Sessional papers of the Dominion of Canada 1909 . |5 01^ J. 1> s <« .£ II beg I21 g 5 c .5 obe 19a—p. 72 GEORGIAN BAY SHIP CANAL SURVEY 71 SESSIONAL PAPER No. 19a Length of Locks.—As to size of lock, Diagram, page 61, indicates that lakeboats have attained a length of over 600 feet. Of course, the longest boats are to beconsidered as special craft employed in the iron ore trade only, but occasionally oneof the big fellows, as they are called, is chartered for grain, and may, consequently,seek the Ottawa route. Their load is so immense (425,000 bushels) and carried withsuch great economy,
Sessional papers of the Dominion of Canada 1909 . |5 01^ J. 1> s <« .£ II beg I21 g 5 c .5 obe 19a—p. 72 GEORGIAN BAY SHIP CANAL SURVEY 71 SESSIONAL PAPER No. 19a Length of Locks.—As to size of lock, Diagram, page 61, indicates that lakeboats have attained a length of over 600 feet. Of course, the longest boats are to beconsidered as special craft employed in the iron ore trade only, but occasionally oneof the big fellows, as they are called, is chartered for grain, and may, consequently,seek the Ottawa route. Their load is so immense (425,000 bushels) and carried withsuch great economy, that, although only one or two may pass per year, they cannot beneglected, and so the length and breadth of lock have been made sufficient for theiraccommodation. The locks at Sault Ste. Mary are the types to be considered in fixing the lengthand width. From Plate 37 it will be seen that the locks built or projected there arethe largest in the world. The Poe lock, 600 feet x 100 feet wide and 21 feet depth on sill (1896), was intendedto accommodate
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