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DAMS.
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II I
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slope of the water-face. This style of gate has been found by long experience to be the best.
The weight of the dam is about 6500 tons, and the hydrostatic pressure, with the water line 95 feet above
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Fig. 6. Bowman Waste Dam.
datum line, against a vertical plane of that height across its upper face, is 2571 tons.
It
is believed that the structure is sufficiently stable to allow a flood
of 16,000 cubic feet of water per second to pass with safety through
the wastes and over its crest.
The water passing over the dam falls on bare granite bed-rock, and thence down a steep gorge.
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