Great Lakes Dredge & Dock (NASDAQ:GLDD) reported quarterly earnings of $0.49 per share which beat the analyst consensus estimate of $0.26 by 88.46 percent. This is a 58.06 percent increase over earnings of $0.31 per share from the same period last year. The company reported quarterly sales of $242.87 million which beat the analyst consensus estimate of $206.70 million by 17.50 percent. This is a 22.25 percent increase over sales of $198.66 million the same period last year.