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Pacific Direct Current Intertie (PDCI) Upgrade Project (DOE/EA-1937) *
Lake, Jefferson, Crook, Deschutes, and Wasco counties, Oregon


  • PROJECT DESCRIPTION:


  • BPA proposes to upgrade its portion (265 miles) of the Pacific Direct Current Intertie (PDCI) 500-kilovolt transmission line between its Celilo Converter Station in The Dalles, Oregon, and the Nevada-Oregon border where BPA ownership of the line terminates. The work would uprate the transfer capability of the PDCI from 3,100 megawatts (MWs) to 3,210 MWs, with a full potential of 3,800 MWs if the southern portion of the line is later upgraded. Equipment upgrades would improve reliability and performance of the aging line.

    Improvements would include new hardware assemblies, insulators, dampers, and shunts on 265 miles of the PDCI transmission line. About 1.8 miles of the line would be reconductored to match the remainder of the line. In order to improve reliability of the line in the event of tower failure, four new dead-end structures would be constructed between towers 141/2 and 141/3, 159/2 and 159/3, 175/1 and 175/2, and 199/2 and 199/3. Equipment upgrades would improve reliability and performance of the aging line.

    Most of the existing access roads would be improved to accommodate construction equipment. Improvements could include rocking, grading, and minor expansion of the existing footprint. Some new permanent and temporary spur roads would be added in areas where existing access is not available to individual tower sites (typically where right-of-way crosses agricultural fields). On access roads where new dead-end towers would be located, roads would be reinforced and expanded to accommodate larger construction equipment. About 210 miles of existing access roads could be improved with minor rocking/grading, and about 0.6 mile of new t access roads would be constructed as part of this project.

    To understand the potential environmental impacts of this proposal, BPA will prepare an environmental assessment (EA). Two alternatives will be studied in the EA: to upgrade the line, or not to upgrade and continue with current operation and maintenance practices. The EA will describe anticipated impacts to natural and human resources and include mitigation measures that would enable BPA to avoid or minimize impacts.


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  • CURRENT STATUS:


  • BPA has prepared a draft environmental assessment (EA) to evaluate the potential impacts of the proposed project, and identified ways to reduce those impacts. Two alternatives are studied in the EA: to upgrade the line, or not to upgrade and continue with current operation and maintenance practices. The EA describes anticipated impacts to natural and human resources and include mitigation measures that would enable BPA to avoid or minimize impacts.

    Based on the analysis in the EA and comments received, BPA will prepare either a finding of no significant impact and decide whether to proceed with the project, or an environmental impact statement if there is the potential for significant environmental impacts.

  • COMMENTS:


  • Please submit your comments on the draft EA proposal and potential impacts by March 3, 2014. When commenting, refer to the full project name. Comments will be posted in their entirety on the project comments webpage.

    Comment Methods:
    Mail:



    Bonneville Power Administration
    Public Affairs - DKE-7
    P.O. Box 14428
    Portland, OR 97293-4428

    Toll-free:
    FAX:
    E-mail:

    800-622-4519
    503-230-4019
    www.bpa.gov/comment



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  • CONTACTS:


  • For environmental-related information, contact:    
    Carolyn Sharp , Environmental Lead
    Bonneville Power Administration - KEC-4
    P.O. Box 3621
    Portland, OR 97208-3621

    Toll-free:
    Direct line:
    Email:
    800-282-3713
    503-230-7692
    casharp@bpa.gov
    For project-related information, contact:    
    Erich Orth, Project Manager
    Bonneville Power Administration - TEP-TPP-1
    P.O. Box 61409
    Vancouver, WA 98666-1409
    Toll-free:
    Direct line:
    FAX:
    Email:
    800-282-3713
    360-619-6559
    360-619-6021
    etorth@bpa.gov



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 Page last reviewed on 7/15/2013 11:09:29 AM