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  • Aggregates


    Con-Agg of Mo operates as Boone Quarries and Norris Quarries throughout central, north central and north west Missouri. With over 20 locations, we are geared up to meet your aggregate requirements.
  • Ready Mix

    Ready Mix

    Con-Agg of Mo operates its ready mix operations as Columbia Ready Mix and Land Concrete. Located in Columbia and Moberly, we are able to service the central Missouri area from home builders to highway contractors.
  • Warehousing


    Con-Agg of Mo operates Subterra and Underground Records Management (URM) to satisfy the storage needs of many area businesses.

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  • Columbia Ready Mix Logo
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  • Subterra Underground Warehousing Logo
  • Boone Quarries Logo
  • Razorback Concrete Logo
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  • Sandidge Concrete

Con-Agg of MO - Aggregates, Concrete and Warehousing

Con-Agg of MO is a diversified, supplier of crushed limestone products, concrete, warehousing facilities and record-management services. Headquartered in Columbia, Missouri, Con-Agg has over 20 quarry locations serving a large geographical footprint in Central and Northwest Missouri while our ready mix operations and storage facilities are concentrated around the Mid-Missouri area.

Con-Agg takes great pride in filling the needs of its individual customers in a variety of markets, while contributing to the stability of the local economies in which it operates. We provide the materials that pave the path to the future of our communities and conduct ourselves with strict safety principles and environmental stewardship at the forefront of all our business decisions.

With over 425 employees state-wide, the Leadership Team at Con-Agg is committed to providing the safest operating culture possible. A true team effort ensures that this mission is carried out each and every day. Through the years our mining operations have been recognized by the Missouri Limestone Producers Association as Best-in-Class for both large and medium-sized operations. Recent honors include the Hillenkamp-Rush Meritorious Safety Award and special commendations for 22 consecutive years with no lost-time accidents.

Emphasis on Safety

Emphasis on Safety

Norris Quarries employees were recognized for 1 million man hours without a recordable incident.

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We Are Hiring

We Are Hiring

Check out the Employment page for a list of career opportunities with Con-Agg of MO.

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