Great Lakes Dredge & Dock Co., Oak Brook, Illinois, was awarded a $14,136,343 modification (P00015) to contract W912BU-15-C-0054 for dredging and rock removal. Work will be performed in Chester, Pennsylvania, with an estimated completion date of March 15, 2019. Fiscal 2019 operations and maintenance, Army funds in the amount of $14,136,343 were obligated at the time of the award. U.S. Army Corps of Engineers, Philadelphia, Pennsylvania, is the contracting activity.