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Vantage to Pomona Heights Chapter 4 230 kV Transmission Line Project FEIS Environmental Consequences PAGE 4-172 4.7.4.6 Route Segment 2c Much of this route segment would be accessed along the existing Union Gap-Midway 230 kilovolt (kV) and Midway-Moxee 115 kV corridor access roads. However, this route segment also crosses undeveloped land with limited, two-track road access that would require some improvements. Route Segment 2c would require the construction of approximately 5.0 miles of spur roads and approximately 6.2 miles of access roads for a total of 11.3 miles of new roads. The construction and operation of this route segment could affect local air traffic, which may consist of aerial spray applicators servicing the agricultural fields located adjacent to the existing Midway-Moxee 115 kV corridor. However, because there are already multiple existing transmission lines in the area and notification of the aerial applicators would occur, low impacts are expected. 4.7.4.7 Route Segment 2d Route Segment 2d generally crosses rangeland with limited 2-track road development. These two-track roads would require improvements to varying degrees. New road construction would account for more than half of the new roads constructed along this route segment. Route Segment 2d would require the construction of approximately 1.5 miles of new spur roads and approximately 4.7 miles of access roads for a total of 6.2 miles of new roads. Resulting impacts would be low. 4.7.4.8 Route Segment 3a Route Segment 3a is located adjacent to existing transmission lines interconnecting with the Vantage Substation and the existing road access for these transmission lines would be utilized for this route segment. Minimal spur road construction would be necessary for this route segment, and impacts would be low. Route Segment 3a would require the construction of approximately 420 feet of new spur roads off of existing roads. No new access road construction (Level 4+ as described in Table 2-4) would be necessary for this route segment. Resulting impacts would be low. 4.7.4.9 Route Segment 3b This route segment follows the abandoned Chicago, Milwaukee, St. Paul & Pacific Railroad Corridor, and access along the route segment would be provided utilizing this abandoned corridor. Access to the route segment from the south would be via the Midway Substation Road located directly off of SR-24 or from Huntzinger Road from the north. The Midway Substation Road is paved to the vicinity of the substation. Huntzinger Road is paved for 10.8 miles from I-90 to the Auvil Fruit Company entry area. Improvements would not typically be necessary along these access routes, but may be necessary where the route segment follows the railroad corridor because widening or other improvements to the railroad bed may be necessary. The highest impacts on transportation for Route Segment 3b would be as a result of traffic delays during construction along Huntzinger Road, and road closure for a short period of time may be necessary. Because this is the only road servicing the area, rerouting traffic would not be possible. Resulting impacts would be moderate. On the east side of the Columbia River, existing roads would require minimal improvements, and the route segment would cross SR-243, requiring consultation with WSDOT. Authorization to span the Columbia River for Route Segment 3b would be required from the U.S. Army Corp of Engineers (USACE) through the Section 10 Rivers and Harbors Act permitting process. In addition, Washington State Department of Natural Resources’ (DNR’s) aquatic use authorization for the crossing of state- owned aquatic land would be required. Resulting impacts on the transportation network in this area would be low. Flashing lights or spherical balls on the conductors may be required for the portion of the route segment crossing the Columbia River. Pacific Power would consult with the FAA regarding the installation of lights or any other visual warning devises required for aviation safety. Resulting impacts would be low.