As of May 17th, 2024, it is not expected that construction will begin before 2027. The Consultant's Scope of Work is expected to include, but not be limited to the following:
Consolidate and review existing project-related information, including lift station service area, projected demands, infiltration and inflow estimates, and lift station and force main as-builts.
Hydrologic and hydraulic modeling: review all existing available models and further develop or update them as needed or directed, including calibration using flow monitoring data and rating curve development. Provide a hydraulic analysis for a 20-year buildout plan in the wastewater collection basin served by Lift Station 15.
Develop a 10 percent Conceptual Design Report (CDR) for rehabilitation of Lift Station 15 and the force main up to the outfall.
Provide a surge analysis for the outfall manhole with the projected flows.
Provide an alternatives analysis for at least four different approaches to address future capacity deficits, redundancy issues, and existing equipment inadequacies. Alternatives shall include at least the following options:
Pump replacement, power, VFD, SCADA, and force main upgrades, as well as overflow abandonment
Conversion to Suction Lift Station and force main upsize
Conversion to Submersible Lift Station and force main upsize
Provide a Class 4 capital cost estimate for each proposed alternative.
Provide a feasibility assessment for each alternative, identifying the main hindrances to execution of the project, as well as strategies to address them.
Provide a non-monetary factors discussion addressing the operation and maintenance burden tradeoffs, along with other non-monetary considerations for each alternative.
Provide a 20-year net present value (NPV) for each analyzed alternative.
Provide a scoring matrix to compare the alternatives pros and cons using a weighted numerical method. Questions related to this solicitation may be directed to Sam Supowit, Wastewater Utility Engineer, ssupowit@shorelinewa.gov , or John Featherstone, Surface Water Manager, jfeatherstone@shorelinewa.gov. Questions via phone will not be accepted. Questions received after November 9, 2022, by 5:00 p.m. Pacific Local Time will not be accepted. Project Briefing Session October 27, 2022
Deadline for Written Inquiries November 9, 2022
City Evaluation of Submittals November 16-30, 2022*
Selected Interviews (if required) December 5-9, 2022*
Intent to Award January 5, 2023*
Contract Review and Approval January 16 , 2023*
Issue Notice to Proceed February 1, 2023* The method of contractor selection has not been determined at this time. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.
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