The work will be conducted in two phases: 1) Preliminary Design (30%) and 2) Final Design (100%). The project will only proceed to Final Design if there is a feasible and acceptable Preliminary Design. The Consultant will meet with the Project Team at each stage (Kickoff, Alternatives Analysis, 30%, and 100%) to discuss topics such as scope of work, methods, deliverables, and project timeline. The Consultant will prepare Opinions of Probable Costs for implementation, work with the Project Team to obtain permits and approvals, and prepare a construction bid package for the project. In addition to Friends of the Winooski River, the Project Team may include representatives from the US Fish and Wildlife Service, US Army Corps of Engineers, VT Department of Fish and Wildlife, VT River Management Program, VT Wetlands Program, VT Floodplains Program, and the Town of Cabot. The design will need to meet state and federal permit criteria. Preliminary Design The goal of this phase is to collect field data, analyze the data through appropriate models, and produce an alternatives analysis and 30% design for the best option to achieve project objectives. The Consultant will collaborate throughout this step with the Project Team as needed to ensure an acceptable final product. This step may involve a feasibility or alternatives analysis. 1. Data Collection: Survey limits shall extend a sufficient distance to define existing features related to the project site and provide sufficient information to complete a hydraulic analysis. Data collection will include, but is not limited to: 1.1. Review existing information provided by FWR along with other relevant resources. 1.2. Define channel morphology through geomorphic measurements, characterization of bed substrate, channel type, and condition. 1.3. Perform a channel survey documenting existing site conditions. This will include channel cross sections upstream and downstream of the structure and a longitudinal profile. The profile should extend 2,500 feet upstream to the point where channel stability increases and downstream to a distance of 20-30x the bankfull width. 1.4. Document infrastructure that may be affected by the project and other site features relevant to the design. 1.5. Conduct sediment probing and bank soil testing for potential contaminants. 1.6. Delineate wetlands adjacent to the channel throughout project limits.
