Croton Aqueduct Construction on Steep Hills Engineering diagram showing the method of construction on steep side hills for the Croton Aqueduct, Tarrytown Division. The diagram includes six cross-sectional views of the aqueduct's construction on varying slopes, with labels and measurements. Date: c.1842 Location: Croton-on-Hudson, NY Type: diagram Subjects: Croton Aqueduct, engineering drawing, s…