Item No. 10a_supp Meeting Date: July 8, 2025 Concourse HVAC Infrastructure Renew Replace Project (CHIRRP) Pre-Construction Services CIP C801265 Seattle-Tacoma International Airport Aging Infrastructure Impacting Critical Programs Airport Dining and Retail Restroom Renovations Passenger Amenities 2 Justification Growing number of AHU components across B,C, and D are failing. Results in Loss of Ventilation. • Failed components extremely difficult for Aviation Maintenance to replace due to space constraints • Leakage at cabinet penetrations • Leakage around doors/failed gaskets • Rust in cooling coil drain pans • Leaking pneumatic actuators 3 Project Scope • Full Replacement of existing air handling units (AHUs) • New penthouses to house new AHUs requiring structural and seismic upgrades to support. • Replace fire sprinkler heads and fire lines as require by code. • Ceiling Replacement • Integrated smoke control exhaust • New non-integrated smoke control exhaust units (for 2 Airline Realignment Project new AHUs - not capable of integrating) • AHU Programming • Replace Pneumatic Controls • Renew/replace utilities (ductwork, piping, Victaulic connections) • Add Emergency Power Connection (ATS) • Lighting Renewal (sustainability - less energy plus controls) • Heating coils will be sized to adjust to a lower temperature hot water - 4 Project Location Concourse B Total 5 AHUs Last Renovated 1991 AH01, AH03 and AH05 Refurbished in 2003 Concourse A Last Renovated 2001 (Not in Scope) Concourse C Total 8 AHUs Last Renovated 1991 AH01, AH02, AH05 and AH06 Refurbished in 2003 Concourse D Total 7 AHUs Last Renovated 1991 AH06 and AH07 Refurbished in 2003 5 ENERGY REDUCTION • Opportunity for energy reduction with HVAC refresh, efficient LED lighting, and updated lighting controls. • Compliance Evaluation with upcoming State of Washington Clean Buildings Performance Standards • Contribute to Century Agenda goals around energy efficiency, reducing SEA's footprint and lowering costs. 6 Project Schedule Major Milestone Estimated Date GC/CM Advertise Date Q3 2025 GC/CM On Board Q1 2026 30% Design Review Complete Q2 2026 Return To Commission - Full Design Authorization Q2 2026 90% Design Complete - Maximum Allowable Construction Cost (MACC) Determined Q3 2028 Return To Commission -Full Construction Authorization Q4 2028 Construction Phase Q1 2029 - Q3 2034 7 Cone of Certainty We are here 8 Project Budget - Authorizations CIP: C801265 Budget Estimate: $255M-$450M Previous Authorization: $7.25M Current Request: $ 11.00M Total: $18.25M (request + authorized) 9 Project Risks RISK / OPPORTUNITY DESCRIPTION PROB. IMPACT MITIGATION PLAN (R) Conflicts w/ existing conditions due to insufficient as-builts Concourses B, C, and D have gone through multiple renovations. M M Early collaboration with the GC/CM and design team will help to expedite on-site scans / investigations and keep impacts low. (R) Schedule elongation due to operational restrictions Gate outages will need to be kept to a minimum due to existing outages already planned for other projects. M M This requirement is being incorporated into the PDD and will be used to help phase the project. (R) Long lead materials could impact schedule Some materials (AHUs, penthouse assemblies, electrical components), could have extra long lead times in the current economic supply chain. L L Long lead materials should be identified as early as possible and procured by GC/CM so as not to impact the project schedule. (R) Cost escalation due to Cost spending on the project is several years out. tariffs and economic Escalation could impact the projected cost range instability due to tariffs and economic instability. L M Project is still at 15%, estimates should be refined as project design continues. 10 Requesting • Commission authorization for the Executive Director to advertise and execute a General Contractor, Construction Manager (GC/CM) construction contract and authorize pre-construction services. • The amount requested under this authorization is $11,000,000 for a total project authorization of $18,250,000. 11 QUESTIONS? 12