Emergency & Standby Power System Replacement, Generators 1-6

  • Emergency & Standby Power System Replacement, Generators 1-6
  • Emergency & Standby Power System Replacement, Generators 1-6
  • Emergency & Standby Power System Replacement, Generators 1-6
  • Emergency & Standby Power System Replacement, Generators 1-6


Client:  Chicago Department of Aviation

Location: Chicago, IL


The replacement of existing emergency and standby generators, as well as paralleling switchgear located at the Heating and Refrigeration (H&R) plant, required the construction of two new buildings, one to house the new emergency and standby generators and one to house the associated paralleling switchgear. It also required the replacement of transfer switches, upgrades to controls and providing standby power to loads not currently on the system.

The existing system consisted of oil-fired turbine generators, electrical switchgear, and automatic transfer switches, all of which were beyond their useful life and out of compliance with the Chicago Electrical Code. The project provides much-needed upgrades to keep systems in all terminals and airport support facilities online in seamless operation in the event of an emergency.

In addition to the six new generators, the following quantities of materials and equipment were installed: four miles of 6″ rigid conduit 500,000 feet of feeder conduit & medium voltage cable, approximately 150 new transfer switches, and 500+ new pieces of distribution equipment.

Services Provided

Our team provided a Contract Administrator and Resident Engineer for this project—providing managerial and clerical services to implement and enforce all applicable codes, standards, specifications, policies and procedures. With a full understanding of the project scope, plans and specifications, our team coordinated between the direct project assignment and other active Program assignments.

Preparing for the bidding process and contract awards, verified quantities from the project teams were accepted and pay estimates were prepared. Pre-bid meetings were held prior to each subcontract package being solicited, and Requests for Information were received and answered.

As contracts were awarded, all required paperwork was collected and reviewed. Paperwork at the start of construction, as well as at monthly payment intervals, included pay estimate submittals, sworn statements, subcontractor payment certification, M/W/DBE status reports, certified payrolls, canvass reports, partial waivers of liens, etc. Contracts, maintained in the CDA Computer Database (Prolog Converge), were set up by our team and administered throughout the project, including Contract Document review for Method of Measurement and Basis of Payment sections.

During construction, the following reports and documentation were prepared and submitted for approval: Resident Engineers’ Field Orders, Proposed Contract Modifications (PCM), Request for Contract Modifications (RCM), Line Item Changes (LIC) Inspectors’ Daily Reports (IDR), Daily Construction Reports (DCR—including non-conformance reports (NCRs) or Quality Deficiency Reports (QDRs)), and Field Orders for Time & Material work. The approvals of all the listed reports, as applicable, were tracked and secured.

Based on updates received during weekly project meetings (including DOA Construction Working Operations Group meetings: CWOG, and Short Term Operations and Phasing: STOP), the resource-loaded, Primavera-based CPM Schedule would be updated and analyzed regularly, comparing contractors’ actual work completed against anticipated milestones and the program master schedule. Continued compliance with sustainable requirements, soil erosion and conservation requirements, safety protocols (including FAA Part 139), the CM Quality Assurance Plan, and other contractual obligations was assured by Construction Inspectors. The ongoing development of as-built documents throughout the project was monitored by our team, as well.

With regard to subcontractor/supplier coordination and invoice/monthly payment request processing, Contractors’ invoices were reviewed for alignment with quantity measurements of units of work completed and compliance with Contract Documents. Any outstanding Requests for Information (RFI), Submittals (processed in hard copy with the FAA and EOR), Requests for Inspection of Materials (RFIM), and mechanics liens were tracked and processed, as well. This information, as well as audit of M/W/DBE utilization/certified payrolls and certificates of insurance, was compiled into the monthly contract close-out as well as the final project close-out documentation. Updates from the Pay Estimates were integrated with the project budgets in order to ensure that actual expenditures tracked with anticipated spending.