County annual report · FIPS 08005
2017 Arapahoe County, CO Power Outage Report
In 2017, customers in Arapahoe County, CO went without power for an average of 1.3 hours, a total of 414K customer-hours (Colorado average 1.5 hours). That ranks 27th worst of 48 Colorado counties and 1919th 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 Arapahoe 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 | October 30, 2017 11:15 | October 31, 2017 14:00 | 1d 2h | 53,378 | 29K |
| 2 | October 9, 2017 08:00 | October 13, 2017 01:45 | 3d 17h | 10,327 | 85K |
| 3 | June 1, 2017 13:15 | June 2, 2017 07:30 | 18h 15m | 8,273 | 11K |
| 4 | August 15, 2017 20:00 | August 16, 2017 05:30 | 9h 30m | 5,369 | 4,960 |
| 5 | July 17, 2017 06:45 | July 21, 2017 00:15 | 3d 17h | 4,965 | 14K |
| 6 | May 9, 2017 08:45 | May 9, 2017 10:00 | 1h 15m | 4,947 | 3,860 |
| 7 | September 12, 2017 13:45 | September 15, 2017 22:15 | 3d 8h | 4,652 | 11K |
| 8 | November 25, 2017 07:45 | November 26, 2017 04:00 | 20h 15m | 4,293 | 9,750 |
| 9 | May 4, 2017 07:15 | May 4, 2017 09:15 | 2h | 4,010 | 6,015 |
| 10 | June 23, 2017 12:00 | June 24, 2017 03:00 | 15h | 3,912 | 4,038 |
Outage episodes by size in 2017: 175 reached 100+ customers, 39 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 Arapahoe 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 |
| Mountain View Elec Assn, Inc | 2017 | 3.0 hrs | 1.25 | 59 min | 0.54 |
| 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 2017; 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, 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/arapahoe-county