______________________________________________________________________ | | | Stone | Exca- | | | Timber, | Iron, | filling, | vation, | Cost. | | cu. ft. | lb. | cu. yds. | cu. yds.| | +---------+---------+----------+---------+----------+ Temporary works | 134,500 | 92,000 | 11,400 | | $79,000 | | | | | | | Permanent dam | 265,000 | 439,600 | 24,000 | 6,500 | 151,000 | | | | | | | Slide, including | 296,500 | 156,400 | 32,800 | | 102,000 | apparatus | | | | | | +---------+---------+----------+---------+----------+ | | | | | | Total | 696,000 | 687,000 | 68,200 | 6,500 | $332,000 | -----------------+---------+---------+----------+---------+----------+ The above does not include cost of surveys, engineering, or superintendence, which amounted to about ten per cent, of the above sum. [Illustration: DETAILS OF THE OTTAWA RIVER DAM, AT CARILLON.] The construction of the dam and slide was ably superintended by Horace Merrill, Esq., late superintendent of the "Ottawa River Improvements," who has built nearly all the slides and other works on the Ottawa to facilitate the passage of its immense timber productions. The contractors were the well known firm of F.B. McNamee & Co., of Montreal, and the successful completion of the work was in a large degree due to the energy displayed by the working member of that firm--Mr. A.G. Nish, formerly engineer of the Montreal harbor. THE CANAL The canal was formed by "fencing in" a portion of the river-bed by an embankment built about a hundred feet out from the north shore and deepening the intervening space where necessary. There are two locks--one placed a little above the foot of the rapid (see map), and the other at the end of the dam. Wooden piers are built at the upper and lower ends--the former being 800 ft. long, and the latter 300 ft; both are about 29 ft. high and 35 ft. wide. The embankment is built, as shown by the cross section, Fig. 6. On the canal side of it there is a wall of rubble masonry F, laid in hydraulic cement, connecting the two locks, and backed by a puddle wall, E, three feet thick; next the river there is crib work, G, from ten to twenty feet wide and the space between brick-work and puddle filled with earth. The outer slope is protected with riprap, composed of large bowlders. This had to be made very strong to prevent the destruction of the bank by the immense masses of moving ice in spring. The distance between the locks is 3,300 feet.