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Updated: June 10, 2025
Gus, the carpenter, was laying out the framing of heavy timbers reinforced with long bolts and set in cement on which the Pelton wheel was to be mounted. Several days were thus spent; the water was pouring over the spillway of the dam and it was with satisfaction that the boys found, after an inspection one quitting hour, that the wall, five feet high, was not leaking a drop.
This, in the premises, happened to possess associative affinity for the stimulus, and was therefore, by the same token, chosen, i. e., brought into play, as a spillway for the stimulus. In this case, the imaginary wish-fulfilment achieves an immediate, though limited, success.
Grabbing a shovel from a railroad employee, he called to his men and began digging a trench on the tunnel end of the "fill" to form a temporary spillway should the top of the flood reach the crest of the road bed. Fifty or more men sprang to his assistance with pick and shovel wherever one could stand and dig.
The top of the dam is, or will be, 30 feet above water level and have a width of 100 feet. The channel of the spillway is 300 feet wide. Ned had figured it out that one attacking the dam would naturally seek to enlarge the locks and the spillway and also to burrow in under the bulk of the dam where the sand and clay had been washed in below sea-level by countless years of flood and storm.
You see, when Greenfield tried to change the line of their canal so as to cut me out, Abe and I had begun to figure that some day the water from the spillway might cut down the channel and give us a little more drop. But we never counted on this, of course. I simply figured that I might just as well make the new contract safe." The Seer smiled. "You made it safe all right, Jeff.
For soon the Spillway at Gatun is to close its gates and all this vast region will be flooded and come to be Gatun Lake.
It was a drawing, similar to the one discovered in the bomb-room at the old temple, and was a complete sketch of the Gatun dam, the spillway, the locks everything was shown, with character of fills and suggestions regarding the foundations. Here and there on the drawing were little red spots. The significance of the red marks brought a date to Ned's mind.
Therefore, when Ned saw the four men moving toward the spillway, saw them part and seek the vulnerable points which have been described above, he knew that the time he had been waiting for had come.
And the rock spillway, narrow at best, had been further contracted by a close grating to prevent the escape of fish, capped by a good-sized timber, and in some slight degree also as a trestle footbridge. The original discharge pipe indicates that it was made about half earth and half rock, but if so there was little evidence of it in the broken dam.
My gadding takes me mostly there or to the intake heading these days. Just now I am trying to patch up the spillway which threatens to go out at any time altogether, and the heading itself is so shaky I'm almost afraid to touch it for fear it will fall down on top of me. No one ever dreamed that these structures would ever be called upon to stand the strain they are under now. I wish "
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