Specifications include, but are not limited to: preliminary engineering, geotechnical investigations, existing conditions, investigation and verification, and design development, as well as preparation, in close collaboration with the District, of a proposed price and schedule. An overview of the Phase One services consists of the following: • Develop the Project Work Plan, including Project schedule. • Produce the Design Documentation Report (DDR) and/or engineering report. • Develop the engineering design (including preparing and submitting intermediate design review packages) to a level agreed-upon by the District, with it currently being anticipated that such level will be 30 and 60 % design. • Perform value-engineering activities in conjunction with District staff. • Prepare a detailed project cost model, project schedule, and provide detailed cost estimates as the design and design alternatives are advanced. At a minimum, comprehensive estimates will be provided at the DDR, 30%, and 60% milestones.