EMF and Noise Studies

When utilities construct transmission facilities, they take actions and use techniques to mitigate noise during construction and operation. Tri-State and Xcel Energy have taken steps to model the generation of audible noise and within their design plan to implement certain methods to reduce the noise during operation.

Additionally, the utilities have modeled electromagnetic fields that the proposed transmission lines would produce. A computer program is used to accurately predict the magnetic fields within the transmission corridors.


San Luis Valley to Calumet Segment


Calumet to Comanche Segment


Electromagnetic fields (EMFs) are invisible lines of force associated with the production, transmission, and use of electric power such as those associated with high-voltage transmission lines, secondary power lines, and home wiring and lighting. Many studies of EMF have been conducted but none have identified a mechanism where EMF can cause disease. Visit the following Web sites to investigate the topic further:

Electric and Magnetic Fields (National Institute of Environment and Health)

EMF Studies (World Health Organization)


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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