customer spotlight: Isaac Construction Company – Plant Expansion

Since 1950, Isaac Construction has played a major role in building South Island infrastructure, delivering high-quality civil works while maintaining a strong environmental focus. Their Christchurch quarry produces a wide range of aggregates including concrete sand, asphalt, roading materials, drainage metal, stabilised products, and topsoil.

Following the Christchurch earthquakes in 2014, significant demand arose for additional construction materials to support the city’s rebuild. To meet this demand, Isaac Construction commissioned MIMICO Engineering to deliver a major static plant expansion.

The project was carefully staged into four phases, allowing Isaac to gain additional production capacity at the completion of each stage while the overall plant build continued.

Stage 1 – Sand and Concrete Aggregate Plant

• Metso TK12-26 Feeders (x2)

• Metso CVB2060-3P Screen

• Metso CVB2060-3 Wash Screen

• Krebs Cyclones

• Full structural steelwork and conveyor package

Stage 2 – Primary Crushing Circuit & Radial Stacking Conveyor

• Metso GP100S Cone Crusher

• 45m MIMICO Engineering Radial Stacking Conveyor

• Associated structures and conveyors

Stage 3 – Secondary Crushing Circuit & Cone PAP Production

• Surge Tunnel

• Metso TK11-15 Feeder

• Metso GP220 Cone Crusher

• Metso CVB2060-3 PAP Screen

• Associated structures and conveyors

Stage 4 – Tertiary Crushing Circuit, Barmac PAP Production & Sealing Chip Screens

• Metso Barmac B6150SE VSI Crusher

• Metso CVB2060-2 PAP Screen

• Metso CVB1540-3 Wash Screen

• Metso CVB1540-2 Sizing Screen

• Associated structures and conveyors

Project Highlights:

• Full four-stage plant completed in one year

• Staged build allowed progressive production increases

• Static plant configuration

• Expanded sand, concrete aggregate, secondary and tertiary crushing capacity

• 45m Radial Stacking Conveyor supplied

By working collaboratively with Isaac Construction, MIMICO Engineering successfully delivered a major capacity expansion project on time and in full, providing the additional materials required to support Christchurch’s post-earthquake recovery.