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A general history of inland navigation, foreign and domestic : containing a complete account of the canals already executed in England, with considerations on those projected, to which are added, practical observations / by J. Phillips
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I 12

HISTORY OF

digging and removing the earth eighteen yards wide, the breadthof the canal, towing-paths, and drains : which we reduce to a levelthat breadth, and a fall decreasing each way for a mile and half. Inthe whole, there must be removed at a medium one hundred and ninety-eiglit thousand and fifteen cubic yards of earth, which, at three-penceper cubic yard, would cost two thousand four hundred and seventy-sive pounds three shillings and eleven pence ; which reduces the level,and makes the fall to Tern-bridge westward, one hundred and thirty-sixfeet nine inches ; and to Bridgford eastward, fifty feet eight inches: bywhich means four locks at least will be saved.

It must also be observed, that the high point of land at Madeley Parkis likewise an elevation of twenty-sive feet for a mile and a half, whichI would also propose to remove for the length of a mile and a half,and eighteen yards in breadth, decreasing also each way (as both ofthem are in light ground, this might be done with little labour); and toreduce the whole of this elevation as above, there must be removed,at a medium, one hundred and ninety-eight thousand and fifteen cubicyards of earth, which, at three-pence per cubic yard, would cost twothousand four hundred and seventy-five pounds three shillings andeleven pence, which will reduce the fall south-east to the junction ofthe canal above Bridgford, to one hundred feet three inches and aquarter; and from the said point, north-west to Winsford-bridge, totwo hundred eighty-four feet one inch, by which means four locks atleast will be saved.

As these distances and levels are taken by persons who have been ata very great expence in ascertaining them, they will no doubt befound very accurate ; which is not the cafe with all surveys that arepublished, many of them being frequently erroneous. I shall now con-sider in what manner it will be necessary to proceed in order to the ob-taining an act of parliament for executing this great design.

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