There are many different types and styles of short term bridges for Harvesting. Shown below is one example of a style which can be used on creeks and rivers which have relatively low bank heights and smooth beds with adequate bearing strenght. Bridge designs are done on a project basis. The design process usually involves a bridge site survey, hydrologic calculations, substructure design, super structure design, plan drafting, specification writing, and an engineering cost estimate. Permitting of the site and design may also be required. The bridge work may then be bid or built in-house.
Engineering Design Costs for bridges generally start at $1000.