Puyallup River Bridge Value Engineering Study, City of Tacoma
CivilTech participated on a multi-disciplinary Value Engineering Team to review and analyze key project issues and 60% design documents for the Puyallup River Bridge Replacement. The baseline concept included replacing Bridges F-16A and F-16B with a single tower, cable-stayed bridge system. The Value Engineering Team’s goals were to identify concepts to improve upon the baseline design, to reduce costs to bring the project within available funding, and to consider constructability and maintainability of the new structure. Project constraints and challenges included limiting bridge closure to one year, providing horizontal and vertical clearances for existing and future railroad tracks, impacts to BNSF and UP operations, complex right-of-way issues, connecting to existing bridges, and funding. The Value Engineering Team generated 21 ideas and advanced 5 concepts into formal recommendations, with proposed savings ranging between $0.74M to $4.6M. The recommendations included optimizing the project schedule to minimize impacts to rail road operations, utilizing cast-in-place construction with falsework in-lieu of the precast method, utilizing steel I-beam girders and lightweight concrete, stormwater conveyance improvements, and constructing a steel truss bridge with MSE walls and lightweight fill.