Johnston Enterprises, Inc / Agate Construction Co. Inc.

agate construction company, inc. is a heavy highway/marine general contractor new jersey/philadelphia marketplace. agate construction, a family owned business founded in 1981, is highly diversified in heavy construction, completing $50m of work annually for federal, state and municipal contracts. completed projects include: bridge and road construction; modified design/builds; piers; site work; utility work; and wastewater treatment plants throughout new jersey, pennsylvania, delaware and new york. the company continues to diversify and master its scope of work in the heavy highway construction industry and in 1999 acquired several additional businesses: a sand and gravel mining operation; a ready-mix concrete company; and a concrete foundation block and building materials company.