Shadow Lake Dam is a dam on Quioley Creek in Monmouth County, New Jersey. Built in 1931, it has a length of 600 feet and is 16 feet high. The dam impounds Shadow Lake. It has a main overflow spillway, an earthfill berm and an emergency spillway on the right. It has a discharge capacity of 1,912 cubic feet per second. Hubbard Road (Rt. 12) crosses over its crest.