County annual report · FIPS 56033
2017 Sheridan County, WY Power Outage Report
In 2017, customers in Sheridan County, WY went without power for an average of 1.4 hours, a total of 25K customer-hours (Wyoming average 0.9 hours). That ranks 8th worst of 19 Wyoming counties and 1844th 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 Sheridan 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 | April 25, 2017 09:15 | April 26, 2017 05:15 | 20h | 808 | 4,149 |
| 2 | February 10, 2017 07:00 | February 10, 2017 14:15 | 7h 15m | 780 | 1,825 |
| 3 | October 2, 2017 14:30 | October 6, 2017 17:15 | 4d 2h | 534 | 4,292 |
| 4 | April 2, 2017 11:00 | April 10, 2017 19:45 | 8d 8h | 407 | 1,905 |
| 5 | April 17, 2017 12:15 | April 22, 2017 11:15 | 4d 23h | 367 | 1,527 |
| 6 | March 7, 2017 07:00 | March 12, 2017 06:00 | 4d 23h | 355 | 1,510 |
| 7 | May 8, 2017 03:00 | May 8, 2017 09:45 | 6h 45m | 335 | 1,135 |
| 8 | July 16, 2017 20:45 | July 17, 2017 13:15 | 16h 30m | 324 | 336 |
| 9 | April 28, 2017 06:15 | April 29, 2017 13:15 | 1d 7h | 277 | 558 |
| 10 | June 30, 2017 22:00 | July 1, 2017 00:45 | 2h 45m | 262 | 219 |
Outage episodes by size in 2017: 15 reached 100+ customers, 0 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 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 |
|---|---|---|---|---|---|
| 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 | - | - |
| 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 n/a of Wyoming's customers in 2017; 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, 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/sheridan-county