Supporting Ontario's Infrastructure for a Century

The Lafarge Dundas Quarry has been a cornerstone of the Dundas community, supplying high-quality aggregate materials. 

We produce 3.5 to 5 million tonnes of top-grade crushed stone each year, primarily fueling construction projects in Hamilton and the Greater Golden Horseshoe area. The Dundas Quarry's unique ability to provide for this industry underscores our commitment to the local economy's vitality.

Supporting Growth and Industry

In Ontario, where each person consumes an average of 12 tonnes of materials like sand, stone, and gravel each year, the Lafarge Dundas Quarry plays a vital role. Producing premium crushed stone that aids in developing crucial infrastructure like homes, hospitals, schools, and highways drives regional growth.

Additionally, our provision of over half a million tonnes of metallurgical grade stone annually to the Hamilton steel industry is instrumental in steel production, further boosting Hamilton's economy. 

Construction Projects

The Dundas Quarry's aggregates have been integral to a multitude of notable construction projects. 

Including Hamilton General Hospital, McMaster University's Engineering Building, Football Training Fields, and DeGroote School of Business.400 series highways, local road improvements, and Hamilton bridges like the Burlington Skyway Bridge.

Water Management

At Lafarge Dundas, we use water only for aggregate processing and employ a closed-loop system to recycle water, minimizing consumption.

If you suspect that our operations may have affected your well, please get in touch with us immediately.

 Dundas Well Action Complaint Plan

Industry Awards

Lafarge Dundas is a recognized leader in the industry, having received numerous awards for its responsible operations. The site earned the Award of Excellence from the Ontario Stone, Sand and Gravel Association (OSSGA) in 2001 for outstanding property stewardship, progressive rehabilitation, and community relations.

We continue to be recognized for our commitment to environmental excellence and community service.


We prioritize responsible environmental management as a cornerstone of our operations.

Our Earthcare Environmental Management Systems guide us in safeguarding the environment, and we continually strive to enhance our performance.

 Explore Our Sustainability Efforts

Frequently Asked Questions

Have questions about Lafarge Dundas Quarry? We've got answers. 

Check out our frequently asked questions for insights into our operations, environmental practices, and community involvement.

Q: What products does the Dundas Quarry produce, and where are they used?

A: The Lafarge Dundas Quarry annually produces 3.5 to 5 million tonnes of high-quality crushed stone products. These materials are primarily used in construction projects within a one-hour drive from the quarry, supporting infrastructure such as homes, hospitals, schools, highways, and more. Additionally, the Hamilton steel industry uses over half a million tonnes annually for flux production, contributing to the local economy. We also supply steel, glass manufacturing, automotive, and agriculture industries.

Q: What are the hours of operation for the Dundas Quarry?  

A: The Lafarge Dundas Quarry operates year-round, 24/7. Production takes place for nine months, with the remaining three months allocated for maintenance. Shipping occurs year-round from the south side of Highway #5, typically from 6 am to 5 pm, Monday to Friday, during the high season. For more information, contact the Scale Office at 905-527-2744 or Plant Administration at 905-527-3671.

Q: What types of rocks and minerals are found at the Dundas Quarry?

A: The Lafarge Dundas Quarry is situated within the Guelph and Lockport Formations, dating back to the Silurian Period. The extracted rock is bituminous dolomitic limestone, with the upper bench being metallurgical grade limestone from the Guelph Formation, highly valued by the steel industry. The lower bench consists mainly of dolostone from the Eramosa Formation. While fossils are relatively scarce, the quarry is rich in minerals, primarily located in contact areas between limestone and dolostone. Some of the minerals found include Calcite, Celestite, Fluorite, Gypsum, Sphalerite, Galena, Pyrite, Marcasite, Quartz, Selenite, Strontianite, Dolomite, Chalcopyrite, Pyrrhotite, Aragonite, and Melanterite. Specimens from this quarry have been displayed at institutions like the Royal Ontario Museum (ROM) and the Earth Science Museum at the University of Waterloo.

Q: Can I visit the Dundas Quarry for a tour?

A: While we don't have regularly scheduled tours, we do accommodate requests and tailor tours to specific interests and organizations. We have hosted educational sessions with local elementary classes, career tours with high school students, and field trips with universities and colleges. For tour inquiries and scheduling, please contact Plant Administration at (905) 527-3671, Ext 1.