Waukegan Substation

Soil contamination and high water tables present challenges to substation design

Waukegan Substation Expansion
Waukegan, Illinois
Client: Exelon Corporation – ComEd

Project Highlights:

The expansion of the existing 345/138-kV substation increased load flow capacity as well as strengthened reliability of the regional transmission system.  Sargent & Lundy provided:

  • Transmission line engineering and design
  • Overhead transmission and distribution design
  • Equipment specifications and material procurement
  • Construction monitoring and quality assurance

Project Scope:

  • Equipment and facilities included:
    • Two (of ultimately four) 345/138-kV 300-MVA transformer banks
    • Seven breakers (14 ultimate) 345-kV GIS
    • 138-kV outdoor steel box structure with 138-kV breakers, 138-kV 115-MVar capacitor banks, 14 line positions
    • Four 345-kV transmission line reroutes
    • Fourteen 138-kV transmission line re-routes
    • Two new relays, controls, and communications buildings for the 345-kV and 138-kV yards
    • Fourteen remote-site substation relay and fiber upgrades
  • Site demolition engineering
  • Site engineering for contaminated soil and a high water table
  • Procurement support of major equipment, construction contracts, and minor materials
  • Outage planning and sequencing
  • Development of overall engineering/construction schedule
  • Onsite construction management team providing material tracking, QA/QC, site logistics, contractor and ComEd coordination, and interface with Waukegan station and governmental agencies
  • Development of operating procedures

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