Ogden Point Quarry is a large geological formation representing over 100 years of resources in reserve with depth of the ore formation of 152 meters.
Step One
The limestone rock is obtained through blasting which requires drilling the limestone face with holes 15 meters deep.
Drills are specially designed to reduce dust emissions while drilling, and the blast design helps to control ground and air vibration.
Step Two
Approximately 40,000 tonnes of rock are loosened with each blast.
Free stone is then transported via 70-tonne haul trucks to the 137cm gyratory crusher which crushes the stone at a crushing rate of 1,500 tonnes per hour.
Large pieces of limestone are crushed to approximately 15-20cm in diameter.
Step Three
This material is then moved on a conveyor to our dock for loading onto lake ships. Lakers take approximately 24 hours round trip, to transport about 18,000 to 19,500 tonnes of stone once they’re loaded.
During the shipping season (April to December), the lakers are dedicated solely to the transport of limestone between the quarry and the Mississauga Plant.
Step Four
The entire manufacturing process — from blasting and extraction to shipping — is monitored for environmental, process and quality parameters. Each blast is monitored to verify that ground vibrations and air pressure readings are below guidelines.
Step Five
CRH employs 21 people at its Ogden Point Quarry and over 150 at its Mississauga Plant representing a wide range of skills. Health and safety is of paramount importance at CRH. The health and safety advisor and safety committee work closely together to provide a safe working environment for all employees.
