County annual report · FIPS 08059
2015 Jefferson County, CO Power Outage Report
In 2015, customers in Jefferson County, CO went without power for an average of 1.4 hours, a total of 382K customer-hours (Colorado average 1.2 hours). That ranks 12th worst of 33 Colorado counties and 1552nd of 2,484 nationally.
Compared with CO, the US
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Jefferson County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 23, 2015 15:30 | May 23, 2015 20:00 | 4h 30m | 12,136 | 7,416 |
| 2 | May 23, 2015 21:30 | May 24, 2015 12:30 | 15h | 12,092 | 21K |
| 3 | August 29, 2015 02:45 | August 30, 2015 14:00 | 1d 11h | 10,578 | 15K |
| 4 | May 20, 2015 13:15 | May 20, 2015 19:15 | 6h | 10,348 | 5,278 |
| 5 | November 7, 2015 03:15 | November 7, 2015 06:30 | 3h 15m | 7,212 | 7,214 |
| 6 | August 3, 2015 04:45 | August 4, 2015 05:15 | 1d | 6,498 | 13K |
| 7 | September 6, 2015 13:45 | September 6, 2015 14:00 | 15m | 5,995 | 1,499 |
| 8 | June 24, 2015 00:30 | June 25, 2015 17:00 | 1d 16h | 4,842 | 6,736 |
| 9 | June 13, 2015 13:00 | June 14, 2015 07:45 | 18h 45m | 4,818 | 3,158 |
| 10 | May 20, 2015 21:00 | May 22, 2015 14:15 | 1d 17h | 4,684 | 4,178 |
Outage episodes by size in 2015: 159 reached 100+ customers, 41 reached 1,000+ customers, 4 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 2015, 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 | 2015 | 1.6 hrs | 0.98 | 88 min | 0.95 |
| CORE Electric Cooperative | 2015 | 4.5 hrs | 1.16 | 1.9 hrs | 1.04 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| United Power, 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 n/a of Colorado's customers in 2015; 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, 2015, 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/2015/colorado/jefferson-county