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Vancouver Land Bridge

Vancouver Land Bridge
Vancouver, Washington

The Vancouver land bridge allows access from the north side of SR 14 and Fort Vancouver area to the south side of SR 14 and north side of the Columbia River. The bridge is approximately 40 ft wide and includes two spans approximately 100 and 90 ft long. The north and south abutments are 25 ft high and supported on spread footings. The two bridge decks are structurally connected at the abutments and center support. The center support consists of a 25-ft-high, 33-ft-long, 2-ft-thick pier supported on a 12.5-ft-wide, 48-ft-long spread footing. The maximum abutment load is about 1,500 kips, and the maximum center pier load is about 3,000 kips. Access to the bridge is provided by a series of retaining walls from several feet to about 25 ft tall; a portion of the south access ramp consists of a soil-nail wall of varying height. Stormwater collected from the bridge and access ramps is directed to new drywells located near the project. GRI evaluated subsurface conditions for the project and developed recommendations for earthwork; foundation design, including spread footings and drilled shafts; abutments and retaining walls, including soil-nail and MSE wall design; seismic design considerations; and infiltration rates for stormwater disposal.

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