Hunts Lane San Bernardino Associated Governments
San Bernardino, CA
HKA crews provided on-call construction staking services for the grade separation over the UPRR and improvements on Hunts Lane and Redlands Boulevard. In addition to railroad impacts, the area had many utilities including oil and gas lines.
The structure of the bridge is a single span, cast-in-place, post-tensioned, reinforced concrete box girder bridge, approximately 118 feet long and 74 feet wide. The total depth of the superstructure is 5 feet, 3 inches. This structure has 8 bays. It provides two travel lanes, a bike lane, and a concrete sidewalk in both directions. The bridge foundation consists of two abutments with 6.48-inch cast-in-drilled holes (CIDH) piles at abutment 1 and 2.84-inch CIDH piles at abutment 2. Reinforced concrete approach slabs were constructed on both sides of the bridge.
HKA provided survey control, RFI’s, grid grade calculations, rough grade stakes, final grade stakes, ground and superstructure stakes, MSE wall stakes, drainage structures, right of way flagging, slope stakes, cut and fill stakes, cross sections, curb and gutter, operating within Railroad R/W, and set final right of way monumentation at the completion of the project. HKA staff completed the post-construction Record of Survey.
HKA staff complied with Caltrans Construction Manual, Caltrans Survey Manual, Caltrans Safety Manual, Caltrans Code of Safe Surveying Practices, and Caltrans traffic control procedures. HKA’s daily record keeping and field notes were in conformance with Caltrans procedures. Work was performed with HKA’s Trimble R8 RTK GPS base, Rover, and Receiver, Leica TPS 1200 Reflectorless Total Station.