The Consultant shall perform consultation, research, professional and technical services required for Bridge Design and related Project Development and Construction Support Services, on an “as-needed” basis to support the Department of Transportation (Caltrans), Division of Engineering Services, Bridge Design Program, District 59, from O phase to 3 phase in the development, design and construction of proposed Caltrans transportation facilities. The Caltrans Contract Manager shall assign specific work to the Consultant to assist the Caltrans work force through the issuance of Task Orders describing in detail the services to be performed. The Consultant shall only perform work that is assigned in an authorized Task Order. The Contract does not guarantee that a Task Order shall be issued. The Consultant may provide services to Caltrans including, but not limited to, engineering studies producing Project Development and Design products and deliverables to support the preparation of the Project Report (or project report equivalents), Project Approval Report, developing design plans, Specifications and Estimates (PS&E), virtual design model, bridge load rating (to be completed within the term of the Task Order when the Task Order includes modification of an existing structure that directly results in the need for an updated load rating analysis and the load rating analysis work is specifically listed in the Task Order); support to the Caltrans Structure Office Engineers during project Advertisement and Award; project history files; and design support during the construction phase. All design tasks including, but not limited to, highway bridges, railroad bridges, earth retaining structures, underground structures, sound walls, overhead sign structures, bridge railings and transitions, cable-stay bridges, suspension bridges, movable bridges, ferry boat bridges, segmental bridges, arch bridges, tunneling, high-end analysis, and accelerated bridge construction may be assigned as work under this contract. The Contract shall be Task Order driven and shall have a five (5) year duration, with Project Development related tasks performed within the first 36 months and Design Support for Construction related tasks to continue through the remaining duration of the Contract. No project development related tasks will be assigned after the first 36 months of the Contract.