31B - CUP - 1901 NORTH FAIRVIEW ST

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City of Santa Ana Environmental Checklist threshold of LOS D during both the AM and PM peak hours without project traffic in 2035. Table 3- 37 indicates that the addition of project trips would increase traffic at the intersection of Fairview Street and 17th Street /Westminster Avenue in the AM peak hour by a V/C ratio of 0.025, which is above the threshold of 0.010. As a result, the proposed project would contribute to a cumulatively significant impact at the intersection of Fairview Street at 17th Street/Westminster Avenue during the AM peak hour. The City of Santa Ana requires project impacts to be mitigated to an acceptable LOS, which is LOS D or better at the intersection of Fairview Street and 17th Street /Westminster Avenue. The TIA identified an intersection improvement that would add a dedicated westbound right -turn lane and a signal phasing modification at the intersection. Modifying the westbound approach from a left -turn lane, two through -lanes and a shared through right -turn lane; to a left -turn lane, three through -lanes and a dedicated right -turn lane along with a westbound right -turn overlap phase to the signal phasing would decrease the V/C ratio to an acceptable level. The V/C is projected to be 0.926 under Future Buildout Year (2035) Plus Project Conditions. However, implementation of the intersection improvements would reduce the V/C ratio to 0.898, which is within the City's standard acceptable threshold of LOS D. To mitigate the proposed project's contribution to the future cumulative traffic condition, the T1A provided a fair share calculation at the impacted intersection for the AM peak hour to determine the project's fair -share contribution to the proposed mitigation measure. The percentage was developed by taking the total project -only traffic volume and dividing it by the total increase in traffic volume between Existing (2012) and Future Buildout Year (2035) with Phase 11. The project's fair -share contribution percentage was calculated to be 4.5 %, and is implemented through Mitigation Measure TR -1 to complete intersection improvements at the intersection of Fairview Street at 17th Sheet/ Westminster Avenue. Incorporation of this mitigation would reduce the project's cumulatively considerable impacts to a less - than - significant level and with incorporation of Mitigation Measure TR -3, the intersection of Fairview Street at 17th Street /Westminster Avenue would operate at LOS D, which is an acceptable level. Traffic warrants would not be met under cumulative conditions in the long -term 2035 condition. Mitigation Measure TR -3: Prior to the issuance of occupancy permits, the applicant shall pay a fair - share contribution toward the Fairview Street at 17th Street /Westminster Avenue intersection improvements that involve modifying the westbound approach from a left -turn lane, two through - lanes and a shared through right -turn lane; to a left -turn lane, three through lanes and a dedicated right -turn lane along with a westbound right -turn overlap phase to the signal phasing. This fair - share contribution shall be 4.5% of the improvement cost. The City would be responsible for implementing the intersection improvements in the future prior to year 2035. The Academy Charter High School 3 119 June 2012 Initial Study /Mitigated Negative Declaration ICF0092012 31 B -201