County annual report · FIPS 08017
2021 Cheyenne County, CO Power Outage Report
In 2021, customers in Cheyenne County, CO went without power for an average of 6.4 hours, a total of 9,078 customer-hours (Colorado average 2.8 hours). That ranks 11th worst of 52 Colorado counties and 1099th of 2,974 nationally.
Compared with CO, the US and 2020
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Cheyenne County, 2021
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 7, 2021 06:00 | April 7, 2021 13:45 | 7h 45m | 1,368 | 1,221 |
| 2 | October 27, 2021 03:00 | October 27, 2021 14:30 | 11h 30m | 574 | 782 |
| 3 | June 5, 2021 13:45 | August 24, 2021 13:45 | 80d | 509 | 2,705 |
| 4 | May 5, 2021 12:45 | June 5, 2021 12:45 | 31d | 315 | 1,195 |
| 5 | August 26, 2021 04:15 | August 26, 2021 05:45 | 1h 30m | 195 | 293 |
| 6 | December 14, 2021 21:00 | December 15, 2021 00:45 | 3h 45m | 134 | 70 |
| 7 | October 6, 2021 20:45 | October 6, 2021 21:00 | 15m | 133 | 33 |
| 8 | February 12, 2021 19:15 | February 12, 2021 21:00 | 1h 45m | 118 | 207 |
| 9 | December 15, 2021 16:15 | December 16, 2021 14:45 | 22h 30m | 71 | 302 |
| 10 | April 13, 2021 21:15 | April 13, 2021 21:30 | 15m | 70 | 18 |
Outage episodes by size in 2021: 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 Cheyenne County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Wheatland Electric Coop, Inc | 2021 | 3.3 hrs | 1.24 | 1.5 hrs | 0.97 |
| Southeast Colorado Power Assn | 2021 | 12.0 hrs | - | 9.4 hrs | - |
| K C Electric Association | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 83% of Colorado's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,412 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. Cheyenne County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Cheyenne County, CO annual power outage report, 2021, 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/2021/colorado/cheyenne-county