County annual report · FIPS 08059
2019 Jefferson County, CO Power Outage Report
In 2019, customers in Jefferson County, CO went without power for an average of 4.4 hours, a total of 1.2M customer-hours (Colorado average 3.3 hours). That ranks 17th worst of 55 Colorado counties and 1211th of 2,945 nationally.
Compared with CO, the US and 2018
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Jefferson County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 15, 2019 20:30 | February 16, 2019 03:15 | 6h 45m | 156,331 | 73K |
| 2 | February 19, 2019 17:15 | April 7, 2019 10:00 | 46d 16h | 33,384 | 626K |
| 3 | January 10, 2019 14:15 | January 12, 2019 10:45 | 1d 20h | 7,816 | 21K |
| 4 | August 5, 2019 12:15 | August 8, 2019 23:30 | 3d 11h | 7,142 | 11K |
| 5 | January 3, 2019 16:45 | January 10, 2019 13:15 | 6d 20h | 5,608 | 12K |
| 6 | May 20, 2019 17:00 | May 25, 2019 02:00 | 4d 9h | 5,303 | 43K |
| 7 | May 10, 2019 13:45 | May 13, 2019 08:00 | 2d 18h | 4,618 | 11K |
| 8 | September 10, 2019 13:15 | September 16, 2019 13:45 | 6d | 4,617 | 16K |
| 9 | July 20, 2019 14:30 | July 21, 2019 21:15 | 1d 6h | 4,513 | 13K |
| 10 | May 15, 2019 14:30 | May 17, 2019 10:45 | 1d 20h | 4,228 | 7,046 |
Outage episodes by size in 2019: 133 reached 100+ customers, 41 reached 1,000+ customers, 2 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 2019, 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 | 2018 | 1.9 hrs | 1.02 | 1.6 hrs | 0.98 |
| CORE Electric Cooperative | 2018 | 89 min | 0.66 | 76 min | 0.59 |
| United Power, Inc | 2018 | 70 min | 0.75 | - | - |
| 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 2019; 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, 2019, 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/2019/colorado/jefferson-county