CONTINUED-£ meet the canal on the south side, the north being wholly impracti cable from the frequent deep ra- vines, and the extreme height of the land adjacent to the river. Que bridge will therefore be ne cessary. Guard Gates will also be required at the place of depar ture. The first mile commences with 7 feet cutting and runs a little above the level for 20 chains, thence it descends to the level. and runs nearly the same through the remaining part of this mile; no rock excavation will occur the nature of the earth is loam, and favorable for excavation. A the end of the first 21 chains, the sudden rise of the ground forces! us so near the river, that a stone wall will be required for the sup port of the bank on the lower side of the canal, 2 chains long) and 18 feet high.
In the 5 and 4 feet canals no
side wall will be necessary.
CONTINUED £ above summit a considerable rock] excavation will occur, and will be extremely difficult and expensive in consequence of the great depth it lies below the surface. Having removed the top earth, it is pro- posed to slope the rock one foot to one foot perpendicular, with 24 feet bottom for the 7 feet canal, 17 feet bottom for the 5 feet canal, and 12 feet bottom for the 4 feet canal. Two locks each of 9 feet lift will be required] in each of the said canals. Near the termination of this mile, our] line crosses a road where a bridge, is necessary.
ROCK Excavation, EARTH.
PUDDLING,
LOCKS Nos. 41, & 42,
in Estimates Nos. 2 & 3.
GRUBBING,
36 chains will connect the line of canals with the river on Doxy's farm, in Gloucester. The cutting sull continues neat the level. The nature of the earth is the same as in the last mile. The descent being so great, five locks will be required in each, 5 of 9 feet lift, and 2 of seven feet lift each, the lifts and situations being the same in all. No rock excavation will occur, except in placing the foundation of the locks. At the end of the first 12 chains, our line crosses a ravine one chain wide, 6 feet 66 decimals below level; the earth lies convenient for the embankment.] A culvert 4 feet by 4 will be neCONTINUED £
One mile and 17 chains com pletes the whole route and takes our line of canal to 9 feet 66 1-2 decimals deep water in the Otta-] wa river, making a total distance from the government wharf in Kingston, to the Ottawa, of 132 miles. We commence with 5 feet cutting, and run a little above the level 62 chains; principally through cedar swamp, the top earth of which is black mud about three feet deep on a bed of clay. Thence the ground rises very abruptly to a summit of 32 feet 14 decimals. The extra cutting is here 18 chains long thence it desceeds alinost perpen- dicularly to the level, but con tinues only 312 chains, after which, in a distance of 11 chains 51 links, the ground falls 46 feet 83 1-2 decimals to water level in the Ottawa river (on the 1st September, 1824.) In passing through the above summit, some Tock excavation will occur in the
CONTINUED -£ bottom, which will be somewhat difficult and expensive on account of the great depth it lies below the surface. The top earth here is generally loam mixed with some loose stone.
At the end of the first 21 1-2 chains the line crosses a little creek which will require a broken backed culvert 4 feet by 3. Hav- ing passed through the summit, it is proposed, from where we again meet the level, at the foot of the hill, to carry the bottom 60 feet wide for the 7 feet canal, 45 for the 5, and 36 for the 4 feet canal, whereby an excellent reservoir will be formed 2 1 2 chains long, for which the situation is favora- ble. The fall from thence is so extremely rapid that 6 locks will be required for each canal in a distance of 11 chains 51 links, which will form an entire piece of solid masonry from top to bottom. Estimate No. 1, will require 5 locks of 9 1-2 and 1 of 10 feet lift, making the bottom level 283 feet below the Rideau lake.
In estimates Nos. 2 and 3 the lifts and situations are the same as above.
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