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Vantage to Pomona Heights Chapter 4 <br />230 kV Transmission Line Project FEIS Environmental Consequences <br /> PAGE 4-178 <br />new access road for a total of 0.8 mile of new roads. Low impacts would result from the construction of <br />Route Segment NNR-5. <br />4.7.4.15 Route Segment NNR-6o/6u <br />Overhead Design Option <br />This route segment would be accessed from within JBLM YTC, typically along Pacific Power’s existing <br />Pomona-Wanapum 230 kV transmission line access roads. Existing roads on JBLM YTC land would be <br />used and improved as necessary (Access Level 2 or 3, typically). An existing paved secondary road <br />servicing the northern portion of JBLM YTC and Training Area 1 would be crossed at MP 2.1-2.2 by the <br />route segment. Impacts on JBLM YTC traffic using this road would be low because the development and <br />approval of a Traffic Management Plan would be implemented to reduce impacts on travel within JBLM <br />YTC. Route Segment NNR-6o would require the construction of approximately 2.6 miles of spur roads <br />and approximately 0.6 mile of access roads for a total of 3.2 miles of new roads. Low to moderate impacts <br />would result from the construction of Route Segment NNR-6o. <br />Underground Design Option <br />Impacts created as a result of the construction and operation of the Underground Design Option for Route <br />Segment NNR-6u would be greater than the Overhead Design Option because the JBLM YTC secondary <br />road would be closed during trenching and duct bank construction. Impacts would be low to moderate <br />because the development and approval of a Traffic Management Plan and repair of damaged roads would <br />reduce impacts on travel on this road within JBLM YTC. <br />4.7.4.16 Route Segment NNR-7 <br />This route segment would be accessed from within JBLM YTC, typically along Pacific Power’s existing <br />Pomona-Wanapum 230 kV transmission line access roads. Existing roads on JBLM YTC land would be <br />used and improved as necessary (Access Level 2). An existing JBLM YTC secondary road would be <br />crossed by the route segment at MP 7.7-7.8. Impacts on JBLM YTC traffic using this road would be low <br />because the development and approval of a Traffic Management Plan would be implemented to reduce <br />impacts on travel within JBLM YTC. Route Segment NNR-7 would require the construction of <br />approximately 3.3 miles of new spur roads and no new access roads. Resulting impacts would be low. <br />4.7.4.17 Route Segment NNR-8 <br />This route segment parallels Pacific Power’s existing Pomona-Wanapum 230 kV, Wind Ridge-Wanapum <br />230 kV, Schultz-Wautoma No. 1 500 kV, and Vantage-Schultz No. 1 500 kV transmission lines and <br />access roads and crosses the Columbia River. Access to the route segment would be from Huntzinger <br />Road on the west side of the Columbia River. Huntzinger Road is paved for 10.8 miles from I-90 to the <br />Auvil Fruit Company entry area south of the route segment. Improvements would be necessary where the <br />route segment follows the existing transmission lines on BLM land west of Huntzinger Road. The highest <br />impacts on transportation for Route Segment NNR-8 would be as a result of traffic delays during <br />construction along Huntzinger Road and SR-243 as a result of lane closure. However, bucket trucks <br />would be used for the stringing of the line across roads. Road closure for a short period of time may be <br />necessary on Huntzinger Road and because this is the only road servicing the area; rerouting traffic would <br />not be possible. Resulting impacts would be moderate.