The Adam T. Bower Memorial Dam located at Sunbury, Pennsylvania is the Worlds Largest in length of its kind, spanning over 1800 feet in length. The dam consists of 6 rubber bags, each 300 feet in length, and 1 rubber bag 175 feet in length. Six concrete piers separate the bags along with 2 abutments, one on the eastern shoreline and the other on the western shoreline. The bags are anchored to a concrete foundation, which spans the total width of the river. When each bag is inflated they stand 8 feet in height.
During the summer months between Memorial Day and Labor Day the dam is operational. The dam creates a 3,000 acre pool called Lake Augusta and maintains a depth of 8 to 12 feet. The shoreline extends over 30 miles around the lake, and spreads 6.5 miles up the West and North Branches of the Susquehanna River.
The dam and lake are part of The Shikellamy State Park Complex.
Shikellamy State Park is in Union and Northumberland counties and is broken up into 2 sections. The 78-acre Shikellamy Overlook section is on the western shore of the Susquehanna River and overlooks the confluence of the West and North Branches of the Susquehanna River. The 54-acre Shikellamy Marina section is in Northumberland County, between the Borough of Northumberland and the City of Sunbury on the southern tip of Packers Island, at the confluence of the West Branch and North Branch of the Susquehanna River.