H&H inspected the IH35 mainlane and frontage road bridges crossing Big Fossil Creek and prepared Bridge Condition Reports. Detailed repair measures for some creek crossings and designed and detailed two phased Frontage Road bridge replacements over Big Fossil Creek. Also contributed to two Mainlane bridge widenings over Big Fossil Creek. The team developed the structural design criteria, bridge layout, and detail sheet drawing templates.
In the proposal stage, H&H proposed design improvements to the schematic that optimized the DC bridge structures and reused some existing creek crossings, offering approximately $2M in construction savings. Once the team was selected, H&H continued investigating cost savings by examining various options to optimize span lengths, eliminate steel spans, and reduce the total number of spans.
Provided bridge design and detailing for the three Direct Connectors at the IH 35W/US287 Interchange. The superstructures utilize prestressed I-girders and curved steel plate girders, while the substructures include reinforced concrete hammerheads, straddles, and multi-column bents.
