The project included 51 bridge structures, plus retaining walls and ancillary structures.  Bridge types include prestressed concrete I-Girders, straight and curved steel plate girders, and segmental box girders. Dave Jeakle, Principal at Infinity served as Engineer of Record for six precast concrete segmental box girder bridges, on the 3rd and 4th level of the interchange; erected using the balanced cantilever method.  He was the Lead Engineer responsible for the concept development & detailed design of 51 structures on the project.  The services were provided during employment with URS from 2004 to 2009.