About Us Located in Kiel, Wisconsin, in southern Manitowoc County, Kiel Sand & Gravel, Inc. began as a supplier of Mason Sand to Sheboygan area contractors in 1959. Since that time Kiel Sand & Gravel, Inc. has expanded their operations and product lines to improve service to a broad range of commercial and residential customers. Since the first sales of mason sand, a variety of construction aggregates and decorative landscaping chips have been added to the product line. We are also a distributor of Rockwood Retaining Walls, Inc. In the most recent years, sales of construction equipment including front-end loaders, dozers and excavators have become a large part of our business. Kiel Sand & Gravel, Inc. continually strives to improve customer relations. Contact us with any questions or concerns you may have regarding any of our products or services.