32 Pa. Stat. § 807
The Water and Power Resources Board of the Department of Forests and Waters is hereby vested with authority, in the name of the Commonwealth of Pennsylvania, to determine the course and define the location, width and depth of any river or stream, or part thereof, wholly or partly within or forming part of the boundary of this Commonwealth, except the tidal waters of the Delaware River and of its navigable tributaries. Said board shall have power to protect the bed and banks of any stream, build dams, retaining walls, or other structures in or along rivers or streams, plug holes in the beds and banks thereof, and/or undertake such other works as will, in the opinion of the said board, improve and fix the regimen of any river or stream, or portion thereof, for the purpose of regulating the flow of such river or stream, for the prevention of percolations from streams through holes in the beds and banks thereof, for the protection of property, fish, life, and the lives of riparian owners and other persons, and for any other purpose not incompatible with the present and future interests of the Commonwealth and its people in the rivers, streams and water resources of the Commonwealth.
32 P.S. § 807