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06 16 20 PWA_02_02 Exh2 - IS-MND
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75B - FAIRVIEW BRIDGE PROJECT CD
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06 16 20 PWA_02_02 Exh2 - IS-MND
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INITIAL STUDY/MITIGATED NEGATIVE DECLARATION FAIRVIEw BRIDGE REPLACEMENT AND STREET IMPROVEMENTS w <br />MAY 2020 (9TH STREET TO 16TH STREET) PROJECT <br />J" <br />SANTA ANA. CALIFORNIA <br />local vehicular traffic and could affect travelers on Fairview Street. In addition, construction of the <br />proposed Project would require temporary closure of a portion of the SART for the demolition and <br />placement of the bridge superstructure. The SART includes a Class I bike path on the eastern side <br />and a regional riding and hiking trail on the western side. The portion of the SART affected by <br />Project construction would need to be temporarily closed four times for approximately 8 hours each <br />during two summer periods for the placement of precast concrete girders. During these periods, <br />SART users would be detoured, and signage would be provided to display the dates of the closures <br />and identify the detour routes. Work on the north and south sides of the bridge would be <br />completed during separate periods so that SART users can be detoured to the trail on the opposite <br />side of the Santa Ana River at 5th Street. There are gates and ramps located on both sides of the <br />SART at 5th Street that provide access to bicyclists and pedestrians for these detours. <br />On May 16, 2018, a coordination meeting was held in order to discuss the potential SART closures <br />required by the proposed Project. Attendees included staff from the City, Caltrans, and OC Parks as <br />well as the Project engineer and environmental consultant. The detour plan was revised based on <br />OC Parks input. In addition, requirements for SART closures, including warning signs and flagmen, <br />were noted and have been included as part of the proposed Project. As discussed at the meeting, <br />details regarding the bike detours would be coordinated with OC Parks during construction at least <br />30 days prior to the temporary closure of the SART so that OC Parks can also provide the closure <br />information on its website. Other short-term closures of up to 15 minutes would be allowed with <br />flagmen. <br />Potential impacts to travelers on Fairview Street or the SART in the Project area during construction <br />would be avoided or minimized with development and implementation of a TMP that identifies how <br />the safe movement of vehicular, pedestrian, and bike traffic would be safely handled during <br />construction, including signage and bike detour routes and coordination with OC Parks. Mitigation <br />Measure TR-1 requires that a TMP be prepared during final design and implemented during <br />construction. Therefore, with implementation of Mitigation Measure TR-1, construction activities <br />would not conflict with a program plan, ordinance, or policy addressing the circulation system, <br />including transit, roadway, bicycle, and pedestrian facilities. <br />In addition, LSA prepared future traffic forecasts for 2021 baseline (No Project) and Plus Project <br />conditions as well as 2040 No Project and Plus Project conditions using the long-range traffic <br />modeling tool, the Orange County Transportation Analysis Model (OCTAM). OCTAM is a travel <br />demand model derived from SCAG's Regional Model that provides more specific land use and <br />network information for Orange County. The 2021 baseline traffic forecasts represented the <br />anticipated conditions at the anticipated Project completion year. The 2040 traffic forecasts <br />represent long-range design year traffic conditions. Due to Project development delays, the current <br />projected opening year is 2022. <br />The 2021 No Project and Plus Project traffic forecasts were developed based on interpolating the <br />overall growth between existing (2017) volumes and 2040 No Build and Build forecasts. Specifically, <br />the proportional growth from 2017 to 2021 (4 years) was scaled against the overall growth between <br />2017 and 2040 (23 years) to develop a growth ratio of 17.39 percent. This growth percentage was <br />applied to the growth between 2017 and 2040 forecasts at each study intersection and roadway <br />segment to arrive at 2021 No Build and Plus Project traffic forecasts. <br />R:\WKE1702\ISMND\Final ISMND\Fairview Street Bridge Final ISMND.docx (05/26/20) 3-95 <br />
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