to fill the lock after due for the accomplishment of this magnificent work. longer able to carry full loadson a draught of 12 it has been pumped out. The framework of the gates, The effect of the canal improveient is shown by the feet; only one of the largest vessels could be passed shown closed in… … culverts under the floor extend- them below the water line, and ing from the well, X (Fig. 5), sustained damage. In July, 1870, Congress made above the upper lock gate to the well, Y, above the lower lock an appropriation for beginning improvements, and the charge assigned to General O. M. Poe, of…
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