Corbett-Sugar-Quarry 500kV Transmission Line Construction Project

Corbett-Sugar-Quarry 500kV Transmission Line Construction Project

Corbett-Sugar-Quarry 500kV Transmission Line Construction Project

Type: Transmission
Scope: Constructed 68.3 miles of 500kV transmission line including 15 miles of construction through Everglade canal waterways.
Location: South East Florida

Client: NextEra Energy Resources

NextEra Energy Resources (a parent company of FPL) is a wholesale electricity supplier with a portfolio of facilities totaling more than 21,000MW of electric generating capacity in the United States and Canada. In January 2018, NextEra contracted Irby to construct 68.3 miles of 500kV transmission line (single circuit, triple bundled) between Palm Beach and Miami-Dade counties (Corbett and Sugar substations to Quarry substation) in support of a critical tie-in for the NextEra’s Florida grid.

The Irby scope includes site survey, clearing, construction of access roads and pads, pier foundations and anchor pile installation, and setting steel structure and deadends with approximately 15 miles of the construction right of way transversing protected Everglade canal waterways.

In observance of the projects environmental requirements Irby crews adapted novel technical solutions including the use of barges, concrete pump lines, and amphibious equipment.

Start Date: January 2018
Completion Date: May 2019

 

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Marshall Ford-Lago Vista 138kV Transmission Line Construction Project

Marshall Ford-Lago Vista 138kV Transmission Line Construction Project

Marshall Ford-Lago Vista 138kV Transmission Line Construction Project

Type: Transmission, Water Crossing
Scope: Performed a 14.5 mile 138kV transmission line upgrade including a 1.3 mile crossing over Lake Travis.
Location: Austin, Texas

Client: Lower Colorado River Authority

In March 2016, Irby Construction was contracted by the Lower Colorado River Authority (“LCRA”) to perform the Marshall Ford to Lago Vista 138kV Transmission Line Construction Project. The project scope included the replacement of a 1.3 mile transmission line across Lake Travis plus the upgrade of an existing 14.5 mile transmission line (69kV to 138kV).

Irby Construction successfully completed this project in April of 2016 to schedule and budget.

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Start Date: March 2016
Completion Date: April 2016

 

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

 

Eastern Alberta 500kV Transmission Line Construction Project

Eastern Alberta 500kV Transmission Line Construction Project

Eastern Alberta 500kV Transmission Line Construction Project

Type: Transmission
Scope: Performed a 100 mile 500kV DC line transmission line construction project.
Location: Alberta, Canada

Client: Alberta Transmission Company

The Eastern Alberta Transmission Line is a 300 mile 500kV overhead transmission line interconnecting the Newell HVDC static inverter plant near Brooks, Alberta with the Heathfield static inverter plant near Gibbons, Alberta.

Owned by ATCO Electric, a subsidiary of Alberta Transmission Company (“ATCO”), the ~$1.3B project further strengthens ATCO’s capability to transmit and distribute electricity to its 227,000+ customers in north and east-central Alberta, the Yukon, and the North West Territories.

Subcontracted via Quanta Services affiliate Valard Construction (Irby and Valard are both Quanta Services subsidiaries (PWR:NYSE)), Irby performed 100 miles of stringing through two sub-zero Canadian winter seasons to energize the project on time and to budget in December 2015.

To learn more about this project, click here.

Start date: August 2013
Completion date: February 2015

 

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Brown-Grady 138kV Transmission Line Rebuild Project

Brown-Grady 138kV Transmission Line Rebuild Project

Brown-Grady 138kV Transmission Line Rebuild Project

Type: Transmission
Scope: Performed a 20.2 mile 138kV transmission line rebuild project.
Location: Big Spring, Texas

Client: Sharyland Utilities

Sharyland Utilities (“Sharyland”) is a Texas-based electric transmission utility providing wholesale energy within the Texas Interconnection (~24 million customers) as regulated by the Electric Reliability Council of Texas. In April 2016, Sharyland contracted Irby to rebuild 20.2 miles of 138kV transmission line near Martin County, West Texas.

As subcontractor to McCord Engineering (Sharyland’s nominated engineering firm), Irby’s scope included the tear-down and reconstruction of the existing 138kV transmission line, including concrete and steel poles, between Grady and Brown Substations. Five OPGW splice cans were installed along the route and construction also included four highway crossings.

The project was completed on time, to schedule, and with zero lost-time incidents in October 2016.

Start Date: April 2016
Completion Date: October 2016

 

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

 

Ponderosa-Grimes 230kV Transmission Line Construction Project

Ponderosa-Grimes 230kV Transmission Line Construction Project

Ponderosa-Grimes 230kV Transmission Line Construction Project

Type: Transmission
Scope: Constructed 40 miles of 230kV transmission line including steel and concrete poles.
Location: Montgomery, Texas

Client: Entergy Corporation

Entergy Texas (an Entergy Corporation subsidiary) provides power to over 450,000 customers in 27 Texas counties. In September 2015, Entergy contracted Irby affiliate company Dashiell Engineering (Irby and Dashiell are Quanta Services subsidiary companies (PWR:NYSE)) to construct 40 miles of 230kV transmission line including steel and concrete poles between Entergy’s Ponderosa and Grimes substations in southeast Texas.

Irby Construction contracted Auger Services to construct the foundations and Winco (also a Quanta Services subsidiary company) to pull lead line and help clip the shield wire via helicopter.

This project was successfully completed in April 2016.

Start Date: September 2015
Completion Date: April 2016

 

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