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  • Intren workers fix an underground problem

Underground Electric

INTREN is an award-winning WBE specialty contractor that serves the nation’s largest utilities, private contractors and developers, municipalities, and cooperatives. Every project we do is completed with a keen focus on safety and quality.

Though our work usually varies in size and scope, INTREN crews specialize in turnkey, custom electric utility solutions for large-scale design/build ventures. From overhead and underground installations and repairs to ongoing maintenance, design, and upgrades, our experience allows us to expertly provide crucial services to customers.

Our Underground Capabilities Include:

  • Underground residential distribution (URD)
    • Trenching, plowing, boring, and terminating services
    • Main line trenching, setting, terminating, and livening
    • Street lighting
    • Turnkey cable replacement
    • High voltage
    • Maintenance
  • Heavy underground network systems
    • Manhole and duct installation
    • Manhole structural and electrical inspections
    • Cast-in-place manholes and vaults (new construction and complete replacement)
    • Manhole roof and wall replacement
    • Vault roof repair and replacement
    • Cable pulling and splicing
    • Flagging, shoring, frames, and covers
    • Manhole pumping and cleaning
    • Maintenance
    • Facility relocation
  • Distribution fault repair
    • Turnkey fault repair program that includes work planning, excavating, repairing, switching, and restoring primary, secondary main, service, and street light fault types
  • Directional boring
    • Direct cable installation
    • Cable and conduit poly pipe installation

Other Electrical Services:

  • Transmission
  • Substation
  • Overhead distribution
  • Storm and emergency response
  • Specialty services

Featured Project


INTREN completed construction for a capacity expansion project in a major city that required the installation of a new 12 kV underground line. This entailed 155 splices in nine underground 12 kV feeders and 55 manholes. Each of the project’s tasks was dependent upon the successful completion of the previous one and resulted in the need to create new maps, as the maps used prior became inaccurate as the project progressed. INTREN was awarded this project due to our ability to manage its complexity and quickly offer innovative solutions.