DEEPENING OF PORT TARANAKI BY BACKHOE DREDGE

In 1981 approval was given for Port Taranaki to be developed to handle hydrocarbons and allied petrochemicals produced from the Taranaki oil and gas fields. To accommodate larger tankers and reduce dependence of shipping movements on tides, the draught of the tanker berths and entrance fairway is being increased from 9.15 m to 11 m. This requires the removal of 747,400 cu m (measured in situ) of sands, silts and rock fragments ranging from gravel to very large boulders. Dredging is carried out by the Taranaki Harbours Board using a Liebherr 991 backhoe mounted on a three legged pontoon, two 150 cu m capacity dumb (without propulsion) hopper barges, and a 390 kW tow boat. Dredgings are dumped at sea. The estimated total cost of the plant and harbour deepening project is $18.5 million. This paper describes the plant and harbour deepening project.

• Corporate Authors:

  Institution of Professional Engineers New Zealand

  158 The Terrace
  Wellington,   New Zealand 
• Authors:
  • Henwood, J W
• Publication Date: 1989-3

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 1-8
• Serial:
  • Transactions of the IPENZ
  • Volume: 16
  • Issue Number: 1/CE
  • Publisher: Institution of Professional Engineers New Zealand

Subject/Index Terms

• TRT Terms: Backhoes; Barges; Costs; Dredging; Excavating equipment; Harbors; Machinery; Ports
• Candidate Terms: Pontoons
• Geographic Terms: New Zealand
• Subject Areas: Construction; Finance; Highways; Marine Transportation; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00486080
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 31 1989 12:00AM