Laserfiche WebLink
<br />COMBINED SEWER CONVEYANCE PROJECT – SCOPE OF WORK CATEGORY 2 – FOR OFFICIAL USE ONLY / DISCLOSURE PERMISSIBLE BY LAW 8 <br />channel with minimal scour risk near the bank and training wall, as well not generating additional <br />hydraulic loading on the training wall. <br />c. Model the peak flow condition as worst case scenario. <br />d. Provide results of the CFD modeling work as a section in the Basis of Design Report. <br />5. Prepare a Basis of Design Report that includes: <br />a. References to prior CS bypass studies. <br />b. Describes the CS bypass configuration based on the pipe alignment selected by the City. <br />c. Hydraulic profile for the peak flow condition. <br />d. Sketches showing preliminary plans and sections of the diversion and discharge structures based <br />on CFD modeling results. <br />e. Size of conveyance pipes based on CFD modeling results. <br />f. Design criteria, including: <br />i. Design flow criteria. <br />ii. Process flow diagram. <br />iii. Hydraulic grade line at peak flow condition. <br />iv. Pipe material. <br />v. Access to structures and pipes for cleaning and maintenance. <br />vi. Structural, including building code, seismic, and foundation. <br />vii. Mechanical for gates and appurtenances. <br />viii. Electrical, including power distribution and lighting. <br />ix. Instrumentation and Control, including control description, interface with the plant control <br />system, and security. <br />g. Identification of the 25 year and 100-year flood elevations relative to the plant and project <br />components. <br />h. Opinion of probable construction cost based on the ROM cost analysis. <br />6. Conduct a meeting at the City’s facilities to present the Basis of Design Report. This meeting will be <br />attended in-person by up to three staff, with up to three staff attending by video conference. <br />7. Prepare cover letter and documents for submittal by the City to Ecology for their review. <br />8. Respond to comments received from Ecology. <br />Task 400 Assumptions <br />1. The City’s current topographic base map can be merged with the topographic survey map prepared <br />from Consultant’s survey to show the areas for electrical and instrumentation conduit and duct bank <br />routing. <br />2. The City will submit the Engineering Report, Everett WPCF Combined Sewage Conveyance <br />Improvements, January 17, 2022, Stantec, to Ecology for the Engineering Report required. <br />3. The City will provide Consultant with an AutoCAD file of the current plant liquid stream process flow <br />diagram. <br />4. New electrical and instrumentation and control will be services will be from the existing Primary <br />Facility. <br />5. No upgrades to Utility Transformer is required.