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OSH Guide for Safety With Underground Services - 2002

A guide issued by Occupational Safety and Health (OSH), a section of the Department of Labour, in 2002 on working safely around underground services. This document contains the convention for the colour of underground services and the symbols to be used. Refer to Section 34 Duct Colours, Surface Marking Colours and Symbols on page 28.

The Role of the Locator in Damage Prevention

A presentation by Innes Fisher, ULS Specialist - Utility Mapping on the role of the Locator in damage prevention. This presentation was given at the beforeUdig Damage Prevention Workshop held in November 2020.  Innes is a beforeUdig Certified Locator and NZ industry thought leader. He was the technical consultant on the introduction of NZ industry Locator certification.

Trenchless Technology - The Implications

A presentation at the 2017 NULCA Australia Damage Prevention conference on the implications of increasing use of trenchless technology for laying of underground services. The presentation discusses the issues and impacts on locating of services in the future. Innes Fisher, Specialist - Utility Mapping is a thought leader in the NZ utility location industry.

Radiodetection RD8100 PTLG Internal GPS Field Trial

As part of a field trial of the new Radiodetection RD8100 PTLG we logged cable positions and depths at intervals that had already been determined. The internal GPS feature of the RD8100 enabled to capture the position of the observation.

The same positions were also captured using a Leica GS08+ GNSS receiver with RTK corrections as a normal part of the project.

The two Google Earth KML files contained in the downloadble zip file have been generated from the results of that trial to show the horizontal variation possible between the RD8100 and a survey grade GNSS unit in a typical urban field environment.