Mangatangi River Rock Limited (100% owned by Hugh Green Group) produces washed, uncrushed river stones from coarse, greywacke-derived river gravel in the Mangatangi Valley using the most sophisticated fixed quarry plant in New Zealand.The quarry started producing aggregates in June 2006.

Mangatangi River Rock Limited is situated in Franklin District between inland Mangatangi and Kaiaua. The quarry is on the Firth of Thames and is approximately 10kms inland from Kaiaua.


The quarry produces a wide range of graded aggregates that are suitable for many applications including:

River & Stream Restoration	Decorative Walls	Parks & Playgrounds
Rip Rap	Decorative Concrete Pathways and Driveways	Gardens