Underground Utilities and Horizontal Directional Drilling

GMT uses specially designed Horizontal Directional Drills (HDD) along with highly accurate drill bit locator systems to bore under obstructions such as parking lots, streets, buildings or streams without the need to excavate or trench up the entire distance. Often referred to as Trenchless Technology, HDD has much less impact to landscaping, yards, slabs, buildings, streets and rail lines.

Since the drill head can be steered underground, it is possible to make gradual changes in direction and depth to go around, over, or under pre-identified underground hazards such as existing Water, Sewer and Gas lines as well as Electrical, Telephone, Cable TV and/or Fiber-Optic lines.  A variety of products can be pulled back through the pilot bore hole once the pilot bore drilling is completed. These products include HDPE seamless conduit, Schedule 40/80 PVC joint conduit as well as rigid conduit, water line, Cable TV, Copper T-1 and Fiber-Optic lines.

At GMT we support:

  • Oil & Gas Well Monitoring, Control, Distribution-Controls, Power or Communications
  • Local or Long Distance Transport Conduits & Lines for Copper or Fiber-Optic Data, Telephone and Cable TV
  • Fiber-Optic Contractors
  • Cellular Tower Owners and Operators requiring additional backhaul or T-1 feeder lines
  • Plant infrastructure construction
  • Electrical Contractors requiring HDD Drilling, Trenching, Plowing and Support
  • Cable TV providers
  • Plumbing Contractors requiring HDD Drilling, Trenching Plowing and Support
  • IT Departments
  • ATM installation Contractors for Banks
  • Water Departments
  • Irrigation Installers
  • Security and Surveillance Contractors
  • Road & Street Paving Contractors
  • OSP Contractors that require HDD Drilling, Trenching Plowing and Support
  • Golf Course Maintenance Departments
  • Commercial & or Residential Builders and Developers
  • Homeowners & Ranchers 

Special Note-

Larger projects may require an Independent third-party Professionally Engineered and Stamped PE Plans in addition to the State Required 811 Line Locate or equivalent. Additionally, when other site-specific Permits, Plans, Surveys or Authorizations may be required by Federal, State and Local law, these services are at an additional cost to the clients. This normally does not include the 811 Line Locate Service.

In cases where Hydro-Excavation or Hydro-Vac of Drilling Mud and Spoils are required, a pre-approved disposal site shall be provided by the client or when no such disposal site is available GMT will locate and transport materials to a disposal site for an extra fee. GMT will provide client and controlling entities with all Material Data Safety Sheets (MSDS) for any drilling fluids used during construction. 

 Coming Soon:

  • Geo-Thermal HVAC Contractor Support
  • Aging Infrastructure Renewal
  • Pipe Bursting, Thrust Boring
  • Precision Grade Sewer Line Installation

Excavator Trenching

Uses specially designed chain excavators and track-driven backhoes to dig a trench from 6-12 inches wide down to a maximum depth of 60 inches. Typical reasons for excavation by chain trencher include: installing long runs of seamless pipe or conduit for data lines, telephone lines water, sewer, gas or fiber-optic lines through existing right of Ways or Utility Easements

A variety of products can be installed once the trench is completed. These products include HDPE Conduit, schedule 40 & 80 PVC conduit as well as seamless conduit, rigid conduit, water pipes, electrical conduit, telephone, T-1 and fiber-Optic lines. Once the products have been installed, the trench is filled back in along with special underground warning tape to warn future excavators of the buried lines. 

Road and or Stream Crossing

GMT utilizes HDD Drilling machines that can be steered underground and therefore can drill under a stream, creek, or road without any major excavation or diversion requirement.

Fiber-Optic Cable Installation and CableJetting

Sonet-ring fiber-optic cable installation is accomplished via high-pressure conditioned air driving a CableJet fiber blowing system. The cable is blown through the HDPE conduit with virtually no stress on the fiber-cable other than a low strain pushing force and high speed air from the compressor. By utilizing this method of fiber blowing or jetting there is little chance of any detrimental strain being imparted on the fiber optic cable. At GMT this is our preferred method over traditional cable pulling methods still in use.

At GMT we install the HDPE conduit as well as other types of conduit and blow in the Fiber to manholes , hand holes, vaults or buildings. Frequently it is possible to blow in fiber to a multi-story building from the street level upward.  Link to Sherman-Reilley CableJet   http://sherman-reilly.com/product/view/cablejet/

Conduit and HDPE Installation

Many products can be pulled back through the pilot bore hole once the pilot bore drilling is completed. These products include High-Density Polyethylene (HDPE )Seamless conduit, Schedule 40/80 PVC Joint conduit as well as Rigid metal conduit, Water line, Cable TV, Copper T-1 and Fiber-Optic lines.

Manhole, HandHole and Vaults Installation

Due to long cable or conduit runs it is often necessary to install Polymer Concrete, Fiberglass or PVC Manholes, HandHoles or Vaults for intermediate pull stations or splicing points. GMT utilizes either a conventional Trackhoe or Hydro-Excavation to excavate to or clean out existing hand holes or Manholes. Pricing to install or clean out these points varies due to depth, size and distance.

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