6c Presentation Concourse C Power Center
Item No. 6c_supp Meeting Date: April 28, 2020 Concourse C New Power Center (CIP #C800724) Construction Authorization Project Scope Retrofit existing space to create a new electrical room Install new 3,200 amp electrical Power Center Install new 480V 1600 amp Switchboards Replace multiple obsolete electrical panels Restore fire zones, by transferring 4 loads from existing power centers to new power center. 2 New Power Center Location 3 Example of Similar Power Center 4 Example Obsolete Panel Replacement breakers not available failure will result in extended outage Meters not networked manual meter readings required Modules no longer manufactured cannot add new tenant services Budget Approved Expended Estimate at Budget to-date Completion Design $2.0M $1.3M $2.0M Construction $8.5M $0 $8.5M Total $10.5M $1.3M $10.5M 6 Schedule Commission Construction Authorization (Today) Q2 2020 Advertise for Bid Q2 2020 Construction Start Q1 2021 In-Use Date Q4 2022 7 RISKS Project Risk Budget/Schedule Impact Mitigation Plan Existing underground conduits Increase cost for redesign PCS small works project was may not be useable for new and construction of new executed and confirmed existing medium voltage feeders overhead conduits conduits are reusable 8+ months delay Existing Medium Voltage Additional retrofit of existing Collaborative evaluation by design trench T9 has potential code trench may be required to consultant, F&I, and Maintenance challenges bring it up to code staff to confirm proposed design. Poor as-built information of Potential for construction Greater level of design field congested area in and around change order due to investigation was performed the construction site unforeseen discovery. 8 Cost and Schedule Project Estimating Certainty We are here 33 DIVISION APPROVEDDIVISION APPROVED 44 AUTHORIZEDAUTHORIZED Degree of Uncertainty Managing Director Commission authorized design 55 approved Refine cost and schedule estimates up to 100% Staff level authorization for cost 10% 30% 60% IN PROGRESSIN PROGRESS 66 and schedule estimates design design design Commission Authorization COMPLETECOMPLETE Construction 9 Alternative 1 Maintain the status quo. Do nothing Cost Implications: An estimated $1,355,235 in costs to date will need to be expensed if this option is pursued. Pros: No additional capital cost. Cons: Does not provide electrical power for capacity growth of Concourse C. If no action is taken, the existing power center will operate at maximum electrical power capacity, increasing the risk of system overloading and power outages. This is not the recommended alternative. 10 Alternative 2 Install a new power center on the north end of Concourse C. Cost Implications: $10,500,000 Pros: This alternative will provide the best solution in providing additional electrical power capacity for future growth on all of Concourse C. This alternative will provide the following for Concourse C: Capacity for future growth; Robust/reliable distribution system; Infrastructure to support future tenant projects and airline utilization equipment on the north end; Re-establish the fire zones and eliminate a hazardous situation in the event of an emergency. Cons: Large capital project required to build out this new electrical infrastructure facility. This is the recommended alternative. 11 Today's Meeting Request Request authorization to: 1. Advertise and award Concourse C New Power Center Project for Construction 12
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