County annual report · FIPS 56025
2019 Natrona County, WY Power Outage Report
In 2019, customers in Natrona County, WY went without power for an average of 1.3 hours, a total of 61K customer-hours (Wyoming average 1.3 hours). That ranks 13th worst of 22 Wyoming counties and 2393rd of 2,945 nationally.
Compared with WY, the US and 2018
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Natrona County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 3, 2019 11:30 | April 3, 2019 22:15 | 10h 45m | 4,970 | 1,293 |
| 2 | July 30, 2019 07:15 | July 31, 2019 05:45 | 22h 30m | 2,260 | 5,750 |
| 3 | January 31, 2019 18:45 | February 1, 2019 02:30 | 7h 45m | 1,101 | 574 |
| 4 | February 28, 2019 01:45 | February 28, 2019 06:30 | 4h 45m | 1,033 | 2,055 |
| 5 | May 13, 2019 12:00 | May 13, 2019 23:15 | 11h 15m | 962 | 255 |
| 6 | June 16, 2019 21:30 | June 17, 2019 09:00 | 11h 30m | 939 | 1,887 |
| 7 | September 8, 2019 15:15 | September 9, 2019 11:00 | 19h 45m | 925 | 3,168 |
| 8 | March 29, 2019 11:00 | March 30, 2019 00:30 | 13h 30m | 888 | 3,177 |
| 9 | February 7, 2019 11:00 | February 8, 2019 01:15 | 14h 15m | 867 | 3,473 |
| 10 | October 20, 2019 14:45 | October 21, 2019 08:15 | 17h 30m | 690 | 2,652 |
Outage episodes by size in 2019: 43 reached 100+ customers, 4 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 Natrona 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 |
|---|---|---|---|---|---|
| PacifiCorp | 2018 | 3.2 hrs | 1.62 | 2.0 hrs | 1.25 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| High Plains Power 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 68% of Wyoming's customers in 2019; 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, 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2019/wyoming/natrona-county