Siting and Planning Studies

Prior to holding scoping meetings and initiating the NEPA process, the RUS requires that the Project proponent prepare and submit an Alternative Evaluation (AE) and Macro Corridor Study (MCS) to the RUS. Upon acceptance of these documents by the RUS, scoping meetings can be scheduled.

The purpose of an AE and MCS is to evaluate system level (point A to point B) alternatives that best meet the purpose and need for a project, as well as identify preliminary corridor alternatives.

The AE evaluates the system alternatives that best meet the purpose and need of the project, which is to support renewable energy development and increase electric power reliability. A number of alternatives were studied, including "no action", additional generation capacity and demand side management alternatives.

The MCS is used to identify preliminary corridors that are chosen based on an evaluation of opportunities and constraints gathered from existing land use and environmental data. Preliminary corridors are typically made up of segments that are a minimum of one-mile wide and allow for flexibility in future identification of a preferred and alternative route(s), while minimizing impacts to resources.

In addition to describing the purpose and need for the project, an AE/MCS document describes the corridor identification process in more detail, including a description of identified opportunity and constraints for a project area.

San Luis Valley to Calumet and Calumet to Walsenburg Segments

Calumet to Comanche Segment

San Luis Valley - Calumet - Comanche Transmission Project

In the News

Power line generates public comments
Valley Courier
April 27, 2012


SLV power line headed back to drawing board
Pueblo Chieftain
April 27, 2012


Support for San Luis Valley line isn't powering down
Denver Post
November 2, 2011


Xcel is out, but transmission line is not
Valley Courier
November 2, 2011


Xcel likely to drop SLV solar, transmission line proposal
Pueblo Chieftain
November 1, 2011


San Luis Valley Power
Pueblo Chieftain
September 14, 2011


Colorado PUC reaffirms approval of San Luis Valley power line sought by Xcel, Tri-State
Denver Business Journal
September 2, 2011




This Web site is hosted and maintained by Tri-State and Xcel Energy. The goal is to provide Colorado residents with facts and details of transmission development as we work to provide safe, reliable electricity. We encourage and appreciate public input to the process.

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