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<br /> <br />SR 968/SW 1st Street Bascule Bridge over the Miami River <br />Miami, Florida <br /> <br />Client <br />FDOT District 6 <br />Adriana Manzanares <br />305.470.5283 <br /> <br />Completion Date <br />Final Design 2017 <br /> <br />Project Value <br />$ 80,000,000 <br /> <br /> <br /> <br /> <br /> <br /> <br />Serving as Lead Designer and Engineer-of-Record, Hardesty & Hanover designed the <br />new bascule span replacement and roadway reconstruction for the SR 968/SW 1st Street <br />Bascule Bridge. <br /> <br />The new 507-foot replacement bridge included a 315-foot (240 feet trunnion-to-trunnion) <br />double-leaf bascule span over a widened 125-foot navigation channel. Two new <br />approach spans (100-foot span on the west and an 88-foot span on the east), consists of <br />prestressed concrete beams providing at least 16.5 feet of clearance over North and <br />South River Drives. The bascule span roadway included an Exodermic concrete deck <br />providing protection of steel superstructure and a safer/quieter riding surface. The <br />bascule span operates with an electrical-mechanical gear train with a rack and pinion <br />drive, variable frequency drive motor control and relay logic. Project aesthetics are <br />incorporated into the bridge piers, walls, abutments, and a three-story control house. <br /> <br />Roadway reconstruction included upgrading the existing substandard typical section to <br />current standards through the project limits. A typical section in the new roadway has <br />three 11-foot traffic lanes, a 5.5-foot bicycle lane, and 2.5-foot shoulders. Traffic barriers <br />and pedestrian railing are included in the new bridge typical section. <br /> <br />The existing nationally-registered historic SW 1st Street Bridge is a 650.5 foot, 13-span <br />bridge constructed in 1929 is the gateway crossing into downtown Miami traversing the <br />lower segment of the Miami River, which is a working river due to its very active <br />commercial vessel usage. The four-lane one-way pair SW 1st Street Bridge (with the W. <br />Flagler Street Bridge) provides local eastbound access to downtown Miami from the <br />community of Little Havana and located within the City of Miami’s Greenway System. <br /> <br />Community involvement has resulted in a new bridge design that will be reflective of the <br />historic bridge and the adjacent South River Drive. <br /> <br /> <br /> <br />F-21