Holdrege & Kull provided quality assurance (QA) services for construction of a new interchange at the intersection of State Highway 65 with Sunset Boulevard, between Roseville and Lincoln. The project involved construction of a cast-in-place, pre-stressed box girder bridge supported by cast-in-place concrete piles over Highway 65, requiring fills of up to 22 feet on the bridge approaches, on-ramps, off-ramps, and abutment areas. Approximately four miles of Highway 65 were repaved during the project, between the intersections of Blue Oaks Boulevard and Twelve Bridges Drive.
H&K’s QA services included density testing of fill material during placement using Caltrans test methods; sampling and testing of aggregate baserock to confirm compliance with project specifications; field sampling and laboratory testing of concrete during construction of cast-in-drilled-hole (CIDH) piers; field sampling and laboratory testing of concrete for the bridge girders, bridge deck, and bridge abutments; hot mix asphalt (HMA) testing during placement; laboratory testing of aggregate and sand products used in the HMA; and oversight of asphalt batch plant operations. H&K also coordinated laboratory testing of reinforcing steel for the bridge and QA testing of HMA samples. All field and laboratory tests were performed by Caltrans certified personnel from H&K.
To facilitate the contractor’s expedited schedule, H&K soil and materials testers performed laboratory tests on-site, allowing for faster turnaround time on field test results, which streamlined the acceptance of the contractor’s work by the construction management firm.