Final Design
Final Design Components:
Overview
The final design is a 40 ft span prefabricated beam bridge with a deck width of 14 ft and a depth of 3.2 ft, that will tie into the existing road. This structure has a design life of 75 to 100 years, an estimated time of construction of 1.5 days, and a total cost estimate, including the bridge structure, sills, geotechnical work, and structural engineer, of a little over $55,000.
The under-bridge stream corridor was iteratively designed to minimize the span of the of the crossing while also maximizing hydraulic capacity and streambed stability.
This design conveys the 10-year discharge of 525 cfs without overtopping, maintains the natural stream bottom to allow for aquatic organism passage, and has ample load capacity to ensure safe passage for vehicles.
Final Design Drawings
Floodplain Regrading and Planting Plan
