County annual report · FIPS 08059
2017 Jefferson County, CO Power Outage Report
In 2017, customers in Jefferson County, CO went without power for an average of 1.7 hours, a total of 471K customer-hours (Colorado average 1.5 hours). That ranks 21st worst of 48 Colorado counties and 1746th of 2,786 nationally.
Compared with CO, the US and 2016
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Jefferson 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 28, 2017 19:00 | April 29, 2017 06:00 | 11h | 16,439 | 4,640 |
| 2 | October 6, 2017 21:45 | October 11, 2017 10:45 | 4d 13h | 7,248 | 88K |
| 3 | June 26, 2017 06:30 | June 26, 2017 18:30 | 12h | 6,409 | 7,400 |
| 4 | December 29, 2017 08:45 | December 31, 2017 00:15 | 1d 15h | 5,430 | 9,643 |
| 5 | October 16, 2017 14:45 | October 17, 2017 07:45 | 17h | 4,660 | 1,612 |
| 6 | April 4, 2017 12:45 | April 4, 2017 22:30 | 9h 45m | 4,555 | 4,967 |
| 7 | June 20, 2017 14:15 | June 22, 2017 01:15 | 1d 11h | 4,485 | 11K |
| 8 | May 18, 2017 03:00 | May 20, 2017 05:45 | 2d 2h | 4,405 | 45K |
| 9 | August 27, 2017 23:00 | August 28, 2017 09:15 | 10h 15m | 4,162 | 4,155 |
| 10 | April 29, 2017 07:30 | April 30, 2017 09:15 | 1d 1h | 4,139 | 6,070 |
Outage episodes by size in 2017: 153 reached 100+ customers, 40 reached 1,000+ customers, 1 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 Jefferson 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 |
|---|---|---|---|---|---|
| Public Service Co of Colorado | 2017 | 1.8 hrs | 1.01 | 84 min | 0.92 |
| CORE Electric Cooperative | 2017 | 1.6 hrs | 0.84 | 70 min | 0.73 |
| United Power, Inc | 2017 | 2.0 hrs | 1.35 | - | - |
| 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 n/a of Colorado's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 278,207 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, CO 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/colorado/jefferson-county