ACG Materials

Who we are :

ACG Materials is a national provider of rock and minerals including gypsum, limestone, sand, gravel, anhydrite and all of the downstream products that we create with them. But here, it’s more than just about the products. It’s about providing a level of service that surpasses customer expectations, far beyond what they may receive anywhere else. With a legacy of professional quality and service dating back to 1955, ACG Materials has earned the industry respect of our customers from the smallest organizations to Fortune 500 companies. We are dedicated to providing the expertise that only experience brings.

ACG Materials is the result of a long and successful history of doing one thing and one thing only. Treating people right. Our customers, our employees, our partners, and vendors. We believe when you take care of the people that matter most, everything else will take care of itself.

ACG Materials roots go back to 1955 when the Harrison Gypsum Company originally began as a small family operation supplying gypsum to the family farm and neighbors. Originally named the Cement Gypsum Company, Harrison Mine No. 1 was opened near Cement, OK, and underwent the name change to Harrison Gypsum Company in 1956. Over the years the company developed the mining business by supplying raw gypsum rock to nearby manufacturers of Portland cement.

As the market area for Harrison Gypsum expanded, gypsum reserves and production capacity also expanded. With business growing, capital investments were made to upgrade to modern mining equipment and improve infrastructure. In 1994, Harrison Gypsum’s mine #2 was named the largest single gypsum mine in the United States by the U.S. Department of the Interior Publication. Today, the total gypsum reserves of Harrison Gypsum Company is estimated to be in excess of a quarter of a billion tons.

What we do :

Gypsum, limestone and gravel are typically mined in an open pit quarry. The process used to mine them is very similar to that used in many other rock quarries.

First, the exposed rock is fractured by drilling and blasting. The fractured rock is then loaded into trucks and transported to a processing plant.

At the processing plant, the large pieces of ore are reduced in size by passing it through a large crusher. Crushing the ore generates a mixture of smaller rocks that can be cleaned and sorted by size.

Sorting is accomplished by passing the rock through a series of vibrating screens. Sorted rock is then loaded for distribution to be further processed by the end user.

Once a mine has been depleted of all of its ore, the mine is then “reclaimed.” This is the process of restoring land back to a natural or economically usable state.

A reclaimed mine can be beautiful, with many ponds and open fields. ACG Materials takes pride in its reclamation efforts, and is committed to returning mine sites to a state of usefulness.

In addition to mine reclamation; ACG Materials is committed to possessing all of the required licenses, air, storm water and other environmental permits, registrations, and reports in order to operate in a way that helps reduce the impact on our natural environment. Industry best practices and innovative solutions are also used in all of our locations.

Corporate Office
1550 Double Drive
Norman, OK 73069

Phone: (405) 366-9500

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