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NOTICE OF Pao:rnan nON OF ENVmON'IEN I M. IAii.0 r REPORT TANC TRvSS)nsstoN PRo.n:cr PAGE 3 The 172 -mile western corridor alternative of the Central Segment would lie along the western side of the Sacramento Valley. This alternative would be roughly parallel to and 5 to 20 miles west of the Interstate 5 corridor. It would pass just east of Black Butte Lake and west of the cities of Orland. Willows, and Williams. South of Winters, the western alternative would turn east and cross between the cities of Dixon and Vacaville before continuing east for approximately 35 miles to a proposed new substation in southern Sacramento County. west of SR 99 and south of Elk Grove. The 167 -mile central corridor alternative runs roughly parallel to and 5 to 10 miles west of SR 99 through the Sacramento Valley, just west of the cities of Red Bluff and Chico, then between the Sutter Buttes and Yuba City, and east of the cities of Woodland and Davis. The central alternative would then turn southeast, converging with the western alternative, and interconnect at the proposed new substation in southern Sacramento County. The 173 -mile eastern corridor alternative would be located west of the Sierra Foothills of the Sacramento Valley, roughly parallel to and 5 to 10 miles east of SR 99. This alignment would pass east of the cities of Red Bluff and Chico, through Oroville and east of Yuba City. This proposed alternative would then shift approximately 15 miles to the west and continue southward, west of the Sacramento Airport and West Sacramento to the proposed substation in southern Sacramento County. From the proposed new substation in southern Sacramento County, each of three alternative corridors would continue 40 to 45 miles southwest to a proposed new substation near the COTP's existing Tracy Substation. West Segment. The West Segment would include two, double- circuit, 230 -kV transmission lines from the Tracy area to the South San Francisco Bay area. The first would include upgrading the existing transmission line from the new substation near Tracy to Silicon Valley Power's existing Kifcr Receiving Station (KRS) in Santa Clara. Construction of this transmission line would include upgrading about 13 miles of existing, double circuit, 230 -kV transmission line from the proposed substation near Tracy to Western's Livermore Substation, and building 30 to 40 miles of new, double- circuit, 230 -kV transmission line from the Livermore Substation to the proposed substation near the KRS Substation. Up to 7 miles of this segment may he built underground. From the new substation near KRS, an approximately 500 -foot, 115 -kV transmission tic would he built to KRS. Two alternative corridors have been preliminarily identified for this transmission line. "the second double- circuit, 230 -kV transmission line would follow a southwesterly path from PG &E's existing "fesla Substation to just south of Livermore and through the cities of Fremont and Newark to PG &E's existing Newark Substation. East Segment. This segment would include building 40 to 45 miles of new, double- circuit, 500 -kV transmission line east from the new substation near Tracy, roughly paralleling Interstate 205 and SR 120, to a proposed substation located south of the Oakdale Airport. Two corridor alternatives have been preliminarily identified for the proposed 500 -kV transmission line, both of which would run north of the cities of Tracy and Modesto and south of the cities of Manteca, Escalon, and Oakdale. From the new substation near the Oakdale Airport, the East Segment would split into two alignments: a 7 to 11 mile, double- circuit, 230 -kV transmission line would run southwest to the Modesto Irrigation District's existing Parker Substation in Modesto; and a 15 to 22 mile, double circuit, 230 kV line would run south to a proposed new substation located just east of Turlock. 'three corridor alternatives have been preliminarily identified for each of the two, proposed, 230 -1N transmission lines. Sierra Foothills Segment. The Sierra Foothills Segment would include a new, double circuit, 230 kV transmission line, approximately 28 miles long. It would originate at the proposed substation near the Oakdale Airport and extend northeast, generally along SR 108, through the Sierra Foothills to Western's existing substation at the New Melones Dam. Alternative corridors for this segment have not been identified at this time.