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BLM>Colorado>District Offices>Southwest District>NEPA: Tri-State 230kV Rebuild EA
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Image: Transmission lines across the sagebrush plateau

Image: Claret Cup Cactus

Image:  230-kV and 115-kV transmission lines

Image: Existing 115-kV transmission line and ROW

Image: West Needles Contiguous Area


 Tri-State Montrose-Nucla-Cahone Transmission
Improvement Project Environmental Assessment
(Proposed Right-of-Way Amendment) 



The Bureau of Land Management (BLM) Southwest District Office is seeking public comment on an environmental assessment (EA) analyzing the potential environmental effects of the proposed Montrose-Nucla-Cahone Transmission Improvement Project. Tri-State Generation and Transmission Association, Inc. (Tri-State) is proposing to improve the existing Montrose-Nucla-Cahone 115-kilovolt (kV) transmission line to operate at 230-kV.The existing 115kV transmission line is about 80 miles long with approximately 241 miles of existing access roads. About 51 miles of the transmission line and 125 miles of access roads are located on federal land. The project is in Dolores, San Miguel, Montrose and Ouray Counties, in Colorado. The proposed project, including environmental protection measures, is detailed in Tri-State’s draft Plan of Development.



The public review and comment period closed at 4:30 p.m. on December 3, 2015. Please note that the most useful comments are those that identify issues relevant to the proposed action or contain new technical or scientific information. Comments that contain only opinions or preferences will not receive a formal response, but may be considered in the BLM decision-making process.

Before including your address, phone number, e-mail address, or other personal identifying information in your comment, you should be aware that your entire comment—including your personal identifying information—may be made publicly available at any time. While you can ask us in your comment to withhold your personal identifying information from public review, we cannot guarantee that we will be able to do so.


For additional project information, contact BLM NEPA Coordinator Gina Jones by phone at (970) 240-5381 or by email to . Additional information about the USFS process can be obtained by contacting Liz Mauch by phone at (970) 240-5405 or by email to

The public meeting was held on Monday, Nov. 23, at the Dove Creek High School. To learn more about the project, please access the presentation below.




Project Maps

Click on Maps to link to a PDF


Tri-State Project Overview Map
Project Overview Map


 Dolores River Crossing Map

Dolores River Crossing Reroute Map 

Dry Creek Basin Map

Dolores River Crossing Map



Dear Reader LetterPreliminary Environmental Assessment

Appendix A - Appendix B - Appendix C - Appendix E

Draft Plan of Development (Appendix D) 

POD Appendix A

POD Appendix B

POD Appendix C

POD Appendix D

POD Appendix E

POD Appendix F

POD Appendix G

POD Appendix H

POD Appendix I

POD Appendix J

POD Appendix K

POD Appendix L

POD Appendix M

POD Appendix N

POD Appendix O

POD Appendix P

POD Appendix Q

POD Appendix R

POD Appendix S

POD Appendix T

POD Appendix U

POD Appendix V

POD Appendix W



Project FAQ Sheet

Scoping Report (November 2014)


 Appendix A


U.S. Forest Service LogoForest Service Tri-State Project Page



 Project Timeline Graphic

BLM Colorado Southwest District
2465 South Townsend Ave
Montrose, Colorado 81401

Phone: 970.240.5300
FAX: 970.240.5367
Barbara Sharrow, Acting District Manager