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Vantage to Pomona Heights Chapter 4 <br />230 kV Transmission Line Project FEIS Environmental Consequences <br /> PAGE 4-171 <br />Access Levels for Route Segment 1a/NNR-1 are assumed as Level 2 for the entire route segment. This <br />route segment would require the construction of less than 5,016 feet of spur roads off of existing roads <br />(see Table 4.7-2). No new access road construction would be necessary for this route segment. <br />4.7.4.2 Route Segment 1b <br />Route Segment 1b would be located in the JBLM YTC and accessed from Sage Trail Road. The fire <br />break perimeter road would serve as the primary access road to the route segment. Some new road <br />construction would be required where the route segment diverges from the perimeter of the JBLM YTC. <br />Resulting impacts on the existing roads would be low. <br />Route Segment 1b would require the construction of approximately 4.5 miles of spur roads and <br />approximately 1.3 miles of access roads for a total of 5.8 miles of new roads. Low impacts are expected <br />as a result of the construction of Route Segment 1b. <br />4.7.4.3 Route Segment 1c <br />This route segment would also be accessed from Sage Trail Road as well as Arthur Boulevard, John <br />Street, William Court, and various 2-track roads northwest of Kittitas Canyon. Sumerset Drive and <br />Chapman Road would provide adjacent access through Kittitas Canyon north of Mieras Road and <br />minimal improvements would be necessary for these roads. The route segment would be accessed by <br />Coombs Road and would follow Mieras Road on the south end of the route segment. Mieras Road is a <br />gravel road from the Coombs Road intersection east, and Coombs Road is a gravel road from Mieras <br />Road south. These roads would not require improvements. East of a residential area generally east of the <br />Mieras Road-Prairie Road intersection, new road construction would be necessary along the southern <br />border of JBLM YTC. New road construction accounts for the majority of road building for this route <br />segment. <br />Route Segment 1c would require the construction of approximately 3.9 miles of spur roads and <br />approximately 4.4 miles of access roads for a total of 8.3 miles of new roads. If the route segment used <br />JBLM YTC roads, Route Segment 1c would require the construction of approximately 5.1 miles of spur <br />road and no new access road, a difference of 3.2 miles. Moderate to low impacts will result from the <br />construction of Route Segment 1c. <br />4.7.4.4 Route Segment 2a <br />Access to Route Segment 2a would be from the east end of Postma Road and new road construction <br />would be required. Improvements to a two-track road would be required. Resulting impacts on the <br />existing roads would be low. Route Segment 2a would require the construction of approximately 1,050 <br />feet of new spur road and 0.6 mile of new access road for a total of 0.8 mile of new road. <br />4.7.4.5 Route Segment 2b <br />Route Segment 2b generally crosses rangeland with limited two-track road development. These two-track <br />roads would require improvement to varying degrees. New road construction would account for most of <br />the roads along this route segment. Route Segment 2b would require the construction of approximately <br />1.9 miles of new spur roads and approximately 15.2 miles of access roads for a total of 17.1 miles of new <br />roads. Existing roads located within the JBLM YTC may be utilized where the Project follows the <br />southern boundary of the base. If the Project used JBLM YTC roads for access, Route Segment 2b would <br />require the construction of approximately 4.6 miles of spur road and 6.1 miles of new access road for a <br />total of 10.7 miles of new roads, a difference of 6.4 miles of new road construction. Resulting impacts <br />would be low.