 The Susquehanna Boom was a system of cribs in the West Branch Susquehanna River designed to hold timber in the river until it could be processed at one of the nearly 60 sawmills along the West Branch Susquehanna River between Lycoming and Loyalsock Creeks in Lycoming County, Pennsylvania in the United States.The boom was constructed in 1846 under the supervision of James H. Perkins.A boom is a chain or line of connected floating timbers extended across a river, lake, or harbor (as to obstruct passage or catch floating objects).