County annual report · FIPS 56029
2021 Park County, WY Power Outage Report
In 2021, customers in Park County, WY went without power for an average of 1.2 hours, a total of 16K customer-hours (Wyoming average 2.2 hours). That ranks 16th worst of 20 Wyoming counties and 2600th of 2,974 nationally.
Compared with WY, the US and 2020
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Park County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 2, 2021 21:00 | February 2, 2021 23:00 | 2h | 3,222 | 808 |
| 2 | August 18, 2021 12:30 | August 18, 2021 18:00 | 5h 30m | 942 | 816 |
| 3 | June 10, 2021 23:30 | June 12, 2021 01:30 | 1d 2h | 669 | 909 |
| 4 | November 14, 2021 07:15 | November 14, 2021 12:00 | 4h 45m | 660 | 3,135 |
| 5 | October 24, 2021 06:15 | October 24, 2021 11:15 | 5h | 659 | 2,637 |
| 6 | October 27, 2021 20:45 | October 27, 2021 23:45 | 3h | 659 | 332 |
| 7 | July 28, 2021 13:45 | July 28, 2021 14:15 | 30m | 647 | 324 |
| 8 | May 4, 2021 14:15 | May 4, 2021 14:45 | 30m | 438 | 219 |
| 9 | July 9, 2021 23:30 | July 10, 2021 01:30 | 2h | 350 | 187 |
| 10 | October 13, 2021 12:15 | October 13, 2021 21:00 | 8h 45m | 248 | 138 |
Outage episodes by size in 2021: 15 reached 100+ customers, 1 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 Park County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2021 | 4.3 hrs | 1.86 | 2.0 hrs | 1.19 |
| NorthWestern Energy LLC - (MT) | 2021 | 2.5 hrs | 1.37 | 2.1 hrs | 1.18 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| High Plains Power Inc | - | - | - | - | - |
| Beartooth Electric Coop, Inc | - | - | - | - | - |
| Garland Light & Power Company | - | - | - | - | - |
| City of Cody | - | - | - | - | - |
| City of Powell - (WY) | - | - | - | - | - |
| Willwood Light & Power Company | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 14,005 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. Park County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Park County, WY annual power outage report, 2021, 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/2021/wyoming/park-county