Greenwood to Arapahoe Transmission Line Upgrades
Overview
As part of the Denver Metro Transmission Upgrades, we are upgrading approximately 9.5 miles of 230 kilovolt overhead electric transmission line in Arapahoe County and Denver. Work will occur between the existing substations:
- Greenwood Substation: South Holly Street and East Weaver Avenue in Centennial
- Arapahoe Substation: South Platte River Drive and West Harvard Gulch in Denver
Additional upgrades are being made to associated equipment at the substation.
The Greenwood to Arapahoe Transmission Project is part of a larger multi‑year effort to rebuild and upgrade vital, higher voltage transmission infrastructure across the Denver Metro area as part of the Denver Metro Transmission Upgrades.
This map is a graphic and may not show exact locations
Schedule
Work is expected to occur between August and December 2026.
Schedules are subject to change.
Construction Impacts
During work this project, you will notice:
- Marking of utility lines and utility survey holes
- Road, sidewalk and trail closures
- Traffic control
- Temporary changes to access
- Construction noise
- Equipment and materials staging
We will restore work areas to conditions required by permits as weather allows. Work areas may be left temporarily restored after construction until we can complete final restoration.
