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62 Morrill Way, Morgantown, WV 26505

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The Scotts Run Bridge is a single span bridge located just across the Monongahela River from Star City, West Virginia. It lies on Route 100 where Lazelle Union Road and Scotts Run Road intersect. The current bridge was designed by the West Virginia Department of Transportation in 1997 as an adjacent box beam superstructure with a span length of 88 feet. This report covers eight alternatives to be considered for replacement of the structure. The alternatives are as follows: • Flexible Buried Bridge • Two Prestressed Concrete Alternatives: o Four BIV-48 Spread Box Beams o Four AASHTO Type IV Girders • Five Steel Girder Alternatives: o Four Composite Rolled Beams with Partially Stiffened Web o Four Composite Plate Girders with Partially Stiffened Web (Homogeneous) o Five Plate Girders o Four Shallow Tub Girders (Suggested Option) o Six Valmont U33 Tub Girders After analyzing all the options, it was found that using four shallow tub girders was the most adequate for design. For the suggested option, the hydrological aspects, roadway components, and geotechnical situation were analyzed to create plans to implement phased construction. The group found that the existing abutments were sufficient to support the new superstructure; however, a raise in the beam seat is required. The group also found that doing a two-phase construction method would be the most adequate for the replacement of this bridge, with a detour rerouting Scotts Run during phase 2.

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