L.A. Gates Company - Logan Bridge No. 2

Description: This bridge carries two lanes of traffic on WV Route 17 across the Guyandotte River, existing WV Route 10, and CSX Railroad on a new alignment. The alignment includes two vertical curves, a +5% grade, and a horizontal curve.

Superstructure: This bridge has five spans, 230’-265’-265’-220’-205’ for a total bridge length of 1185’. The bridge framing is composed of a cast-in-place deck on 4 continuous steel plate girders. The deck is 32’-6” wide and 8 1/2” thick with concrete parapets. At the west end of the bridge, the girders fan apart to support a turn lane. Modular Expansion Dams were used to accommodate expansion and contraction in the bridge.

Substructure: The bridge piers have hammer head caps on solid concrete shafts. Two piers are supported on spread footings and two are supported by piles. The west abutment is supported on piles and the east abutment is on a spread footing.

Special Considerations:

The complicated geometry of the fanned girders challenged designers.
At the east end of the bridge, retaining walls join into each wingwall.
Pier placement was affected by clearances required around the highway and railroad that the bridge crosses.