 12 min | 0.11 | 11 min | 0.11 |
| 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 n/a of Wyoming's customers in 2023; 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, 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/wyoming/teton-county