Founded in 1939, Martin Marietta Aggregates is one of the leading producers of construction aggregates in the United States. Located in Jamestown, N.C., the company supplies a vareity of crushed stones, sands and gravels used to build roads, sidewalks and foundations. It also provides asphalt and concrete in select geographic areas. The company has more than 285 quarries and distribution facilities in around 27 states and provides its products to more than 30 countries. Martin Marietta Aggregates provides electric utilities with both high-calcium stone and specialty products.