Tocks Island is a small island located a short distance north of the Delaware Water Gap in the Delaware River between New Jersey and Pennsylvania. It is part of Hardwick Township, in Warren County, New Jersey. The site was proposed for dam construction several times by the Corps of Engineers, beginning in 1934 and again in 1939. Geological studies after 1939 indicated that the damsite was unsuitable for construction. Flooding in the Delaware basin in 1955 restarted proposals for a flood control program. The 1962 design assumed earth construction in a slightly different location. The proposed dam was to be long and high, mainly of earthfill construction. At the New Jersey abutment a section of concrete gravity dam structure was to accommodate overflow spillways controlled by tainter gates, together with an intake structure for a powerhouse just downstream. The reservoir created by the dam was to extend upstream to Port Jervis, New York, covering .