SB 25-127 Colorado Senate · 2025 Regular Session

Optimizing Colorado Electric Transmission System

Summary
Current law requires the Colorado electric transmission authority (authority) to conduct a study on the need for expanded transmission capacity in the state and prepare a final report of the study on or before January 31, 2025. Section 2 of the bill authorizes the authority to conduct the study on a recurring basis and requires the authority to present a statewide transmission plan, based on the results of the study, to the Colorado public utilities commission (commission) and the legislature every 3 years, beginning on or before September 1, 2027. Section 2 requires the authority to consider advanced transmission technologies in the study and identify certain projects that use advanced transmission technologies. "Advanced transmission technologies" is defined in section 1 as hardware or software technologies that increase the capacity, efficiency, reliability, or resiliency of an existing or new transmission facility. Section 3 designates the authority as a statewide transmission coordinator. Among other duties, the authority is required to facilitate coordinated statewide planning; engage with regional and interregional planning processes; and establish an expert advisory panel to review and provide feedback on model inputs, assumptions, and approaches. Under current law, an electric utility must submit an electric resource plan to the commission for approval. Sections 4 and 5 require an electric utility to: Include in the electric resource plan a transmission plan that identifies certain transmission resources and projects; Incorporate in the electric resource plan an evaluation of advanced transmission technologies or submit to the commission an explanation of why advanced transmission technologies are not included in the electric resource plan; and Provide model inputs and assumptions and other system information or methodology consultation necessary to support the authority in acting as a statewide transmission coordinator. Section 4 allows the commission to design incentives for a retail electric utility that utilizes advanced transmission technologies. Section 6 requires an electric utility to consider advanced transmission technologies in the electric utility's 10-year transmission plan.(Note: This summary applies to this bill as introduced.)
Bill status in committee 1 of 4 stages cleared
Introduction
Feb 2025
Committee Review
Floor Vote
Governor
Introduced Feb 5, 2025 Last action Apr 17, 2025
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What changed between versions

Introduced (02/05/2025) PA1 (03/27/2025) · 5 edits
MODERATE
The bill was amended to shift focus from a general 'Colorado Grid Optimization Act' to a more specific 'Carbon dioxide emission reductions' framework. The changes redefine transmission technologies to prioritize renewable energy connection and wildfire risk reduction, while adding requirements for utilities to evaluate advanced transmission technologies in their resource plans.
Scope change
The bill's scope changed from a general grid optimization framework to a specific carbon emission reduction goal aligned with a 2050 elimination target.
DEFINITION

Redefinition of 'Advanced Transmission Technologies' to explicitly include increasing capacity for renewable and zero-carbon resources and lowering costs.

REQUIREMENT

New requirement for qualifying retail utilities to include an evaluation of advanced transmission technologies in their electric resource plans starting September 1, 2025.

Added requirement for utilities to submit detailed explanations if they do not incorporate advanced transmission technology evaluations, including cost-effectiveness analyses.

Study requirements now include specific goals such as reducing curtailment of renewable resources, reducing wildfire ignition risk, and increasing capacity for new renewable energy connections.

SCOPE

Bill title and purpose changed from general grid optimization to specific carbon emission reduction goals with interim targets.

Floor votes

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Full legislative history

Actions timeline

Total actions
8
Key actions
1
Committee
1
Mar 26, 2025
Upper · Passed
Senate Committee on Transportation & Energy Refer Amended to Senate Committee of the Whole
upper
Feb 5, 2025
Introduced
Introduced In Senate - Assigned to Transportation & Energy
upper
2 primary · 0 co-sponsors

Sponsors