From a York, Pa., establishment three very large steel water-gates have been manufactured for use as sluice-gates. They will be used as sluice in the Shoshone river big dam, at Wyoming. These gates will control a body of water 310 ft. high, with an enormous pressure behind it, to be used for irrigation purposes. The gates proper, when erected, will weigh about 125 tons in all. They are built of iron, steel, brass and copper, and took several months to construct. When they are put in the dam they will stand perpendicular with the operative force at the top. and the openings through which the water can pass at the option of the operator will be located at the bottom of the gates. There arc two main posts above and four large openings below in each gate. The mechanism will all be operated by electricity. It required four large gondola cars to ship the iron and other work for the dam. which is claimed as the highest in the world. When finished, it will be 315 ft. in height and will be a twin to the Pathfinder dam, in the same section.