Project Overview
The Alamosa to Antonito Transmission Line Rebuild Project, announced in November 2021, involves replacing approximately 39 miles of 69-kilovolt (kV) electric transmission line between the Alamosa Terminal and Antonito substations (Project). Due to natural weathering and unscheduled interruptions in service, the wood pole structures, equipment and components that were installed more than 60 years ago need to be replaced. The new infrastructure will more effectively meet current and future customer energy needs, improve overall electric service to homes and businesses in Alamosa and Conejos counties and mitigate fire risk from extreme weather events.
The existing electric transmission line is critical to providing reliable service to customers and cannot be taken out of service while being replaced. For that reason, Xcel Energy initiated a study in the fall of 2021 to identify a new transmission line corridor that minimizes environmental and community impacts while meeting engineering and safety standards. The new transmission line will be rebuilt to current design standards that will improve system reliability, meet customer energy needs now and into the future, and reduce wildfire risk.
During the construction process, all existing structures and conductors (wires) will be removed and rebuilt with new fire-resistant steel structures that are built to specifications consistent with Xcel Energy’s systemwide design, new conductors and new optical ground wire (OPGW). The OPGW keeps our system smart by providing a communication channel to transmit system performance data to aid in faster, more efficient response times if power is interrupted. The OPGW also aids as a grounding source for lightning during storms. The project meets Xcel Energy system needs by installing new fire-resistant steel poles.
Permitting
In January 2024, Xcel Energy submitted a land use permit application to Alamosa County for Project approval. The Alamosa Board of County Commissioners conducted a public hearing concerning the permit in July, at the county courthouse. During the hearing, Commissioners voted to approve the land use permit. Work was completed building the new line in Alamosa County in November 2025. The new line will be energized in December 2025 and the removal of the existing line in Alamosa County will be completed in early 2026.
An application to Conejos County will be filed at a later date. Public hearings will be scheduled before the Conejos County Planning Commission and Conejos County Board of County Commissioners (following a recommendation by the Planning Commission).
Xcel Energy’s right-of-way team is committed to working with affected landowners throughout the easement acquisition and construction process. Please contact us at the number or email below with questions you may have about the Project and how it may affect your property.
