Thelen Materials currently produces well over 3 million tons of aggregate each year. We are an industry leader in the production of Aggregate that serves the Chicagoland and Southwest Wisconsin markets. We mine Aggregate for the smallest of residential customers to the largest of Chicago construction projects. Our variety of Aggregate includes I.D.O.T. and non-D.O.T. Aggregate, decorative stones, boulders, recycled and specialty products. We also have the ability to provide special blends and gradations for any application.