PacifiCorp 2007 Integrated Resource Plan (May 30, 2007)

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PacifiCorp – 2007 IRPChapter 3 – The Planning EnvironmentThe Agencies determined that designating corridors as required by Section 368a of the Act constitutesa major Federal action which may have a significant impact upon the environment withinthe meaning of the National Environmental Policy Act (NEPA). For this reason, the Agencies arepreparing a draft Programmatic Environmental Impact Statement (PEIS) to identify the impactsassociated with designating energy corridors. Based upon the information and analyses developedin the PEIS, the Agencies will designate energy corridors by amending their respective landuse plans.Public scoping meetings were held in October and November 2005. Potential energy corridorlocations were depicted on draft maps and circulated for comment (See the following DOE website for these maps: http://corridoreis.anl.gov/eis/pdmap/index.cfm). The draft PEIS was releasedfor comments last fall. Final energy corridors will be identified in the final EIS which is scheduledto be released in August 2007. The majority of the preliminary energy corridors utilize existingcorridors and/or rights-of-way; however, there are a small number of potential new corridorlocations.Section 1221, National Transmission Congestion StudySection 1221 of the EPAct of 2005 required DOE to issue a national transmission congestionstudy for comment by August 2006 and every three years thereafter. Based on the study and publiccomments, DOE may designate selected geographic areas as "National Interest ElectricTransmission Corridors." Applicants for projects proposed within designated corridors that arenot acted upon by state siting authorities within one year may request FERC to exercise federal"backstop" siting authority. For the Western Interconnection, DOE relied on the Western CongestionAssessment Task Force (WCATF), which is an ad-hoc group formed primarily byWECC members, to complete the congestion study. The WCATF produced several work productsfor DOE including a summary of major studies, a report describing historical congestion,and the results of SSG-WI production cost studies conducted for the years 2008 and 2015. Figure3.2 is a map provided to DOE showing the major areas of congestion in the Western Interconnection.Based on the WCATF report and other information, the DOE produced a national transmissioncongestion report that shows congested areas across the Western Interconnection. The only criticalcongestion area highlighted in the Western Interconnection was in southern California. Inaddition to the congestion in southern California, it was noted that there are conditional constraintsin the PacifiCorp area in association with exporting potential new coal and wind resourcesfrom the states of Montana and Wyoming (See Figure 3.3)The effect of Section 1221 on PacifiCorp is unclear at this point, but it is expected to be beneficialas it should speed up the permitting process for new transmission facilities.54
PacifiCorp – 2007 IRPChapter 3 – The Planning EnvironmentFigure 3.2 – Western Interconnection Transmission Congestion Areas/PathsSource: Western Congestion Analysis Task Force, Western Interconnection Congestion Areas: Summary Tables 1, 2and 3 with Congestion Area Map, prepared for the U.S. Department of Energy, May 8, 2006.55
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