County annual report · FIPS 56007
2018 Carbon County, WY Power Outage Report
In 2018, customers in Carbon County, WY went without power for an average of 0.9 hours, a total of 10K customer-hours (Wyoming average 1.2 hours). That ranks 10th worst of 21 Wyoming counties and 2331st of 2,798 nationally.
Compared with WY, the US and 2017
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Carbon County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 8, 2018 20:15 | August 8, 2018 22:30 | 2h 15m | 2,004 | 2,163 |
| 2 | May 12, 2018 05:45 | May 12, 2018 18:15 | 12h 30m | 572 | 2,309 |
| 3 | April 9, 2018 00:00 | April 9, 2018 02:00 | 2h | 536 | 994 |
| 4 | January 3, 2018 19:00 | January 3, 2018 21:30 | 2h 30m | 372 | 675 |
| 5 | October 4, 2018 14:00 | October 4, 2018 15:30 | 1h 30m | 208 | 161 |
| 6 | June 17, 2018 15:30 | June 17, 2018 17:45 | 2h 15m | 182 | 315 |
| 7 | May 27, 2018 21:00 | May 27, 2018 21:45 | 45m | 175 | 131 |
| 8 | November 3, 2018 03:45 | November 3, 2018 04:30 | 45m | 175 | 88 |
| 9 | May 11, 2018 00:15 | May 11, 2018 05:15 | 5h | 162 | 795 |
| 10 | April 13, 2018 19:30 | April 13, 2018 20:15 | 45m | 104 | 27 |
Outage episodes by size in 2018: 10 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 Carbon County reported on EIA Form 861 for 2018, 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 |
| Yampa Valley Electric Assn Inc | 2018 | 4.7 hrs | 2.43 | 4.1 hrs | 2.14 |
| Carbon Power & Light, Inc | 2018 | 7.6 hrs | 1.56 | 2.5 hrs | 1.34 |
| 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 62% of Wyoming's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 10,767 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. Carbon County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Carbon County, WY annual power outage report, 2018, 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/2018/wyoming/carbon-county