Tri-State was responsible for the design for the referenced two dual structures. The design alternatives were for a 3-span continuous steel multi-girder with two end spans of 97’ and a center span of 163’ for a total length of 357’. The second structure is a single span multi-girder bridge having a span of 162’. Tri-State was responsible for the total design involving the construction of the multi-lane limited access highway, including the preparation of ROW plans, stormwater management, MPT, and pavement markings. A subconsultant performed the geotechnical investigation.