 The non-profit White Clay Watershed Association was formed in 1965, with the aim of building opposition to the dam.White Clay Creek State Park was established in 1968 as a small recreational park.Encouraged by conservationists throughout the early 1970s, the state purchased over of additional adjoining tracts of land to expand the park and protect more land, and in 1975 the park was renamed as Walter S. Carpenter, Jr. State Park in honor of DuPont's former president and chairman.