From our humble beginnings in 1970 as a company consisting of two men and a single trencher, Underdown Trenching has grown into a turnkey operation, specializing in telecommunications construction & installation.

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Our Services

    • Directional Boring Machines

    • Excavators/Backhoes w/ Breaker Attachments

    • Hydrovacs

    • Hard Surface Core Drills

    • Larson Trailer

    • Reel Trailers

    • Air Compressor

    • Bucket Trucks

    • Climbing Gear

    • Bucket Trucks w/ Splicing Trailers

    • Single and Mass Fusion Splicers

    • OTDRs

    • Coaxial Splicing Tools

Current Service Areas

  • St Louis City

  • St Louis County

  • Jefferson County

  • Franklin County

  • Crawford County

  • Washington County

  • Phelps County

  • St Charles County

  • Warren County

  • St Francois County

  • Madison County

  • Ste Genevieve County

  • Iron County

Contact Us