NBH – Slot Drainage works

Project Name: NBH – Slot Drainage works

Client: Ferrovial York Joint Venture

Value: $6M

Location: Warringah Road Frenchs Forest

Commencement: June 2019


Install stormwater, groundwater and subsoil drainage to base of Warringah Road Slot carriageway.


  • Excavation of trenches
  • Laying and backfilling of stormwater(3km), groundwater(2.5km) and subsoil pipe(6km)
  • Install of precast pits( >100No.) including extending pits to final level
  • Connection of groundwater strip drains to groundwater pipes
  • Works completed in accordance with RMS specifications
  • Co-ordination with other road building Subcontractors