Quarry Hygiene: Aggregate handling, transportation and storage

Guidelines for quarry operators to help prevent the spread of disease to kauri.

Kauri are under threat from a disease caused by the pathogen Phytophthora agathidicida (PA). The disease is also known as 'kauri dieback'. These guidelines will help avoid spreading the disease.

Advice for planners, land managers and contractors to protect kauri

Many of the quarries that are used in the northern part of New Zealand are from hill sides that have native forest cover. These sites need to be cleared of this cover (or overburden) in order to access the quarry aggregate underneath. Given, the pathogen, PA has been recorded in the past in areas near quarries, quarry operations could pose a risk in spreading disease to kauri.

National plan to protect kauri

Note: From 2 August 2022 ten new rules/regulations have been introduced as part of a National Plan to help protect kauri from the PA pathogen that causes ‘dieback’ disease.

More information on the Plan and how it affects operations on your land.  

Research has underpinned the information in some of these guidelines. These resources will be updated in the coming months, with new guidelines to be developed.

More information about how to identify the disease.