To facilitate rehabilitation of the Bureau of Reclamation’s fish bypass facility in Tracy, California, NCI performed structural engineering design for support of temporary construction loads. The work consisted of a structural analysis of the existing facility and, where needed, design of crane bearing pads for safe transfer of anticipated temporary construction loads while the contractor (Harbor Offshore) replaced the intake ducts. Fabrication drawings and the finite element structural calculations were submitted to the Bureau of Reclamation for their approval prior to site mobilization.

NCI analyzed potential channel erosion at the new Murray Bridge overpass of the San Luis Rey River, and evaluated the new bridge’s stabilizer structure. Based on an evaluation of the existing conditions and on the available fluvial and flood data, it was determined that emergency mitigation was required to reinforce the existing grouted quarry stone stabilizer structure.

NCI performed the engineering design, and prepared the construction drawings, specifications and contract documents in order to lower the existing stabilizer toe protection by an additional 15 vertical feet and widen the structure by an additional 60 horizontal feet for its entire 600 lineal feet across the river’s channel width fronting the Murray Bridge.

NCI also provided full time resident inspection and construction management services during construction. A major dewatering system was installed by the contractor in order to significantly lower the water table across the river’s channel during construction.