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Fairview Street Bridge Rehabilitation <br />RFP No, 14-001 <br />Option 3 <br />Option 3 that we developed widens the bridge <br />18' -0" on the east side of the existing structure <br />to provide four 11' -0" lanes, 4' -0" shoulders <br />and 8' -0" sidewalks. Similar to option 2 above, <br />the construction can be staged to maintain <br />pedestrian access at all times. Option 3 maintains <br />the curb line at the southeast corner and aligns <br />northbound traffic with the 171h Street intersection. <br />(See Exhibit C) An east side widening requires the <br />existing debriswallsbe re- constructed underthe HBP <br />funded safety project, which will result to a higher <br />n <br />�4 3 <br />cost project and higher local match required for the <br />safety project. The interim alignment for option 3 <br />requires a longer transition towards 171h Street and <br />creates an awkward shift in the southbound lanes <br />to accommodate the northbound left turn to West <br />16 1h Street. The southbound approach transition to <br />the bridge will require a longer approach sidewalk <br />construction, or additional bridge barrier end <br />treatments. In the ultimate 6 -lane condition, the <br />westward centerline shift maintains the extra wide <br />sidewalk on the southeast corner, and will further <br />encroach into the park. (See Exhibit D) <br />Exist- PROPOSED <br />t C1 <br />041 <br />Z6' 9' <br />8' , 4,r 11' 11' <br />ii <br />REHABILITATION WIDENING —• <br />Option 3 -- East Rehabilitation Widening: shift centerline 9' -0" east and reconstruct debris wall. Future <br />ultimate widening would not touch debris wall, <br />35' <br />Each of the three potential rehabilitation widenings <br />have unique benefits as shown in the table below. <br />Options 2 and 3 have shorter construction durations <br />which minimizes traffic congestion and construction <br />support costs. Where these options shine is when <br />Life Cvcle Cost Analysis i Higher <br />Bike Trail Detours Two Seasons <br />viewing the rehabilitation as part of the larger <br />ultimate six -lane bridge vision by the City; these two <br />options have reduced life cycle costs and minimize <br />impacts to the nearby park. <br />Low low <br />One Season One Season <br />to ark None now,26'Take later * b' Take now, None later None now,12''rake later <br />1 b 1 Understanding of Need Design Services for Fairview Streot Bridge Rehabll'vtation A �, <br />25C -22 <br />