Trenchless Pipeline Rehabilitation and Design

When there are space constraints, environmental restrictions, or the inability to install pipelines using conventional trenching methods, such as installing a new pipeline across a freeway or under a waterway, trenchless technology becomes the only solution. Our engineers have planned and designed pipeline projects utilizing trenchless technology for more than 25 years and we have been ranked a Top 50 Trenchless Design Firm in the United States since 2013.

Trenchless Options

We carefully consider subsurface conditions and space constraints to determine the most effective trenchless pipeline:

  • Jack and Bore: Most common and least expensive; limited to relatively short lengths where groundwater is not a factor
  • Horizontal Directional Drilling: Capable of very long drill lengths and depths; can steer horizontally and vertically
  • Microtunneling: Capable of long drill lengths with high accuracy below water table
  • Cured-in-Place Pipe: Inverted/expanded fiberglass reinforced pipeline installed within existing host pipe, typically used to extend life of sewer/stormwater pipelines
  • Sliplining: Using existing host pipeline, can be cost effective when capacity reduction is not a concern and alignment does not contain sharp directional changes

Clients Served

  • Cities, including Anaheim, Carlsbad, Corona, Coachella, Encinitas, Escondido, Laguna Beach, Newport Beach, Oceanside, South Pasadena, Placentia, Poway, San Clemente, Solana Beach, and Vista
  • Water districts, including Coachella Valley, Irvine Ranch, Las Virgenes, Moulton Niguel, Olivenhain Municipal, San Dieguito, Rainbow Municipal, South Coast, Western Municipal, and Yucaipa Valley
  • Other entities, including Chino Basin Desalter Authority, Fallbrook Public Utility District, Leucadia Wastewater District, Orange County Sanitation District, San Diego County, San Elijo Joint Powers Association, Southern California Edison – Mountainview Power, University of California San Diego, Valley Sanitary District, and Victor Valley Water Reclamation Authority

Project Highlights

  • 30-Inch Effluent Transmission Main Microtunnel, Moulton Niguel Water District
  • Pipeline Rehabilitation Program, City of South Pasadena
  • Coast Highway Pump Station and Forcemain – Horizontal Directional Drilling, City of Encinitas
  • 84-Inch Plant 2 Primary Influent Rehabilitation Cured-in-Place Pipe, Orange County Sanitation District

What We Do

Our multidisciplinary in-house specialties allow us to provide efficiencies that maintain project momentum.
  • Alternative Analysis
  • Auger Boring
  • Bypass Pumping Design
  • CCTV Investigations and Needs Assessment
  • Condition Assessment
  • Cured-in-Place Pipeline
  • Horizontal Directional Drilling
  • Inadvertent Return (Frac-out) Planning
  • Inverted (sewer) Siphon Design
  • Microtunneling
  • Pilot Tube Boring
  • Pipe Jacking
  • Shoring Design
  • Site Constraints Analysis
  • Sliplining
  • Subsurface Conditions/Boring Analysis

Project Support

Curious how our passionate experts can help you DU more®? Get in touch!