County annual report · FIPS 56025
2023 Natrona County, WY Power Outage Report
In 2023, customers in Natrona County, WY went without power for an average of 2.0 hours, a total of 95K customer-hours (Wyoming average 2.0 hours). That ranks 11th worst of 20 Wyoming counties and 2296th 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 Natrona 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 | March 20, 2023 02:00 | March 20, 2023 12:30 | 10h 30m | 11,854 | 40K |
| 2 | June 16, 2023 09:00 | June 16, 2023 11:00 | 2h | 7,538 | 15K |
| 3 | November 25, 2023 18:00 | November 25, 2023 21:00 | 3h | 4,309 | 1,582 |
| 4 | November 21, 2023 09:45 | November 21, 2023 12:15 | 2h 30m | 4,308 | 4,316 |
| 5 | July 17, 2023 13:30 | July 17, 2023 20:00 | 6h 30m | 2,646 | 668 |
| 6 | July 12, 2023 10:45 | July 12, 2023 22:15 | 11h 30m | 2,201 | 5,452 |
| 7 | December 21, 2023 00:15 | December 21, 2023 10:45 | 10h 30m | 1,819 | 1,839 |
| 8 | April 29, 2023 20:45 | April 30, 2023 00:30 | 3h 45m | 1,800 | 1,363 |
| 9 | May 31, 2023 15:30 | May 31, 2023 15:45 | 15m | 1,485 | 371 |
| 10 | July 5, 2023 23:30 | July 6, 2023 02:00 | 2h 30m | 1,418 | 569 |
Outage episodes by size in 2023: 45 reached 100+ customers, 10 reached 1,000+ customers, 1 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 Natrona 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2023 | 8.2 hrs | 1.42 | 1.9 hrs | 0.99 |
| High Plains Power Inc | 2023 | 5.4 hrs | - | 5.4 hrs | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 ÷ 47,992 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. Natrona County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Natrona 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/natrona-county