Derry Construction Co.

Keystone Lime Co., based in Springs, PA, operates stone quarries and crushing plants mining and processing limestone and sandstone in multiple states. Our company offers paving services for everything from driveways to highways. Contact us to learn more about the unique types of stone we quarry throughout the Tri-State area.

A Versatile, Family Operated Business, Serving the Pittsburgh Area for Over 30 YearsHolbein, Inc is a locally-owned Construction company that provides site planning, design, excavating, development, , and project management services for industrial, commercial, municipal and residential markets. We strive to deliver excellence and our proven reputation of honesty and reliability demonstrates this effort.We have over 30 years experience in the Pittsburgh area, specializing in road construction, excavating, storm water, natural gas site, water and sewer, and facility-related projects.