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Updated: May 25, 2025
Abbot, and with the secretary, an old Manchester man, Mr. Drinkwater. Then on the following day Mr. Peterson, the engineer of this section of the Canadian Pacific Company, drove me out to Lachine, and took me by his boat, manned by the chief and a crew of Indians, to see the finished piers and also the coffer-dams and works of the new bridge over the St.
The total length of the work is 2160 feet. The foundations of the piers were got in by coffer-dams in the ordinary way, Nasmyth’s steam-hammer being extensively used in driving the piles. The bearing piles, from which the foundations of the piers were built up, were each capable of carrying 70 tons.
Hundreds of tons of material had been sunk there; and that meant that hundreds of thousands of dollars also had been sunk. Upon investigation Neale found that, although many cribbings had been sunk for the piers, they had never been put deep enough. And there were coffer-dams that did not dam at all useless, senseless wastes of time and material, not to say wages.
"Sir, it appears to me you lost your head to good purpose," said Warburton. "Now just what were the tracks they wanted you to cover?" "I drew the original plans for Number Ten. They had not followed them. To be exact, they did not drive piles to hold the cribbings for the piers. They did not go deep enough. They sank shafts, they built coffer-dams, they put in piers over and over again.
In most places when a bridge has to be made, there is an infinite pother and worry about building the piers, coffer-dams, and heaven knows what else. Some swing their bridges to avoid this trouble, and some try to throw an arch of one span from side to side. There are a thousand different tricks. In Belfort they simply wait until the water has run away.
From the lowest gutters, where its stream commences, from the little shops where it is stopped by puny coffer-dams, from the heart of the counting-houses and great workshops, where its volume is that of ingots gold, in the shape of dowries and inheritances, guided by the hands of young girls or the bony fingers of age, courses towards the aristocracy, where it will become a blazing, expansive stream.
It was necessary to make the foundations very secure, as the river is subject to high floods; and this was effectuality accomplished by means of coffer-dams. The building was substantially executed in red sandstone, and proved a very serviceable bridge, forming part of the great high road from Shrewsbury into Wales. It was finished in the year 1792.
The birds' eggs on the coral banks also make an item in the blacks' bill of fare; while the frantic little fish hustled towards the shore are captured by the million in coffer-dams made of loosely twisted grass and beach trailers. These observations of mine are admittedly casual and unprecise.
From the lowest gutters, where its stream commences, from the little shops where it is stopped by puny coffer-dams, from the heart of the counting-houses and great workshops, where its volume is that of ingots gold, in the shape of dowries and inheritances, guided by the hands of young girls or the bony fingers of age, courses towards the aristocracy, where it will become a blazing, expansive stream.
I regret that time will not admit of my giving any description of the modes of "cut and cover" which have been proposed for the performance of subaqueous works; sometimes the proposition has been to do this by means of coffer-dams, and with the work therefore open to the day-light during execution, and sometimes by movable pneumatic appliances.
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