Kaimai Tunnel


Client Kiwirail
Location Kaimai
Duration On-going
Services Contaminated Works

CLL have completed a diverse scope of works over the last three years on behalf of Kiwirail for the Kaimai tunnel, this being:

  • Bulk cleaning of contaminated material
  • Development, supply of grout and repairs of slabs
  • Bulk cleaning of areas
  • Replacement of drain covers
  • Investigation coring in the wall and floor of the tunnel
  • Micro piling within the tunnel
  • Assistance with the enabling of the slot drain
  • Ongoing monitoring/cleaning of contaminated material
  • Assistance with air monitoring and development of alternative/enhanced work practices
  • General investigation of items in the tunnel


At the peak of our operations, we were proactively working with six organisations to enable a crew of 40 plus personnel which delivered five different operations in each shift.