Expertise: Shaft Construction, Annular Pressure Grouting, MTBM (Microtunnel Boring Machine), Products Pipe Pressure Testing
Three construction workers wearing hard hats and high-visibility vests inspect a large, burnt, mud-covered cylindrical industrial component in a wet work area.

Zacate Creek WWTP to Chacon Creek Interceptor

Client: City of Laredo
Location: Laredo, TX
Status: In Progress
Contract Value: $24.9 Million
Trenchless Method: Microtunneling (MTBM)
Pipe Diameter: 60" Tri-Loc Casing | 42" Hobas FRP
Length Installed: 235 LF Casing | 6,200 LF FRP

Summary

• Install liner plate shafts (launch-22”, reception-22”)
• Install 235 LF of 60” Tri-loc casing using Micro Tunneling
• Contact grout annulus of 60” casing
• Install 6200 LF of 42” Hobas FRP casing inside 60” casing
• Apply cellular group annular space between product pipe and casing
• Construct 500 LF of aerial crossing
• Install manholes using open cut methodology
• Install sanitary bypass systems

Gallery

  • Crane lifts a long arm over a construction site with workers in safety vests near a circular excavation pit surrounded by fencing and dirt ground.
  • Inside a deep circular underground shaft under construction, with concentric metal rings, suspended hoses, and a orange-yellow work platform at the bottom.
  • Three construction workers in hard hats and safety vests stand around a large, rusted cylindrical industrial component suspended by a crane, partially submerged in muddy water.
  • Large muddy tunnel-boring machine cutter head with worn teeth, being moved by workers in safety gear.
  • Damaged large cylindrical metal machine part, broken with mud and debris, in a wet basement under a wooden ceiling.
  • Charred wooden ceiling with a large circular hole exposing dusty debris and damaged electrical conduit; soot and melted insulation around the opening.
  • Large circular metal formwork ring set in dirt at a construction site, with workers in high-visibility vests nearby.
  • Deep circular excavation shaft with rusted metal rings, scaffolding and a yellow duct hanging inside, water gathered at the bottom.
  • Rusted, orange-brown metal interior with a large cracked opening filled with charred coal and ash at the center.

PROJECT OVERVIEW

Big River Trenchless is supporting the City of Laredo’s wastewater infrastructure improvements through the installation of interceptor sewer infrastructure connecting the Zacate Creek Wastewater Treatment Plant to the Chacon Creek system. The project includes microtunneling operations, FRP sewer installation, aerial crossings, manhole construction, and sanitary bypass systems.

Key Highlights

  • 235 LF of 60-inch Tri-Loc casing via microtunneling
  • 6,200 LF of 42-inch Hobas FRP sewer installation
  • 500 LF aerial crossing construction
  • Sanitary bypass systems
  • Herrenknecht AVN800 and AVN1200 MTBM equipment utilized