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<br />COMBINED SEWER CONVEYANCE PROJECT – SCOPE OF WORK CATEGORY 2 – FOR OFFICIAL USE ONLY / DISCLOSURE PERMISSIBLE BY LAW 7 <br />Task 300 Meetings <br />1. Attendance at Project Kick-Off Meeting. <br />2. Site Reconnaissance and Wetland Delineation Coordination Meeting. <br />3. Attendance by ESA at up to four project coordination meetings via video or teleconference. <br />Task 300 Deliverables <br />1. SEPA Environmental Checklist. <br />2. Critical Areas Report. <br />3. Cultural Resources Report. <br />4. Biological Assessment. <br />5. US Army Corps of Engineers permit application under Nationwide 12. <br />6. Ecology Section 401 Clean Water Act certification application. <br />7. Submittal for Ecology review of CZM compliance. <br />8. NPDES Construction Stormwater General Permit. <br />TASK 400 - BASIS OF DESIGN REPORT <br />The purpose of this task is to advance work performed in previous project studies to establish the location <br />of new structures and pipes, determine hydraulic characteristics of the CS bypass system including energy <br />dissipation at the Oxidation Pond recirculation channel discharge, set forth material and equipment <br />criteria and types, set forth foundation type(s) and criteria, and set forth structural, mechanical, electrical, <br />and instrumentation and control design criteria. Work performed under this task is as follows: <br />1. Prepare a brief description about routing the pipes beneath the access road to the northwest of <br />Diversion Structure 01 to avoid crossing through wetlands that describes why this route is not <br />constructable due to the large pipe crossings and significantly higher cost. <br />2. Perform a topographic survey of the area where structures and pipes will be constructed and prepare <br />a base map that includes: <br />a. Wetland delineation markers and high-water mark locations. <br />b. Geotechnical exploration locations. <br />c. Utility locations marked for geotechnical explorations. <br />d. Surface topographic features. <br />3. Conduct a trip with up to four staff to the project site for reconnaissance of applicable electrical and <br />control interfaces, meet with City staff regarding electrical and control standards, and reconnaissance <br />of the proposed routing for conduits. <br />4. Perform three-dimensional (3D) free surface computational fluid dynamics (CFD) modeling of the CS <br />bypass system to establish preliminary layout and design criteria for the structures and pipes. <br />a. Model the flow from DS 1 and the bypass constructed on existing Line C through the discharge <br />structure in the Oxidation Pond recirculation channel. <br />b. Identify the hydraulic grade line from Diversion Structure 01 through the CS bypass system, <br />configuration of the new diversion structure so that energy is dissipated and turned into the