County annual report · FIPS 08117
2021 Summit County, CO Power Outage Report
In 2021, customers in Summit County, CO went without power for an average of 6.0 hours, a total of 96K customer-hours (Colorado average 2.8 hours). That ranks 13th worst of 52 Colorado counties and 1154th 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 Summit 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 | September 2, 2021 14:30 | September 2, 2021 17:45 | 3h 15m | 4,653 | 4,305 |
| 2 | May 19, 2021 20:00 | May 19, 2021 21:30 | 1h 30m | 3,424 | 4,129 |
| 3 | May 13, 2021 14:45 | May 13, 2021 22:45 | 8h | 2,870 | 943 |
| 4 | December 28, 2021 07:30 | December 28, 2021 07:45 | 15m | 2,180 | 545 |
| 5 | December 9, 2021 03:15 | December 9, 2021 15:45 | 12h 30m | 1,992 | 12K |
| 6 | September 19, 2021 16:45 | September 19, 2021 22:00 | 5h 15m | 1,729 | 2,494 |
| 7 | August 16, 2021 00:45 | August 16, 2021 02:45 | 2h | 1,589 | 1,590 |
| 8 | October 29, 2021 21:45 | October 30, 2021 09:00 | 11h 15m | 1,444 | 2,190 |
| 9 | December 24, 2021 16:00 | December 25, 2021 02:15 | 10h 15m | 1,112 | 5,568 |
| 10 | December 11, 2021 20:30 | December 11, 2021 23:30 | 3h | 1,110 | 3,328 |
Outage episodes by size in 2021: 61 reached 100+ customers, 12 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 Summit 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 |
| Mountain Parks Electric, Inc | 2021 | 2.2 hrs | 1.47 | 1.9 hrs | 1.21 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 ÷ 16,131 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. Summit County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Summit 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/summit-county