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  • Construction Inspection


Project Highlights:

  • Upgrades to two (2) main substation and five (5) satellite sites
  • Site development and 500 kV substation equipment installation
  • Installation of Remedial Action Scheme, data, relaying, and control systems
  • Fiber optic routing and associated interconnection wiring
  • Cable trench installation
Substation construction

Project Summary

Client: Bonneville Power Administration
Location: Walla Walla County, WA
Services Provided: Construction Management & Inspection
This project provided upgrades to two (2) main substations and five (5) other satellite sites operated by multiple entities.
The construction effort included site development (such as grading, drainage, and yard fencing) and the installation of 500 kV substation equipment. Additional work included cable trench installation, indoor house switchboard rack installation/modifications, control battery and charger upgrade, Remedial Action Scheme systems, data systems, relaying and control systems, fiber optic routing, and associated interconnection wiring for the systems.
MacKay Sposito led safety and quality assurance efforts on-site and provided stakeholder coordination, information management, project controls, and contractor compliance to specifications and contractual obligations. We also coordinated repair efforts for defective equipment from the international vendor.