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Transmission planning

Each year, Tri-State develops a 10-year transmission plan that assesses future transmission needs for Tri-State’s 42 member electric cooperatives. The transmission component of this plan is developed in conjunction with West Connect and the Colorado Coordinated Planning Group (CCPG), formal regional transmission planning organizations recognized by the Western Electricity Coordinating Council (WECC).

As part of the Colorado Public Utilities Commission (COPUC), Rule 3627, Tri-State files its 10-year transmission plan with the COPUC on a biennial basis each February 1.

For more information, to send us your questions or comments regarding our transmission plans, or to be added to the stakeholder outreach list for future transmission planning meetings, please email TransmissionPlanning@tristategt.org.

Details, Stakeholder Outreach and PUC filings

Network model data

To request Network Model Data, complete this form. If you have any questions, please contact Interconnections@tristategt.org.

Transmission projects

Tri-State continues to invest in transmission infrastructure to ensure dependable power delivery to its 42 member cooperatives throughout its four-state service territory. The West’s vast power supply network is currently strained – improvements and expansion to the system are essential to enhancing regional power reliability.

Additional transmission facilities open the door to diverse energy resources that include renewable energy. The investments in additional lines support renewable energy projects by alleviating transmission constraints to make projects economically viable. Expanding Tri-State's transmission network facilitates the G&T's ongoing pursuit of additional renewable resources.

Details and active projects

Transmission OATT rate – supporting documentation

If you are an Interested Party* who would like to request access to supporting documentation, please complete this form.  Once you have a login, access supporting documentation here.

To access Tri-State’s OATT filings and protocols, please click here. If you have any questions, please contact Tri-State Transmission Rates.  

*An “Interested Party,” as defined in Tri-State’s OATT rate protocols includes, but is not limited to, customers under the Tri-State Tariff, state utility regulatory commissions, and state attorneys general.
 

OASIS

Procurement

Resource planning

Authorized energy marketing personnel and contacts

View the authorized traders, schedulers and other wholesale market personnel at Tri-State Generation and Transmission Association.

Contact us EnterpriseRisk@tristategt.org

Northern Colorado joint communications project

The Northern Colorado Joint Communications Project (NCJCP) consists of three entities: Tri-State G&T, Western Area Power Administration and Xcel Energy. It was formed to provide a low-cost replacement for aging analog communications systems that were wholly owned by each entity.

Access for Tri-State G&T, Western Area Power Administration and Xcel Energy use. The NCJCP area is password protected.

CCR rule compliance data

On April 17, 2015, the EPA published the Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals from Electric Utilities: Final Rule in the Federal Register. The CCR Rule regulates the disposal of CCR in surface impoundments and landfills as a solid waste under the Resource Conservation and Recovery Act (RCRA). As required by 40 CFR 257.107, Tri-State maintains data and information to demonstrate compliance with the CCR Rule on its publicly accessible internet site. Those reports are available at each site through the Coal Combustion Residuals link provided below.

Coal Combustion Residuals Reports and Certifications

FERC Standards of Conduct

  • Chief Compliance Officer designation

  • Written procedures

  • Identification of affiliate names and addresses

  • Employee staffed shared facilities

  • Transmission function employees’ job titles and job descriptions

  • Transfers of employees between marketing function and transmission function

  • Potential merger partner information

  • Waivers

  • Contemporaneous disclosure

  • Voluntary consent provision

  • Incident reporting form

  • Emergency circumstances deviations

  • Discretionary actions under the tariff

  • Discounts

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Tri-State Generation and Transmission Association
Office: 303-452-6111
1100 West 116th Avenue
Westminster, CO 80234

Mailing address:
PO Box 33695
Denver, CO 80233-0695

©2023 Tri-State Generation and Transmission Association, Inc. Power supplier to the rural west.

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