Taharoa Ironsand, King Country, North Island
December 31, 2000
Dredge support mining and relocation haulroad for BHP New Zealand Steel Mining at Taharoa
The initial contract beginning in early 1999 required DHML to excavate and cart a minimum of 25,000m3 of sand per week to either the mine face or the dredge path ahead of the mine face.
Also required were removal of vegetation and clay to dump, and maintenance of haul roads.
The majority of the work was carried out utilising a Cat 375 excavator and a fleet of D400D articulating dump trucks.
With an increase in production the fleet was upsized to an EX1100 excavator and 4 x 773B rigid dump trucks.
Support plant included D8K dozer, Cat 330 excavator and 14G grader.
In 2000 DHML constructed a 1km long x 20m carriageway transporter haulage route and 20m x 10m dry dock for BHP and Tranzcarr Heavy Haulage Ltd as part of the 2km relocation across site of the concentrator barge (1000 tonne), surge bin (450 tonne) & dredge (250 tonne).
The final value of the work was $3.4M and total volume moved was 1.4M m3.