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Fairview Street Bridge Rehabilitations RFP No. 14 -001 '"" Having completed several HBP bridge widening projects, such as the Foothill Boulevard Bridge for the city of San Dimas, and the Fifth and McFadden Bridge over Santa Ana River 'for the city of Santa Ana. We thoroughly understand the scope of work as well as the challenges associated with a bridge widening for sidewalk and bikeway Improvements for project over flood control facility, Areas of special consideration include developing a cost effective bridge widening that maintains local traffic, minimizes construction in the river in order to streamline the County /Army Corps approvals, provides continuous access to the Santa Ana River Bike Trails, maintenance and access roads, and can obtain NEPA approval. Utilizing our years of experience working on similar structures in the Santa Ana River, we will anticipate and plan for potential roadblocks, delivering a successful project for the City. Based on the most recent Bridge Inspection Report, as -built plans, and field review we have compiled a list of technical and institutional challenges expected on this project which will be investigated and resolved by the WKE team. A summary of these challenges is listed below, and our innovative approach to addressing them follows: • Bridge Alignment • Seismic Analysis Bridge Aesthetics Bike Trail • Environmental Documentation (NEPA /CEC!A) BRIDGE ALIGNIVIEINT"; An 18' -0" widening is required to accommodate four 11' -0" lanes, 4' -0" shoulders, and 8' -0" sidewalks with Type 26 barriers on the outside. WKE, studied the roadway geometry, right of way constraints and constructability of the bridge widening, and have developed three widening options with bridge and approach geometric alignments to accommodate left turn movement, in detail that provide geometric alignments that provide all current turn movements, ease bridge constructability, minimize river disturbance, provide continuous bike, pedestrian, and maintenance access, minimize traffic, impact and simplify future widening to six lanes. Option 1 The RFP described a symmetric widening option by adding 9' -0" widening along both sides orF existing Fairview Bridge. Constructing symmetric widening Will require construction of new pier walls in Santa Ana River, including reconstructing existing debris walls. There are several site constraints on Fairview Street that will affect the widening option. The existing bridge has a narrow width, providing a 3'- 6" walking path on each side. By constructing the widening on both sides, it will essentially eliminate the walking path, and close pedestrian access over the bridge during construction. To avoid this, the bridge construction will have to proceed in two phases, constructing one side in each phase. The split phase construction will require the construction be spread over two summers with a winter shutdown period in between. This will lengthen the construction period by at least six months. Debris walls sit at the leading edge of all seven pier walls.The construction alongthe eastside of Fairview will require these debris wall be reconstructed. If the City proceeds with the six lane project on Fairview in the future, a symmetric widening will require the debris walls be reconstructed again. If the future widening is completed only on the west side of Fairview Bridge, the asymmetric widening will result in about a 13' -0 wide shift in the centerline, and additional right -of -ways will be required. Thus in either case, the future widening will carry additional cost. The WKE Team has examined other options to alleviate the aforementioned issues. Two additional options were examined and presented herein. 12 1 Understanding of Neod Design Services for Fairview Street Fridge Rehabilitation KE 25C -18