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The Custar Stone Company

The Bluffton Stone Company

West Millgrove Stone Company

Glacial Sand and Stone

Round Lake Sand and Gravel

Hillsdale Sand and Gravel

Asphalt Materials Supply

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Gerken Materials is a quality producer of asphalt pavements, crushed limestone, along with crushed and natural sand and gravel.

Gerken Materials consists of eighteen asphalt plants, three limestone quarries, and three sand and gravel pits. The eighteen asphalt plants are located throughout Northwest Ohio and Southeast Michigan. These asphalt plants have the capacity to produce 200 to 500 tons per hour depending on the location. The limestone quarries produce nominal sized ODOT products as well as berm stone and riprap products. Each sand and gravel pit produces round and crushed gravel products as well as natural sands and processed material. Certain products at the sand and gravel locations are MDOT and ODOT approved.


Gerken Materials, Inc.
  9-072 CR 424,      
  Napoleon, Ohio 43545      
  Office: 419.533.7701      
  Fax: 419.533.6393