Water-power; an outline of the development and application of the energy of flowing water . 5andFront Elevortioi Fig. iuuiuiuLjuLJura—a—r=r-n—n—tj Fig. 41. CRIB WORK. 81 tion. A general idea of the nature of this work can be gotfrom the figure. It is cribwork formed of lo- and 12-inchsquare timbers laid up without notching or locking, and con-fined with |- and i-inch square drift-bolts 20 and 30 incheslong. It forms a series of pockets, 8 or 10 feet long and 7 or8 feet wide, filled with stone which is understood to have beenpacked by hand with care. The crown and slopes werecovered with
Water-power; an outline of the development and application of the energy of flowing water . 5andFront Elevortioi Fig. iuuiuiuLjuLJura—a—r=r-n—n—tj Fig. 41. CRIB WORK. 81 tion. A general idea of the nature of this work can be gotfrom the figure. It is cribwork formed of lo- and 12-inchsquare timbers laid up without notching or locking, and con-fined with |- and i-inch square drift-bolts 20 and 30 incheslong. It forms a series of pockets, 8 or 10 feet long and 7 or8 feet wide, filled with stone which is understood to have beenpacked by hand with care. The crown and slopes werecovered with 5-inch Southern-pine planking. The level plat-forms, which receive the falling water, were covered with steelplates j^^ inch thick. This novel feature gives a peculiarinterest to this dam, as the greatly diminished cost of steel andiron has of late made such plates available for use in this classof work. The up-stream crest of the dam is also defended bya plate of the same thickness. The planks were not laid incontact, but with half-inch intervals in order to keep the interiorwoodwork constantly saturated with
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
