Page:Historic highways of America (Volume 9).djvu/214

208 Since 1825, when the first step toward improving the Ohio was taken, the general plan has been to secure additional low-water depths at islands and bars by the construction of low dams across chutes, by building dikes where the river was wide and shallow, by dredging and by the removal of rocks and snags. Various plans of improvement were seriously mooted. Among these Charles Ellet's plan of supplying the Ohio with a regular flow of water by means of reservoirs was strongly urged upon the Government about 1857. Near the same time Herman Haupt proposed a plan of improvement by means of a system of longitudinal mounds and cross dams so arranged as to make a canal on one side of the river some two hundred feet wide, or a greater width, and reducing the grade to nearly an average of six inches per mile between Pittsburg and Louisville. A few years later Alonzo Livermore secured a patent for a combination of dams and peculiar open chutes through the