REconductoring CAse Study

ACCC® Conductor made it easy to double the capacity of the old line and save millions by completing the project ahead of schedule and without modifying existing structures.

Texas Utility Doubles Capacity, Saves Time and Money

American Electric Power (AEP) needed to increase the capacity of two parallel 120-mile 345 kV lines near the Gulf of Mexico to accommodate growing demand. The valley experienced tremendous population growth, causing record power demand in AEP’s service area. Making matters worse, the two 30-year-old transmission lines were the sole source of power to the region. The ambitious project required replacing the conductor on the two lines while energized.



Reduced line losses

34 MW

Generation Freed Up

$43 M

upfront cost savings


metric tons of co2 saved

Project Goals

Increase the capacity of the two parallel 120-mile 345 kV lines to accommodate growing demand

Meet their capacity requirements without modifying or replacing existing structures

Complete the upgrade while the line remains energized


240 Mi

of circuits

345 kV


1440 Mi

ACSR Drake Replaced

Conductor Size: ACCC® Drake

Project Features
  • Two 345 kV Tranmission lines running 120 miles
  • Five 345 kV substations
  • Designed to withstand hurricane winds and corrossive salt spray from the Gulf of Mexico


Award-Winning: Project awarded Edison Award, the electric power industry’s top honor, by the Edison Electric Institute.

Uninterrupted Service: A temporary single-phase line was designed in collaboration with AEP’s contractor to replace 240-line miles of conductor while energized, ensuring uninterrupted service.

Increased Efficiency: Use of ACCC® conductor nearly doubled capacity of the old line, and reduced sag .

Time and Cost Savings: Project completed 8 months ahead of schedule and millions under budget by maintaining the existing structures and keeping the line in service.

Line Loss Reduction: Freed up over 40 MW of generation capacity (cost estimate = $50M+)

Questions ?

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