NOTICE OF INSIGNIFICANT PROJECT CHANGE (Relocate Water Supply Pipeline) COSUMNES POWER PLANT PROJECT (01-AFC-19C) [California Energy Commission Seal]

(Relocate Water Supply Pipeline)

The Cosumnes Power Plant (CPP) project is a nominal 1000 megawatt (MW) natural gas-fired, combined-cycle electric generating facility located approximately 25 miles southeast of the City of Sacramento, in Sacramento County. The Sacramento Municipal Utility District (SMUD), project owner and operator, is proposing to construct the project in two 500 MW phases. The total project will be located on approximately 30-acres of an overall 2,480-acre owned by SMUD.

Phase 1 of the project was certified September 9, 2003, and commenced construction on October 31, 2003. SMUD will decide at a later date whether or not to seek approval to proceed with the construction of Phase 2.

On November 19, 2003, the Energy Commission staff received a petition from SMUD to modify the project description for the CPP project.

DESCRIPTION OF PROPOSED MODIFICATIONS: SMUD is seeking approval to: In the current project description, the pipeline runs approximately one-half mile north from the CPP site to the existing Rancho Seco site. The pipeline will now run 200 feet northeast from the northeast corner of the CPP site to the Reservoir-Ranch Seco water supply line. The proposed pipeline modification will cause fewer environmental impacts by reducing:

Compared to the water supply pipeline route approved in CPP's Commission Decision, the proposed relocation will reduce the area of habitat disturbance and trenching by 90 percent.

Pursuant to section 1769(a)(2), Title 20, California Code of Regulations, Energy Commission approval for this change is not required if Energy Commission staff determines: 1) that there is no possibility that the modification may have a significant effect on the environment, and 2) that the modification will not result in a change or deletion of a condition of certification, or make changes that would cause the project not to comply with applicable laws, ordinances, regulations, or standards. Energy Commission staff has determined that the proposed modification to the water supply pipeline meets these criteria because:

If you object to staff's determination, please submit the objection in writing to Ms. Jeri Zene Scott, Compliance Project Manager, at the address above, or by fax at (916) 654-3882, or via e-mail at If no objection is received by Wednesday, December 31, 2003 at 5:00 P.M., the requested change will be approved.

This Notice is also posted on the Energy Commission's website at

If you have questions, please contact Ms. Jeri Zene Scott at (916) 654-4228.


TERRENCE O'BRIEN, Deputy Director
Systems Assessment & Facilities Siting Division

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