Assessment & Rehabilitation /

specialists effectively apply assessment and rehabilitation tools and techniques.

Our Sewer and Watermain Condition Assessment and Rehabilitation specialists effectively apply infrastructure condition assessment and rehabilitation tools and techniques to help municipalities and utility owners to maintain service, manage risks and achieve maximum asset life-cycle value. We engineer complete rehabilitation solutions for sanitary sewers, storm sewers, culverts, maintenance holes, watermains, maintenance chambers and other process pipings, secure agency approvals, prepare contract documents, procure the services of a suitable trenchless contractor and provide construction inspection and management services during construction and warranty periods.  Our services include:

  • Develop a project specific and balanced condition assessment strategy driven by risk exposure of the subject infrastructure
  • Develop sewer, watermain and maintenance hole cleaning programs, relevant detail designs with temporary access paths as required and complete contract document to secure an experience cleaning contractor to complete the cleaning work
  • Infrastructure condition field data collection using:
    • Indirect techniques such as visual assessments (zoom cameras, CCTV); multi-sensor tools equipped withPipe Penetrating Radar (PPR), Light Detection and Ranging (LiDAR), SONAR and CCTV; leak detection using acoustic principles
    • Direct techniques such as target area testing, Remote Field Eddy Current (RFEC) method, Ground Penetrating Radar (GPR) and Ultrasonic Testing
  • Field data review and condition assessment and rating of the infrastructure as per:
    • Water Research Center (WRc) Manual of Sewer Condition Classification program OR
    • National Association of Sewer Service Companies (NASSCO) Pipeline Assessment Certification Program (PACP)
  • Prepare complete condition assessment and rehabilitation planning report
  • Detail engineering of:
    • Pipe rehabilitation solutions including pressure grouting, chemical grouting, continuous pipe lining, short pipe lining, Cured-In-Place-Pipe (CIPP) lining, fold and form lining, compression fit lining, spiral-wound PVC lining, GRPsegmental lining, pipe bursting and shotcrete lining
    • Non-structural maintenance hole rehabilitation solutions to achieve the required performance against debris build-up, corrosion and in-leakage and infiltration due to external hydrostatic pressure
    • Structural maintenance hole rehabilitation solutions to achieve the required performance against live and dead structural loads, debris build-up, corrosion and in-leakage and infiltration due to external hydrostatic pressure
    • Temporary bypass systems (gravity and pumping)
    • Treatment systems where the process water is to be treated before discharging to the environment or municipal wastewater system
  • Preparation of drawings, technical specifications, cost estimates and complete contract documents.
  • Coordination and exchanging information with client and third parties& regulatory agencies
  • Environmental permitting
  • Resident engineering and contract management services
  • Construction quality inspection and certification
  • Risk management
  • Project management