Castella Quarries
The Quarry site is approximately 645 metres above sea level. This provides a working temperature from below Zero degrees Celsius in winter to 50, degrees Celsius in summer. Rainfall can vary depending on the season from 70ml per day in winter to drought in summer.
The rock type is a Metamorphic Hornfels deposit; which is broken into two layers; Weathered and Fresh. The fresh Hornfels attributes are Fine grained, Very hard, High strength, Wear resistant. These properties ensure performance satisfaction in Road Construction and sealing, Concrete structural construction or any situation requiring a High Quality, Strong, Durable material. It ranges in colour from Blue, Grey to Black.
The fresh layer produces Sealing Aggregate, Concrete and drainage Aggregates, Class 1-2 and 3, Crushed rock Road Base, Decorative Walling Stone, Spalls and Castella Toppings. The Weathered layer produces, NDCR Crushed Rock, Rubbles, Beaching Rock, B grade Aggregates, and fill.