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  • Monroe Substation - construction


Project Highlights:

  • Construction of a new fuse shunt capacitor group at a 500 kV substation
  • Installation of five (5) 500 kV power circuit breakers and two (2) 230 kV power circuit breakers
  • Installation of relay protection and SER/SCADA equipment
  • Installation of two (2) three (3)-phase capacitor banks
  • New dead-end structures installed
Monroe Substation Integration - construction
Monroe Substation

Project Summary

Client: Bonneville Power Administration
Location: Monroe, WA
Services Provided: Construction Management & Inspection
This project consisted of construction of a new fuse shunt capacitor group in a 500 kV substation with a maximum output of 386 MVAR at 550 kV and consisting of 23 parallel strings with 14 series units of 200 KVAR, 22.3 kV per phase.
Two (2) three (3)-phase capacitor banks were installed consisting of 1,188 total capacitor units on free-standing insulated steel structures within a secure fenced area. Additional work included installation of five (5) 500 kV Power Circuit Breakers, two (2) 230 kV Power Circuit Breakers, and various circuit switchers and disconnects switches. 500 kV Air Blast Breakers were removed and various relay protection and SER/SCADA equipment were installed. One (1) box-style dead-end structure and one (1) lattice dead-end structure were installed to route the line to the new equipment.
MacKay Sposito led Safety and Quality Assurance efforts on-site which included stakeholder coordination, information management, project controls, and contractor compliance to specifications and contractual obligations. Schedule management was the key to success due to highly-constrained outage schedules.