THE MOUNT GROUP operates one of the oldest argillite quarries in the Mid-Atlantic region.

First developed on an industrial scale in 1924, THE MOUNT GROUP purchased the Harleysville quarry in 2010.
Since then, we have built it into a state-of-the-art facility capable of producing a complete line of high-quality aggregates and red stone for commercial and decorative use.

THE MOUNT GROUP is committed to preserving our environment and conserving natural resources. By recycling construction materials, we reduce the disposal of usable products into landfills, where space is limited. Our recycling facilities operate under Pennsylvania Department of Environmental Protection (PA DEP) guidelines. 

We strive to be good neighbors in the communities that we serve.

Harleysville Quarry Quote Request

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Select#57RED #57PennDOT #57#10 ScreeningsRED #10 Screenings2AAASHTO #3PennDOT #8Rock Lining Stone R-3Rock Lining Stone R-4Rock Lining Stone R-5Rock Lining Stone R-6Rock Lining Stone R-7Shot Rock#1 Ballast#3 BallastIncoming Reclamation Fill

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Hot-Mix Asphalt Plant

The asphalt plant located on-site is open and operated by Allen Myers. Please contact Allen Myers at 610-960-3152 for more information.

A digital electronic scale house is on site with a second scale already in the pipeline to ensure quick efficient service for our customers.

Hours of Operation