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• <br /> 6 <br /> 4. Conduct one workshop with Public Works and other City Departments, to discuss <br /> stormwater options and determine acceptable solutions for managing stormwater runoff in <br /> the combined sewer areas. <br /> City Responsibilities <br /> 1. Provide available system GIS data and shape files for land use, zoning, topography, soils, <br /> groundwater elevations, separated storm drainage infrastructure, parcels, open space, and <br /> right-of-way. <br /> 2. Provide relevant findings from studies or designs for GSI alternatives in the combined sewer <br /> areas. <br /> 3. Coordinate and share information, as appropriate, from the Stormwater Plan updates that <br /> will be on-going during this project. <br /> 4. Host one workshop at City offices and coordinate attendance by appropriate Public Works <br /> and other City Departments. <br /> Assumptions <br /> 1. GSI alternatives for managing stormwater runoff within public right-of-way areas may consist <br /> of shallow infiltration, deep infiltration, and/or non-infiltration Best Management Practices, <br /> based on findings from the geotechnical evaluation of shallow and deep infiltration potential <br /> (Task 1900). <br /> 2. This task will coordinate and review all deliverables prepared by HWA relating to shallow <br /> and deep infiltration potential across the combined areas (Task 1900). <br /> 3. HDR will size proposed stormwater separation and GSI facilities in accordance with the City <br /> of Everett Storm water Management Manual and Design and Construction Standards and <br /> Specifications for Development. <br /> 4. Task 900 includes evaluating the effectiveness of CIP projects and Task 1100 includes <br /> evaluating their costs. This task will compare the cost-effectiveness of stormwater <br /> separation and GSI alternatives with the CIP cost-effectiveness information developed in <br /> those other tasks. <br /> 5. The methods to be used for modeling the cumulative, basin-scale effectiveness of optional <br /> updates to stormwater policies, ordinances, and standards, as well as stormwater <br /> separation and GSI projects in InfoSWMM will be developed as part of this task. The <br /> modeling of all alternatives will be conducted in Task 500. <br /> 6. Three meetings with the City will be held to 1) review available data and optional updates to <br /> stormwater policies, ordinances, and standards, 2) review proposed stormwater separation <br /> and GSI alternatives, and 3) review the results of the cost-effectiveness evaluation of <br /> stormwater alternatives. <br /> 7. One workshop will be held with Public Works and City Administration to discuss options and <br /> gain consensus on the types of policies, ordinances, and standards updates that will be <br /> acceptable for the project. <br /> 8. The budget for this task assumes that each stormwater workshop will last up to two hours <br /> and that a senior engineer will spend up to 8 hours preparing for each, including preparation <br /> of PowerPoint slides and/or coordinating graphical exhibits. <br /> City of Everett Comprehensive Sewer Plan Update 819 Scope of Services April 2011 <br />