OAK BROOK, Ill.–(BUSINESS WIRE)– Amboy Aggregates, a joint venture between Great Lakes Dredge & Dock Company, LLC (“Great Lakes LLC”) and Ralph Clayton and Sons Materials, L.P., announced today the sale of real estate owned by the joint venture on December 31, 2014. Great Lakes LLC is a wholly owned subsidiary of Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) (“Great