County annual report · FIPS 08005
2018 Arapahoe County, CO Power Outage Report
In 2018, customers in Arapahoe County, CO went without power for an average of 1.6 hours, a total of 528K customer-hours (Colorado average 1.6 hours). That ranks 26th worst of 49 Colorado counties and 2026th 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 Arapahoe 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 | February 8, 2018 17:00 | February 9, 2018 03:45 | 10h 45m | 24,149 | 14K |
| 2 | November 10, 2018 15:00 | December 28, 2018 22:00 | 48d 7h | 16,155 | 63K |
| 3 | July 19, 2018 00:15 | July 29, 2018 21:15 | 10d 21h | 7,368 | 56K |
| 4 | August 13, 2018 16:30 | August 13, 2018 22:30 | 6h | 5,207 | 2,846 |
| 5 | March 27, 2018 00:30 | March 29, 2018 05:45 | 2d 5h | 5,142 | 30K |
| 6 | August 16, 2018 20:30 | August 18, 2018 09:00 | 1d 12h | 4,821 | 22K |
| 7 | June 10, 2018 13:00 | June 12, 2018 10:45 | 1d 21h | 4,528 | 7,001 |
| 8 | August 26, 2018 19:30 | August 28, 2018 07:30 | 1d 12h | 4,487 | 11K |
| 9 | October 24, 2018 05:00 | November 10, 2018 11:45 | 17d 6h | 4,411 | 15K |
| 10 | October 23, 2018 16:45 | October 24, 2018 02:15 | 9h 30m | 4,237 | 6,077 |
Outage episodes by size in 2018: 156 reached 100+ customers, 45 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 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 |
| Mountain View Elec Assn, Inc | 2018 | 50 min | 0.58 | 50 min | 0.58 |
| 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 88% of Colorado's customers in 2018; 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, 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/arapahoe-county