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Assumptions
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Port Area500acres
Approximated from sketch of new floating port
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Single Terminal Area75acres
Approximated from current port of Seattle
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Costs Similart to SR-520 Bridge:
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Overall Cost4510000000$
http://www.wsdot.wa.gov/Projects/SR520Bridge/Budget.htm
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Float Costs per pontoon11454545$
http://www.seattlepi.com/local/transportation/article/Construction-to-start-on-the-new-520-floating-3441908.php
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Area of comparable structures
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Entire SR-520 Floating Bridge34.51acre
https://www.wsdot.wa.gov/Projects/SR520Bridge/About/BridgeFacts.htm
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Large SR-520 Pontoon0.62acre
https://www.wsdot.wa.gov/Projects/SR520Bridge/About/BridgeFacts.htm
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Cost per acre
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Full Bridge130695286$
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Pontoons18480000$
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Best case scenario is the 500 acre port multiplied by the pontoon only cost per acre
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Worst case scenario is the 500 acre port multiplied by the total SR-520 bridge cost per acre
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ScenarioBest Case Scenario
Worst Case Scenario
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Full Floating Port9.2465.35$ Billions
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One Floating Terminal1.399.80$ Billions
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