6c Presentation Emergency Backup Water Supply
Item No. _6c_supp_ Meeting Date: January 22, 2019 Emergency Backup Water Supply Commission Meeting January 22, 2019 1 Emergency Backup Water Supply Request: Prepare design and construction bid documents Advertise and award construction contract Utilize Port Construction Services to perform work Background: Airport has no backup water supply for potable use/fire protection Airport's 2 million-gallon reservoir can supply water for 3 days If a water outage from Seattle Public Utilities is extended beyond 3 days, airport operations would be severely restricted. This project will develop the Tyee Golf Course Well into an emergency backup water supply for potable use and fire protection. Overview 2 Emergency Backup Water Supply Maximum 350 gal/min capacity Source water contains approx. 0.09 mg/L manganese Secondary MCL for manganese is 0.05 mg/L Well not connected to Port water system Existing well and pump house 3 Emergency Backup Water Supply Conceptual Design Emergency Backup Water Supply Design Start Q1 2019 Design Complete Q1 2020 Commission Approval (Construction) Q1 2020 Construction Start Q2 2020 Construction Complete Q3 2021 Asset in use Q3 2021 Project Schedule Emergency Backup Water Supply Design Cost (Estimated) $ 861,000 Construction Cost (Estimated) $ 1,878,000 TOTAL PROJECT COST $ 2,739,000 Costs Incurred To Date $ 75,000 Project Budget
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