In 1908, the State of New York announced plans to move Sing Sing Prison to Bear Mountain. Work was begun in the area near Highland Lake (renamed Hessian Lake) and in January 1909, the state purchased the 740-acre (3.0 km2) Bear Mountain tract. Conservationists, inspired by the work of the Palisades Interstate Park Commission, lobbied successfully for the creation of the Highlands of the Hudson Forest Preserve. However, the prison project was continued. Mary Williamson Averell, whose husband, Union Pacific Railroad president E. H. Harriman died in September of that year, offered the state another 10,000 acres (40 km2) and one million dollars toward the creation of a state park.