Geotechnical Features of Tirohia Quarry Landfill

At Tirohia Quarry, seven kilometers south of Paeroa, New Zealand, andesite rock is quarried for commercial aggregate use. The quarry owner proposes to construct a modern sanitary landfill at the site, filling the pit with 800,000 tonnes of municipal refuse while quarrying continues. The main issues considered while investigating the suitability of converting the quarry to a landfill included the effect of quarrying on the landfill liner (potential blasting/vibration effects), and the effect of leachate escape on the regional groundwater system.