Vermont Transco owns and manages Vermont’s high-voltage electric transmission system (115 kV and above) and provides service to Vermont’s 17 electric distribution utilities and utilities in New Hampshire and New England.

In October 2010, Vermont Transco contracted Cianbro Construction to build 53 miles of 345kV transmission line including the relocation of existing 345kV and 115kV interconnection line as part of the Southern Loop transmission line project.

As subcontracted to Cianbro Construction the Irby work scope included the direct embed of wood H-frame structures, steel monopole structures on anchor bolt foundations, twin bundled conductor, and two static lines in mountainous terrain. The project was completed on schedule and with zero lost time incidents in October 2010.

Start Date: February 2010
Completion Date: October 2010

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If you would like to request information on this project or submit a request for bid, click here. 

The Georgia Power Company (“GPC”) (a subsidiary of Southern Company) provides electricity to over 2.3 million customers in 155 of Georgia’s 159 counties.

In July 2015, GPC contracted Irby to construct 47 miles of 500kV transmission line along existing right-of-way to further the capacity of its expanding nuclear infrastructure. Beginning at Plant Vogtle in Waynesboro and ending at the Thomson Primary substation, construction of the transmission line was completed and energized in April 2017 in anticipation of two new nuclear units at the Vogtle site.

The units will generate enough emission-free electricity to power approximately 500,000 homes and businesses.

Learn more at the Georgia Power Company project page.

Start Date: July 2015
Completion Date: April 2017

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If you would like to request information on this project or submit a request for bid, click here. 

In March 2010, the Lower Colorado River Authority (“LCRA”) (one of the largest wholesale power utilities in Texas) contracted Irby to construct the Clear Springs to Hutto Transmission Line. The project scope consisted of 88 miles of 345kV new transmission line construction with approximately 160 circuit miles of bundled conductor on lattice towers and steel poles.

Irby executed the project to schedule with assistance from fellow Quanta Services (PWR:NYSE) subsidiary company Can-Fer Utility Services, a specialist in the construction of electrical and substation infrastructures including foundations and directional drilling. The project also benefitted from the use of helicopter assisted stringing in preservation of environmental right of way and overall schedule maintenance.

To see Irby at work on this project, watch this local news story.

Start Date: March 2010
Completion Date: February 2011

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If you would like to request information on this project or submit a request for bid, click here.