Government and business leaders are applauding an Army Corps of Engineers study released Wednesday that recommends the deepening of the Port of Savannah. Plans to deepen the busy river channel that ships navigate to reach the Port of Savannah both shrunk and expanded Wednesday as Georgia’s port chiefs agreed to give up 1 foot of water depth and a federal agency’s final study on the project added about $50 million in costs to taxpayers. Those were the major changes in the Corps’ final version of its massive study on the economic and environmental impacts of deepening 38 miles of the Savannah River between the port and the Atlantic Ocean.