Diedrich Drill was founded in 1973 by John Diedrich, in La Porte, Indiana, as a machine shop for the Coal and Mineral Exploration industry. We quickly expanded our products to the Geotechnical and Environmental Drilling Industry providing augers, drill rod, soil samplers and related tooling. Through our innovative engineering staff, skilled machinists, assemblers, and our highly knowledgeable sales staff; we have become one of the premier manufacturers of top quality drill rigs and tooling in our industry.