Emergency Backup Water Supply
Commission Meeting
January 22, 2019
1
Item No. _6c_supp_
Meeting Date: January 22, 2019
Emergency Backup Water Supply
Request:
Background:
• Prepare design and construction bid documents
• Advertise and award construction contract
• Utilize Port Construction Services to perform work
• 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
Existing well and pump house
• 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
3
Emergency Backup Water Supply
Conceptual Design
Emergency Backup Water Supply
Project Schedule
• Design Start
• Design Complete
• Commission Approval (Construction)
• Construction Start
• Construction Complete
• Asset in use
Q1 2019
Q1 2020
Q1 2020
Q2 2020
Q3 2021
Q3 2021
$ 861,000
$ 1,878,000
$ 2,739,000
$ 75,000
• Design Cost (Estimated)
• Construction Cost (Estimated)
• TOTAL PROJECT COST
• Costs Incurred To Date
Emergency Backup Water Supply
Project Budget
