County annual report · FIPS 08005
2015 Arapahoe County, CO Power Outage Report
In 2015, customers in Arapahoe County, CO went without power for an average of 1.3 hours, a total of 434K customer-hours (Colorado average 1.2 hours). That ranks 14th worst of 33 Colorado counties and 1575th 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 Arapahoe 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 | June 19, 2015 21:15 | June 19, 2015 22:00 | 45m | 8,396 | 6,292 |
| 2 | June 20, 2015 00:00 | June 20, 2015 10:15 | 10h 15m | 8,372 | 9,684 |
| 3 | August 3, 2015 04:30 | August 4, 2015 17:45 | 1d 13h | 6,939 | 17K |
| 4 | October 22, 2015 12:00 | October 22, 2015 18:30 | 6h 30m | 6,242 | 6,349 |
| 5 | May 10, 2015 01:00 | May 11, 2015 07:45 | 1d 6h | 4,994 | 19K |
| 6 | August 5, 2015 04:30 | August 10, 2015 05:45 | 5d 1h | 4,388 | 23K |
| 7 | June 24, 2015 00:30 | June 25, 2015 17:00 | 1d 16h | 4,322 | 14K |
| 8 | October 22, 2015 23:30 | October 23, 2015 21:30 | 22h | 4,198 | 15K |
| 9 | October 16, 2015 13:15 | October 16, 2015 20:30 | 7h 15m | 4,159 | 7,320 |
| 10 | November 17, 2015 05:00 | November 18, 2015 11:30 | 1d 6h | 4,056 | 18K |
Outage episodes by size in 2015: 170 reached 100+ customers, 53 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 Arapahoe 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 |
| Mountain View Elec Assn, Inc | 2015 | 1.9 hrs | 0.85 | 57 min | 0.60 |
| Morgan County Rural Elec Assn | - | - | - | - | - |
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 ÷ 323,113 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. Arapahoe County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Arapahoe 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/arapahoe-county