Heidelberg Materials North America supplies heavy building materials across the United States and Canada, with more than 450 locations and approximately 9,000 employees. The business traces its heritage to Lehigh Cement Company, founded as a single-mill operation in Ormrod, Pennsylvania, in 1897, and adopted the Heidelberg Materials name in North America in 2023. Its operations include cement production and coal-ash beneficiation, including processing harvested ash for recycled use.
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H&K Group, IncFounded in 1968 as Haines & Kibblehouse, H&K Group, Inc. is a family-led, vertically integrated heavy civil construction and construction-materials company serving the Mid-Atlantic. Its operations include producing asphalt and aggregates, building materials, and delivering heavy civil contracting services across the region. The company grew from its original family business into a group of affiliated companies while retaining its local operating presence.EASTON, PA
General ShaleGeneral Shale manufactures building materials, with brick production dating to the company’s 1928 formation through the merger of two earlier brick companies. It describes itself as a North American manufacturer with production facilities across the United States and Canada, and is part of Wienerberger AG. Its portfolio and manufacturing network also include building stone, concrete block, and a PVC pipe operation.WATSONTOWN, PA
Silvi MaterialsFounded in 1947, Silvi Materials is a family-owned construction materials producer that grew from a cement-block plant in Pennsylvania into a multigenerational business serving the East Coast. The company produces ready-mix concrete and aggregates, and imports, grinds, and blends cement at its Bristol terminal. Its operations include more than 36 locations and a network of concrete plants, quarries, and marine terminals.FAIRLESS HILLS, PA
New Enterprise Stone & Lime Co., IncFounded in 1924, New Enterprise Stone & Lime Co., Inc. is a fifth-generation, family-owned construction materials producer and heavy-highway contractor. Starting as a limestone quarry, it has grown into a vertically integrated, quarry-to-pave company serving Pennsylvania and Western New York, producing materials such as aggregates and asphalt while undertaking infrastructure construction.212312NEW ENTERPRISE, PA