. Electrical world. FIG. 3.—C.\X.\L PROFILES. overlaps substantially the entire site of the lower 500 ft. in the lengthof the old canal. The new site selected for the dam not onlyafforded a natural rock foundation with comparatively little excava-tion, but also shortened the required length of canal by more than700 ft. Of the total length of about 550 ft. in the central portion of thedam, 70 ft. at the left-hand end has a crest 3 ft. above that of theremainder in elevation. For its entire length the dam rests on thenatural ledge in the bed and banks of the river. In general outlinethe dam is s
. Electrical world. FIG. 3.—C.\X.\L PROFILES. overlaps substantially the entire site of the lower 500 ft. in the lengthof the old canal. The new site selected for the dam not onlyafforded a natural rock foundation with comparatively little excava-tion, but also shortened the required length of canal by more than700 ft. Of the total length of about 550 ft. in the central portion of thedam, 70 ft. at the left-hand end has a crest 3 ft. above that of theremainder in elevation. For its entire length the dam rests on thenatural ledge in the bed and banks of the river. In general outlinethe dam is straight and its height above the bedrock varies fromabout 10 to as much as 25 ft. between the elevations of heel and notable feature of the dam is its width up and down stream, whichamounts to as much as 31 ft. from heel to toe in the part that is 25ft. in elevation from heel to crest. The portion of the dam betweenthe abutments is of stone masonry laid in mortar of Portland cementand sand. Ashlar masonry
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
