County annual report · FIPS 56033
2019 Sheridan County, WY Power Outage Report
In 2019, customers in Sheridan County, WY went without power for an average of 0.8 hours, a total of 15K customer-hours (Wyoming average 1.3 hours). That ranks 17th worst of 22 Wyoming counties and 2568th 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 Sheridan 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 | October 17, 2019 08:15 | October 17, 2019 13:15 | 5h | 1,126 | 1,621 |
| 2 | April 28, 2019 23:15 | April 29, 2019 03:00 | 3h 45m | 970 | 1,029 |
| 3 | September 13, 2019 01:15 | September 13, 2019 05:15 | 4h | 755 | 1,066 |
| 4 | October 11, 2019 01:15 | October 11, 2019 19:00 | 17h 45m | 468 | 1,937 |
| 5 | June 11, 2019 18:00 | June 11, 2019 22:30 | 4h 30m | 460 | 317 |
| 6 | June 17, 2019 04:30 | June 17, 2019 09:15 | 4h 45m | 233 | 305 |
| 7 | September 25, 2019 04:00 | September 25, 2019 10:15 | 6h 15m | 125 | 185 |
| 8 | March 29, 2019 18:45 | March 29, 2019 21:00 | 2h 15m | 123 | 274 |
| 9 | April 16, 2019 05:15 | April 16, 2019 05:45 | 30m | 99 | 27 |
| 10 | October 4, 2019 23:30 | October 5, 2019 06:00 | 6h 30m | 95 | 486 |
Outage episodes by size in 2019: 8 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 Sheridan 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 |
|---|---|---|---|---|---|
| Powder River Energy Corp | 2018 | 2.8 hrs | 1.52 | 2.8 hrs | 1.52 |
| 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 68% of Wyoming's customers in 2019; 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, 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/sheridan-county