Pennsylvania Statutes Title 32 P.S. Forests, Waters and State Parks § 693.4. Scope

(1) All dams on a natural or artificial watercourse, other than those licensed pursuant to the Federal Power Act,  1 where:

(2) All dams used for the storage of water not located on a watercourse and which have no contributory drainage, where the greatest depth of water at maximum storage elevation exceeds 15 feet and the impounding capacity at maximum storage elevation exceeds 50 acre-feet.

(3) All dams used for the storage of fluids or semifluids other than water, the escape of which may result in air, water or land pollution, or may result in danger to persons or property.

(4) All water obstructions and encroachments other than dams, located in, along, across or projecting into any watercourse, floodway or body of water, whether temporary or permanent.