Entrance to the Croton Dam — F.B. Tower (1843) Tower's plate showing the entrance and gate house of the Old Croton Dam. The dam's masonry gate house controlled the flow of water into the aqueduct tunnel that carried it 41 miles to Manhattan. From 'Illustrations of the Croton Aqueduct' (1843). Date: 1843 Location: Croton-on-Hudson, NY Type: engraving Subjects: Croton Dam, gate house, aqueduct Tex…