County annual report · FIPS 56003
2017 Big Horn County, WY Power Outage Report
In 2017, customers in Big Horn County, WY went without power for an average of 0.3 hours, a total of 1,235 customer-hours (Wyoming average 0.9 hours). That ranks 17th worst of 19 Wyoming counties and 2401st 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 Big Horn 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 23, 2017 03:00 | October 23, 2017 03:30 | 30m | 1,472 | 736 |
| 2 | September 19, 2017 11:15 | September 19, 2017 21:15 | 10h | 302 | 140 |
| 3 | December 4, 2017 00:00 | December 4, 2017 02:45 | 2h 45m | 60 | 67 |
| 4 | September 14, 2017 01:15 | September 14, 2017 03:00 | 1h 45m | 57 | 58 |
| 5 | August 14, 2017 17:45 | August 14, 2017 20:00 | 2h 15m | 24 | 52 |
| 6 | September 28, 2017 17:30 | September 28, 2017 18:45 | 1h 15m | 21 | 26 |
| 7 | December 14, 2017 14:30 | December 14, 2017 15:15 | 45m | 19 | 14 |
| 8 | August 16, 2017 16:30 | August 16, 2017 18:30 | 2h | 12 | 24 |
| 9 | September 19, 2017 01:45 | September 19, 2017 03:30 | 1h 45m | 10 | 10 |
| 10 | August 8, 2017 20:15 | August 9, 2017 01:15 | 5h | 7 | 7 |
Outage episodes by size in 2017: 2 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 Big Horn 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 |
| Powder River Energy Corp | 2017 | 4.9 hrs | 2.23 | 4.9 hrs | 2.23 |
| Big Horn Rural Electric Co | 2017 | 3.1 hrs | 1.11 | - | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| High Plains Power Inc | - | - | - | - | - |
| Garland Light & Power Company | - | - | - | - | - |
| City of Deaver - (WY) | - | - | - | - | - |
| Town of Basin - (WY) | - | - | - | - | - |
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 ÷ 3,930 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. Big Horn County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Big Horn 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/big-horn-county