. Electrical world. crib connecting with it, extending upand down the stream and confining the water to the easterly chan-nel. The dam is provided with a sluiceway at each end and extensiverunways for the passage of logs. The plan of development included a tail-race and wheel-pit to be nC. 6.—SETTING THE DRAFT TUBES. face of the crib, which was heavily sheet-piled and reinforced by apuddle wall 3 ft. thick protected by a bank of gravel at a slope ofone to one, riprapped with coarse broken stone. .s the main dam itself was very leaky, extensive repairs herewere found necessary, but they will b
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. Electrical world. crib connecting with it, extending upand down the stream and confining the water to the easterly chan-nel. The dam is provided with a sluiceway at each end and extensiverunways for the passage of logs. The plan of development included a tail-race and wheel-pit to be nC. 6.—SETTING THE DRAFT TUBES. face of the crib, which was heavily sheet-piled and reinforced by apuddle wall 3 ft. thick protected by a bank of gravel at a slope ofone to one, riprapped with coarse broken stone. .s the main dam itself was very leaky, extensive repairs herewere found necessary, but they will be only of a temporary nature, pending an entirely new structure in the near future. In order to carry on the hydraulic work as above outlined, it wasnecessary to construct a coffer-dam from the west end of the spillwayof the main dam to the west bank above the crib. The greatest depthof water found was about 7 ft., and the structure decided on was acribw^ork of lo-in. x 12-in. hemlock sawed timber. 6 ft. wide on J%.