Krehling Industries, 1399 Hagy Way, Harrisburg, PA 17110, US

Established in 1921, Pennsy Supply offers a wide variety of building materials, such as crushed stones, sand, high-calcium limestones, asphalt, concrete and colored concrete products. The company, with a location in Harrisburg, Pa., serves the commercial, residential, government, manufacturing, agriculture, education and infrastructure industries. It also provides asphalt installation, equipment hauling and power sweeping services. Additionally, the company operates more than 10 quarries and over five concrete plants. Pennsy Supply s plants are inspected and approved by the Pennsylvania Department of Transportation and the National Ready Mix Concrete Association. The company employs more than 500 people and offers various technical programs for college students.