County annual report · FIPS 08059
2018 Jefferson County, CO Power Outage Report
In 2018, customers in Jefferson County, CO went without power for an average of 2.3 hours, a total of 636K customer-hours (Colorado average 1.6 hours). That ranks 13th worst of 49 Colorado counties and 1729th of 2,798 nationally.
Compared with CO, the US and 2017
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Jefferson County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 31, 2018 14:00 | November 1, 2018 09:15 | 19h 15m | 9,952 | 13K |
| 2 | June 21, 2018 13:00 | June 21, 2018 16:15 | 3h 15m | 8,232 | 2,063 |
| 3 | July 7, 2018 22:00 | July 8, 2018 18:00 | 20h | 7,788 | 10K |
| 4 | November 3, 2018 05:00 | November 3, 2018 22:00 | 17h | 7,565 | 11K |
| 5 | April 17, 2018 13:45 | April 21, 2018 23:45 | 4d 10h | 5,899 | 66K |
| 6 | October 4, 2018 11:30 | October 9, 2018 06:15 | 4d 18h | 5,289 | 18K |
| 7 | November 23, 2018 15:30 | November 24, 2018 11:15 | 19h 45m | 5,130 | 15K |
| 8 | March 16, 2018 03:00 | March 17, 2018 01:15 | 22h 15m | 4,909 | 17K |
| 9 | June 5, 2018 23:30 | June 7, 2018 18:45 | 1d 19h | 4,435 | 7,691 |
| 10 | April 23, 2018 12:15 | April 25, 2018 23:30 | 2d 11h | 4,316 | 8,983 |
Outage episodes by size in 2018: 190 reached 100+ customers, 63 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 Jefferson County reported on EIA Form 861 for 2018, 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 88% of Colorado's customers in 2018; 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, 2018, 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/2018/colorado/jefferson-county