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 Service Studies (DNR, DNL, T-T, T-L)
Last Updated January 26, 2026

PSCo Generation Interconnection Requests and Studies - Pre 2019 Queue Reform
Last Updated March 23, 2021

PSCo Generation Interconnection Requests and Queue
Last Updated January 26, 2026

Generator Replacement Requests
Last Updated December 23, 2025

Attachment N and Attachment P Generation Study Reports
Last Updated January 27, 2026

Generation Interconnection Studies prior to 2017
Last Updated January 3, 2023

Operating Guides & Studies
Last Updated October 11, 2024

Miscellaneous Information
Last Updated January 5, 2021

Transmission Planning Documents
Last Updated September 14, 2023
 

For questions or further information, please contact:

Krystal Schuldheisz
Public Service Company of Colorado
3500 Blake St.
Denver, CO 80205
e-mail:  PSCoInterconnection@xcelenergy.com