Water-power; an outline of the development and application of the energy of flowing water . ith stone,but in any case a sufficient quantity of stone must be thrownin to prevent rapid wear of the bottom during bottom of the sluice is supposed to be at the level ofextreme low water. Upon throwing in the stone, the waterrises somewhat and will be partly flowing through the plankwork is now commenced, starting at the sluice,which should occupy the deepest part, and working both fast as the planking is applied the earthwork is put in,which closes the passage unde
Water-power; an outline of the development and application of the energy of flowing water . ith stone,but in any case a sufficient quantity of stone must be thrownin to prevent rapid wear of the bottom during bottom of the sluice is supposed to be at the level ofextreme low water. Upon throwing in the stone, the waterrises somewhat and will be partly flowing through the plankwork is now commenced, starting at the sluice,which should occupy the deepest part, and working both fast as the planking is applied the earthwork is put in,which closes the passage under the plank. As the work pro-ceeds, the water rises more and more, and when the shallowerparts of the stream arc reached, it is flowing wholly through tliesluice. After completion of the {)lanking and earth filling, the 70 CONSTRUCTIOX OF DAMS. closing of the sluice causes the water to rise and flow over thecrest. Fig. 35 is another form of log dam. or spar dam as itis more commonly called in the lumber regions, of which thereare, or were recently, two examples on the lower Fox River in. J / / / ,7 Fig. 35. Wisconsin, one at Appleton and one at Xeenah, both on bedsof limestone rock. Log cribs, 8 feet by 16. are placed in lineon the bottom, with a clear interval of 8 feet between heavy log extends across the cribs, and on this are laid oneend of the spars, the other end resting on the bed. These arehewed or sawed timbers. Round timbers cannot well be used,as, being smaller at one end than the other, interstices must
Size: 3124px × 800px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
