County annual report · FIPS 56025
2017 Natrona County, WY Power Outage Report
In 2017, customers in Natrona County, WY went without power for an average of 0.5 hours, a total of 22K customer-hours (Wyoming average 0.9 hours). That ranks 13th worst of 19 Wyoming counties and 2314th of 2,786 nationally.
Compared with WY, the US
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Natrona County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 20, 2017 15:45 | October 20, 2017 20:30 | 4h 45m | 1,802 | 460 |
| 2 | August 31, 2017 00:45 | August 31, 2017 05:30 | 4h 45m | 1,120 | 2,292 |
| 3 | August 5, 2017 04:45 | August 5, 2017 08:15 | 3h 30m | 626 | 1,580 |
| 4 | November 29, 2017 11:45 | November 29, 2017 22:30 | 10h 45m | 407 | 1,547 |
| 5 | October 9, 2017 00:45 | October 10, 2017 09:00 | 1d 8h | 406 | 1,862 |
| 6 | August 10, 2017 14:45 | August 10, 2017 18:00 | 3h 15m | 401 | 554 |
| 7 | August 20, 2017 14:30 | August 20, 2017 17:45 | 3h 15m | 395 | 451 |
| 8 | August 18, 2017 22:00 | August 19, 2017 02:15 | 4h 15m | 393 | 1,039 |
| 9 | September 5, 2017 07:15 | September 5, 2017 22:00 | 14h 45m | 344 | 1,304 |
| 10 | August 16, 2017 20:00 | August 16, 2017 21:00 | 1h | 323 | 82 |
Outage episodes by size in 2017: 22 reached 100+ customers, 2 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 2017, 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 | 2017 | 5.2 hrs | 2.01 | 2.4 hrs | 1.43 |
| 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 n/a of Wyoming's customers in 2017; 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, 2017, 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/2017/wyoming/natrona-county