The goal of this project is to create 3D model of bridge No. 06053 located on Old Pumpkin Hill Road in New Milford, CT.  This bridge allows vehicles to pass over the Housatonic railroad. The bridge structure is a 3-span continuous composite rolled steel beam bridge on concrete abutments and steel pier columns. The superstructure of the bridge consists of six steel girders and five steel diaphragms that support the cast-in-place deck. The substructure of the bridge has two pier columns, that consist of steel columns and bracings, that are responsible for distributing all the bridge loads. The 2018 Average Daily Traffic record for this bridge is 644,4% of which are trucks.  For this project, our team was required to use the inspection reports, as-built drawings, design codes, and sample calculations to create a 3D model and run a load rating analysis. Using MicroStation we created a 2D drawing of the superstructure (girders, end and intermediate diaphragms, deck) of the bridge and then imported it into MIDAS Civil 3D where we added the substructure (pier caps, pier columns, bracings) and then ran the load rating analysis. In this procedure, we were required to perform dead and live load calculations by hand and write up a load rating report that contains the results of our 3D analysis and hand calculations all of which were validated by our sponsor, who is a load rating engineer. Lastly, this project required the design of a new pier column section which was necessary to have bridge No. 06053 in compliance with section 1.3.7 Minimum Acceptable Rating Factors from the CT bridge design manual.