County annual report · FIPS 56033
2022 Sheridan County, WY Power Outage Report
In 2022, customers in Sheridan County, WY went without power for an average of 3.7 hours, a total of 66K customer-hours (Wyoming average 2.4 hours). That ranks 7th worst of 20 Wyoming counties and 1728th of 2,976 nationally.
Compared with WY, the US and 2021
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Sheridan County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 11, 2022 10:30 | September 11, 2022 14:00 | 3h 30m | 4,930 | 7,571 |
| 2 | April 23, 2022 03:30 | April 23, 2022 23:45 | 20h 15m | 3,262 | 8,055 |
| 3 | October 6, 2022 05:00 | October 6, 2022 13:00 | 8h | 2,109 | 7,600 |
| 4 | December 27, 2022 14:15 | December 27, 2022 21:00 | 6h 45m | 1,102 | 309 |
| 5 | July 19, 2022 01:30 | July 19, 2022 13:15 | 11h 45m | 1,094 | 8,288 |
| 6 | December 12, 2022 18:45 | December 12, 2022 22:15 | 3h 30m | 918 | 729 |
| 7 | June 14, 2022 18:45 | June 14, 2022 19:15 | 30m | 575 | 288 |
| 8 | June 13, 2022 06:45 | June 13, 2022 13:15 | 6h 30m | 574 | 3,016 |
| 9 | June 13, 2022 17:30 | June 13, 2022 23:00 | 5h 30m | 572 | 2,715 |
| 10 | January 26, 2022 02:45 | January 26, 2022 14:15 | 11h 30m | 568 | 6,248 |
Outage episodes by size in 2022: 33 reached 100+ customers, 5 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 Sheridan County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Powder River Energy Corp | 2022 | 5.1 hrs | 2.30 | 4.4 hrs | 2.18 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Big Horn County Elec Coop, 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 71% of Wyoming's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 17,618 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. Sheridan County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sheridan County, WY annual power outage report, 2022, 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/2022/wyoming/sheridan-county