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GTD Infrastructure

We build the high-voltage lines that carry power across the country.

Transmission lines move electricity over long distances at high voltage — anywhere from 69,000 to 500,000 volts. We build new lines, rebuild old ones, and upgrade existing corridors. Our crews can even work on lines that stay energized, so the lights stay on during the work.

Voltage
69 to 500 kV
Structures
Lattice · Steel · Wood · Composite
Work methods
Energized · De-energized · Bare-hand
Our scope
Roads through power-on
345 kV double-circuit corridor with 138 kV substation step-down
FIG— 01.A  ·  345 KV DOUBLE-CIRCUIT CORRIDOR WITH 138 KV SUBSTATION STEP-DOWN

High-voltage transmission, start to finish.

We build new transmission lines, rebuild aging ones, and upgrade corridors that need more capacity. Because our own crews handle every step — from grading the access roads to flipping the switch — schedule changes stay inside one company instead of bouncing between five contractors.
  • A

    New lines and rebuilds

    We build new transmission corridors from scratch and replace lines that have reached the end of their life. Because we handle the access roads and grading ourselves, weather delays stay manageable.

  • B

    Upgrading capacity

    When a utility needs to move more power on existing structures, we swap the old wire for higher-capacity conductor. Our crews can do this work on lines that stay energized, so customers keep their lights on.

  • C

    Storm hardening

    We replace wood poles with steel, strengthen anchors, and convert weak structures so the next storm does less damage. Work is scheduled around the utility’s planned outage windows.

  • D

    Access roads and site work

    Building a transmission line means getting equipment to remote places. We build access roads, lay matting over soft ground, and handle erosion control — all with our own crews.

How a project runs, step by step.

Every step happens inside one company — civil work, steel, electrical, and the controls that protect the system. All on the same payroll.
  1. 01

    Plan and prepare

    We survey the route, study the soil, help with environmental permits, order materials, and schedule our crews against the utility’s outage calendar.

  2. 02

    Access roads and site work

    Before any towers go up, our civil crews build the roads, lay matting where needed, and control erosion. This work stays ahead of the structure crews.

  3. 03

    Foundations

    We drill the shafts and pour the concrete that hold up every tower. Foundation work is sequenced so structures can be set on schedule.

  4. 04

    Setting structures

    Steel towers, monopoles, and wood poles go up — either by crane or, in tough terrain, by helicopter.

  5. 05

    Pulling and tightening wire

    We pull the conductor across the towers, tighten it to the right tension, and clip it into place. On lines that stay energized, we use special insulated tools.

Common questions.

The questions we hear most often from utility engineers, federal contracting teams, and developers.

Have a transmission project to plan?

We respond within two business days. For emergency, federal, and large industrial work, within four hours.

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