8b. Presentation

Dearator and Condensate System Upgrades

Item No. 8b_supp
Meeting Date: April 18, 2023
Deaerator (DA) and Condensate System
Upgrades (Hot Project)
Joe Cook                           Matthew Piccolo
AV F&I – Mech. Engineering Manager      AV PMG – Capital Project Manager

                 Project Overview
Project replaces old heating system
components in SEA’s Central Mechanical
Plant that supply space heating and
domestic hot water heating throughout
concourse areas, and replaces old secondary
air compressor needed for redundancy.
Requesting Commission Authorization for:
•  Design and construction of secondary air
compressor portion of project,
•  A project specific designer for removal
and replacement of tanks and pumps,
•  Approval of total revised project budget
of $14,656,000 (a $4.8 million increase)

                   Project Scope
•  Replace deaerator (‘DA’) tank, steam
condensate tank, blowdown flash tank
•  Install new feedwater pumps with
energy-efficient variable frequency
•  Remove Boiler Room air handling unit
and three old air compressor systems
•  Install new secondary air compressor
in Mechanical Room 211 (discretionary
change, added from small works

Milestone                                                                 Date
Commission Authorization for Design                                             Q2 2023
Commission Authorization Construction – Air Compressor                         Q2 2023
Commission Authorization Construction – DA & Condensate                       Q3 2025
Notice to Proceed – Secondary Air Compressor                                    Q4 2024
Notice to Proceed – DA & Condensate Tanks                                      Q4 2025
Substantial Completion – Air Compressor                                         Q4 2025
Substantial Completion – DA & Condensate                                      Q1 2028


Cost Estimate                   Capital                   ERL                       Total
Status 2 Estimate (2020)                $9,805,000               $220,000                 $10,025,000

Revised Project Estimate (2022)        $14,444,000              $212,000                 $14,656,000


                 Cone of Certainty

We are here:
Notebook Development,
IC Approval,
Commission Authorization


                Action Requested
•  Increase project budget by $4,851,000 for a total revised budget of $14,656,000
•  Execute a professional services contract for design services
•  Prepare design and construction bid documents for the Deaerator and Condensate
System Upgrade project
•  Advertise and execute a major works construction contract for the secondary air
compressor portion of the project
•  Authorize the use of Port of Seattle Crews for pre-construction activities





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