The Maritime History of the Great Lakes
Sir Wilfred (Dredge), 1 Aug 1902

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There has been launched from the yards of the Polson Iron Works, Toronto, a large dipper
dredge for W. J. Poupore, Montreal, who has a large government contract for dredging and harbor improvement works on the St. lawrence at Three Rivers, Que. The dimensions of the dredge are: Length over all 96 ft.; beam 36 ft. 8 in.; draught forward 9ft. 9 in.; draught aft 10 ft. 9 in. The hull is of composite construction having steel framework and wood planking. The
machinery equipment consists of a Clyde boiler, 10 ft. 6 in. in length by 10 ft. 6 in. in diameter, having a working pressure of 150 lbs.; with a modern hoisting engine having cylinders 16 and 18 in. The special aft spud being a walker, steel dipper handle and steel crane of very massive and substantial design. The hull has an overhead truss of heavy steel channels and I beams,
which take up the working strain of the vessel. At each dip of the spuds 80 yards of material is brought to the surface. The dredge, which has been named SIR WILFRED, was constructed from the designs of A. L. Desy, Montreal, consulting engineer for Mr. Poupore, under the direction of W. E. Redway, N. A.
      The Railway And Shipping World
      August 1902, p. 287-288:

      . . . . .

NAVIGATION NEWS. Work on the dredge SIR WILFRED at Polson shipyards is almost completed and it is expected that she will leave for Montreal in about a week.
      Toronto Globe
      Tuesday, October 7, 1902, page 7:

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new dredge, Toronto
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William R. McNeil
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Maritime History of the Great Lakes
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Sir Wilfred (Dredge), 1 Aug 1902