Waitohu Quarry

GBC owns a Quarry on Waitohu Valley Road, near Otaki. We produce a wide range of graded aggregate for Domestic, Farm and Roading use.

With an explosion in demand for our Roading Aggregate, supplying to the M2PP, PP2O, and Transmission Gully projects, the recent upgrade of the fixed plant was timely. The upgrade now sees 4 times the amount of aggregate being made, control features also added. This enables the plant to produce grades of metal that meet strict New Zealand specifications. An independant Labourtory tests these metals regulary.

Permanant Machinery at the Quarry include:

  • CAT D8 Dozer
  • CAT 345 Excavator
  • 2 x CAT 740B Dump Trucks
  • Terex Pegson Mobile Rock Crusher
  • Powerscreen Warrior Mobile Screen Plant
  • Fixed Jaw Crushing Plant
  • Hyundai HL760-7 Loader

Our Hyundai Loader has onboard scales ensuring you get the exact quantity you want as well as ensuring your trucks or trailers are not overloaded.

Where are we?

Our quarry is located on Waitohu Valley Road just north of OTAKI. Turn off SH1 at Manukau South Road or Waitohu Valley Road.

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Aggregate Range available:

Top Coarse:Top layer of driveways and paths, comes in blue or brown
Running Coarse:Top Layer of roads, a harder stone for heavier traffic
Base Coarse (AP40 & AP65):NZTA Specification. Larger stone to form the base of roads
M4 Base Coarse:NZTA specification grade base metal for roads
Face Metal:used as fill
Ornamental & Shot Rock:Used in Landscaping
40mm Ballest:Landscaping and drainage
70mm Ballest:Landscaping and drainage
Cow Race Metal:Processed or unprocessed availiable. We can also add burnt lime to the mix to improve the stability and lifetime of the race

D8 Bulldozer

Hyundai Loader


22 Waitarere-Hokio Road
Waitarere Beach
RD 4
New Zealand

Google Map