Boral Cement Works Berrima | Boral
A new cement mill, three 2000 tonne silos and a new coal mill are also built in support. Kiln 4 and 5 capacity is now 600 000 tonnes per annum. 1974 Berrima becomes part of the Blue Circle Southern Cement group. Kilns 14 are gradually phased out of production through the early 1970s.