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FYR <br /> Client Responsibilities <br /> 1. Provide documentation of the downtown areas that the City has determined could be <br /> separated. <br /> 2. Provide information on street improvements, redevelopment, or other proposed changes <br /> with the Port Gardner tributary basins. <br /> Assumptions <br /> 1. Treatment will need to be provided for stormwater separated from the combined sewer <br /> system. <br /> 2. Treatment of separated flows from the downtown areas, most likely currently tributary to <br /> PSO4, PSO5, and PSO6, will occur at Port Gardner Storage Facility. <br /> 3. Treatment of separated flows from the areas in PSO7 that will be diverted to Forgotten <br /> Creek will need to occur within the basin. <br /> 4. Cost estimating of separation will be developed under the cost estimating task. <br /> Deliverables <br /> 1. Draft and Final Potential Separation Opportunities TM (PDF format). <br /> Subtask 203 — Alternative Modeling <br /> Objective <br /> Use the updated and calibrated model to evaluate conveyance alternatives for the Port Gardner <br /> Storage Facility. Modeling will determine pipe sizing, maximum HGL elevation (transition from <br /> gravity to pressure flow), interim function during sequential implementation and flow changes <br /> (reduction) to waterfront lift stations. <br /> Consultant Services <br /> 1. Perform modeling analysis to evaluate alternatives identified in Task 400. The City's <br /> climate impacted rainfall time series will be used for system analysis. <br /> 2. Perform quality control reviews periodically through the alternatives analysis process. <br /> 3. Conduct a model workshop to review modeling results for the conveyance alternatives <br /> identified in Task 400. <br /> 4. Prepare exhibits summarizing the results of the model analysis. <br /> Client Responsibilities <br /> 1. Provide the most current climate change impacted rainfall time series for use in model <br /> analysis. <br /> 2. City staff will work with HDR to help identify which model alternatives to be evaluated. <br /> 3. Attend model workshop. <br /> City of Everett—Port Gardner Storage Facility 7 Scope of Services <br />