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Draft Supplemental Environmental Impact Report Page IV.B-36 Forward Inc. Landfill 2014 Expansion Project long vehicle queues would form, and pedestrian safety would be diminished. For these reasons, a triple turn lane is infeasible. Thus,no mitigation measures are available to reduce this impact to a less-than-significant level, and the deterioration of LOS at this intersection in year 2035 (without the proposed project)would be a significant and unavoidable cumulative impact attributable to cumulative development without the proposed project. Implementation of a second northbound left turn lane would reduce the cumulative transportation impact at the Austin/Arch intersection to LOS E;however, the previously proposed project's additional contribution to the unacceptable level of service at the i Austin/Arch intersection would remain a significant unavoidable impact. This same impact would be the worst-case effect of the 2014 Expansion Project, which would not result in any new impacts not evaluated in the 2013 EIR. �- The intersection of SR 99 and Arch Road would operate at LOS F in both peak hours under cumulative 2035 conditions (without the project). Addition of project traffic to cumulative 2035 conditions would increase the delays at this intersection. The traffic study for the Mariposa L, Lakes development determined that this impact would be significant and unavoidable, and that no further mitigation is feasible. (TJKM,2007). Therefore, the previously proposed project's additional contribution to the unacceptable level of service at the SR 99/Arch would remain a significant unavoidable impact. This same impact would be the worst-case effect of the 2014 Expansion Project, which would not result in any new impacts not evaluated in the 2013 EIR. The intersection of SR 99 and Mariposa Road SB Ramp would operate at LOS F in both peak `•• hours under cumulative 2035 conditions (without the project). Addition of project traffic to cumulative 2035 conditions would increase the delays at this intersection. The traffic study for the Mariposa Lakes development determined that this impact would be significant and `, unavoidable, and that no further mitigation is feasible. Therefore, the previously proposed project's additional contribution to the unacceptable level of service at the SR 99/ Mariposa Road SB Ramp would remain a significant unavoidable impact. This same impact would be the worst-case effect of the 2014 Expansion Project, which would not result in any new impacts not evaluated in the 2013 EIR. The driveway of the CHCF would operate at an acceptable LOS C or better in 2035, as +,. mentioned above. In 2031, the last year of operation of the 2014 Expansion Project, this intersection would operate at the same or better LOS. The added traffic due to the 2014 Expansion Project (137 a.m. and 28 p.m. peak hour trips) is not expected to worsen the intersection to unacceptable conditions. Therefore, the 2014 Expansion Project would result in a less-than-significant cumulative impact at this new intersection. Newcastle Road Access L As described under Impact B.1, an alternate access to the landfill at Newcastle Road was considered in the 2013 EIR. That EIR found that, under year 2035 cumulative conditions with is, the use of Newcastle Road for landfill access, the intersections of Austin Road/Forward Driveway and Arch/Newcastle Road would operate at acceptable levels of service,but the Austin/Arch Roads,SR 99/Arch Road, and SR 99/Mariposa Road SB Ramp intersections 60 would operate at unacceptable Level of Service F, with an average delay similar to year cumulative 2035 conditions if the existing landfill entrance on Austin Road is used. Thus,use of Newcastle Road for landfill access for the previously proposed project would not avoid the deterioration of level of service at the Austin/Arch Roads,SR 99/Arch Road, and SR 99/Mariposa Road SB Ramp intersections to unacceptable conditions in the cumulative year 2035, and 2035 cumulative impacts with alternate access at Newcastle Road would be similar to