Case Study – Bridges Arsenal Bridge Rock Island, IL, 2009-2010Arsenal Bridge - General Characteristics • Constructed 1896, Steel Through Pratt Truss, 8 Spans • Combined Two Lane Highway-Railway Structure • Length: Rail (Spans 1-8)1,848 ft, Vehicle (Spans 2-6) 1,556 ft • 360° Swing Span 2: 336 ft, 2,000 Tons • Swing Span Average Turn Time: 12 Min • Traffic: Rail 1,881/yr, Vehicle 10,297/day, Barges/Boats 18,568/2,884/yr 2Arsenal Bridge – Struct

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