Select the following links for information on  Public Service Company of Colorado transmission studies.
Colorado Long Range Transmission Group Information
Last Updated July 12, 2006

PSCo Transmission Requests
Last Updated March 29,  2012

PSCo Generation Interconnection Requests
Last Updated January 12, 2018

PSCo Non-Tariff Study Requests
Last Updated June 08, 2004

Transmission Studies Available Online
Last Updated November 28, 2017

Non-Queued Study Requests
Last Updated August 22, 2014

Operating Guides & Studies
Last Updated June 16, 2016

Miscellaneous Information
Last Updated June 16, 2016

Transmission Planning Documents
Last Updated August 16, 2017

For questions or further information, please contact:

Jennifer Bass
Public Service Company of Colorado
P.O. Box 1078
Golden, CO 80402

Phone: (303) 273-4726