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Vantage to Pomona Heights Chapter 4 <br />230 kV Transmission Line Project FEIS Environmental Consequences <br /> PAGE 4-182 <br />ROUTE <br />SEGMENT MILES OF NEW SPUR ROAD MILES OF NEW ACCESS ROAD TOTAL MILES OF NEW ROAD <br />NNR-2 <br />5.0 miles 2.03 0.00 2.03 <br />NNR-3 <br />9.3 miles 3.54 5.82 9.36 <br />NNR-4o/4u1 <br />4.5 mile 1.79 0.99 2.78 <br />NNR-5 <br />1.8 miles 0.68 0.13 0.81 <br />NNR-6o/6u1 <br />6.4 miles 2.59 0.56 3.15 <br />NNR-7 <br />8.2 miles 3.30 0.00 3.30 <br />NNR-8 <br />2.7 mile 0.91 0.21 1.12 <br />MR-1 <br />11.9 miles 1.95 16.74 18.69 <br />1 Disturbance area calculations for Underground Design Option and Overhead Design Option are identical regarding access road construction. <br />4.7.5 Mitigation Measures <br />RDFs described in Chapter 2 are designed to reduce effects from the proposed Project; therefore, no <br />additional mitigation would be required. Along with the RDFs detailed in Section 2.3, the Traffic <br />Management Plan would reduce impacts on transportation resources in the Project area. RDFs applicable <br />to transportation resources include: GEN-1, GEN-4, BIO-14, LU-1, LU-3, LU-5, LU-8, LU-11, LU-12, <br />LU-13, LU-20, VIS-4, SGW-1, PHS-5, and TR-1 through TR-11. Refer to Chapter 2, Section 2.3 for a <br />complete list and description of RDFs. <br />4.7.6 Residual Impacts <br />Residual impacts are identical to the impacts described in Section 4.7.4 because no additional mitigation <br />measures are proposed for transportation. <br />4.7.7 Impact Summary By Alternative <br />4.7.7.1 No Action Alternative <br />Under the No Action Alternative, the proposed Project would not be constructed or operated. No Project- <br />related impacts to transportation would occur. <br />4.7.7.2 Action Alternatives <br />Alternative F would require the most new and spur road construction, but would not require the crossing <br />of I-82. All Action Alternatives cross SR-243 in one of two locations. One potential crossing location is <br />approximately 0.3 miles north of Wanapum Village with the other potential crossing located 3.3 miles <br />west of the Vernita Bridge. The NNR Alternative - Overhead Design Option and NNR Alternative - <br />Underground Design Option would require the least amount of new road construction. Although the <br />disturbance calculations used the same access road assumptions as the NNR Alternative - Overhead <br />Design Option, the NNR Alternative - Underground Design Option would also require the least amount <br />of new access road construction, but grading requirements of the access road (and duct bank) would <br />require the disturbance of more land in steep terrain.