Beginning with site preparation and ending with energizing, Irby constructs substations of all sizes.

Irby Construction Company has been involved in substation construction throughout most of the company’s existence. Projects have ranged from small distribution to larger 500 kV and 765 kV stations located throughout the United States and abroad.

Whether working with owner-provided design and procurement or providing turnkey engineering, procurement and construction services, Irby, offers quality delivery on even the most complex projects.

Our expertise is best suited to turnkey projects that consist of a combination of transmission lines and substations for a utility or independent power producer. Additionally, our vast experience makes Irby a natural fit for renewable interconnection.

For more information on this service or if you would like to request a bid, contact us. 


  • Two 230 kV substations in Nevada (design, procurement, construction and testing) were completed 11 months after signing the contract, including 216 miles of 230 kV wood pole H-structures.
  • Seven substations ranging from 92 kV to 230 kV in California (engineering, procurement and construction [EPC]) employing a combination of ring bus and breaker-and-a-half scheme with microwave for communication and SCADA.
  • Five 115 kV substations (EPC) in Belize, Central America, including 92 miles of 115 kV wood pole H-structure transmission line.
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