County annual report · FIPS 08027
2021 Custer County, CO Power Outage Report
In 2021, customers in Custer County, CO went without power for an average of 0.4 hours, a total of 1,032 customer-hours (Colorado average 2.8 hours). That ranks 47th worst of 52 Colorado counties and 2843rd 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 Custer 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 | July 21, 2021 23:15 | July 22, 2021 04:15 | 5h | 228 | 558 |
| 2 | August 21, 2021 08:30 | August 21, 2021 12:30 | 4h | 81 | 304 |
| 3 | September 30, 2021 10:15 | September 30, 2021 11:00 | 45m | 64 | 48 |
| 4 | July 29, 2021 00:00 | July 29, 2021 02:30 | 2h 30m | 16 | 40 |
| 5 | December 27, 2021 15:15 | December 27, 2021 21:00 | 5h 45m | 14 | 42 |
| 6 | January 28, 2021 17:45 | January 28, 2021 18:00 | 15m | 13 | 3 |
| 7 | September 16, 2021 21:15 | September 16, 2021 21:30 | 15m | 9 | 2 |
| 8 | June 9, 2021 20:00 | June 9, 2021 21:00 | 1h | 7 | 7 |
| 9 | November 11, 2021 21:45 | November 11, 2021 22:15 | 30m | 6 | 3 |
| 10 | May 13, 2021 03:15 | May 13, 2021 04:30 | 1h 15m | 5 | 6 |
Outage episodes by size in 2021: 1 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 Custer 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 |
|---|---|---|---|---|---|
| Public Service Co of Colorado | 2021 | 3.0 hrs | 1.20 | 2.2 hrs | 1.00 |
| Black Hills Colorado Electric, LLC | 2021 | 5.5 hrs | 1.95 | 65 min | 1.09 |
| Sangre De Cristo Elec Assn Inc | 2018 | 2.2 hrs | 1.23 | 2.2 hrs | 1.23 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| San Isabel Electric Assn, 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 83% of Colorado's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,930 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. Custer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Custer 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/custer-county