Approval from RHE is required when using HDS-5 for culvert calculation forms, charts, and nomographs if using hand calculations for culvert design. However, the FHWA culvert design computer program HY-8 is the preferred WSDOT design method.
Approval from RHE is required when using HDS-5 for culvert calculation forms, charts, and nomographs if using hand calculations for culvert design. However, the FHWA culvert design computer program HY-8 is the preferred WSDOT design method.
