This graph shows the remarkable increase in opencast mining in the 50 years after the Second World War. By the 2000s only about 20% of New Zealand’s annual coal production came from underground mines.
Using this item
This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.
Source: Annual production reports, Mines Department, Ministry of Energy, Crown Minerals, Ministry of Economic Development.