| 2 jaw crushers | $3,000 |
| 2 mixers | 3,000 |
| Track | 1,260 |
| Lumber | 500 |
| Pipe | 840 |
| Sheds | 400 |
| Pumps | 600 |
| —— | |
| Total | $9,600 |
If this first cost of the plant were distributed over the 23,568 cu. yds. of concrete it would amount to 41 cts. per cu. yd.
The cost of the concrete was as follows:
| Per cu. yd. | |
| Utica cement, at $0.65 per bbl. | $0.863 |
| Portland cement, at $2.25 per bbl. | 0.305 |
| Sand, at $1.35 per cu. yd. | 0.465 |
| Stone and labor, as above given | 0.975 |
| ——— | |
| Total | $2.608 |
| First cost of plant | $0.407 |
Section 15.—The conditions on this section were much the same as on Section 14, just described, except that the limestone was quarried from the bed of the canal, and was crushed in a stationary crusher, No. 7 Gates. The stone was hauled 1,000 ft. to the crusher on cars drawn by a cable from a hoisting engine. The output of this crusher averaged 210 cu. yds. per day of 10 hrs. The crushed stone was hauled in dump cars, drawn by a locomotive, to the mixers. Spiral screw mixers mounted on flat cars were used, and they delivered the concrete to belt conveyors which delivered the concrete into the forms.
The forms on Section 15 (and on Section 14 as well) consisted of upright posts set 8 ft. apart and 9 ins. in front of the wall, held at the toe by iron dowels driven into holes in the rock, and held to the rear posts by tie rods. The plank sheeting was made up in panels 2 ft. wide and 16 ft. long, and was held up temporarily by loose rings which passed around the posts which were gripped by the friction of the rings. These panels were brought to proper line and held in place by wooden wedges. After the concrete had set 24 hrs. the wedges were struck, the panels removed and scraped clean ready to be used again.
The cost of quarrying and crushing the stone, and mixing the concrete on Section 15 was as follows:
| Typical force. | Wages per 10 hrs. | Cost per cu. yd. | |
| General force— | |||
| Superintendent | 1.0 | $5.00 | $0.024 |
| Blacksmith | 0.9 | 2.75 | 0.011 |
| Teams | 1.7 | 3.00 | 0.025 |
| Waterboy | 4.5 | 1.00 | 0.022 |
| Wall force— | |||
| Foreman | 1.1 | 2.50 | 0.010 |
| Laborers | 14.4 | 1.50 | 0.105 |
| Tampers | 0.1 | 1.75 | 0.001 |
| Mixer force— | |||
| Foreman | 2.1 | 2.50 | 0.026 |
| Enginemen | 2.1 | 2.50 | 0.022 |
| Laborers | 23.1 | 1.50 | 0.180 |
| Mixing machines | 2.1 | 1.25 | 0.022 |
| Timber force— | |||
| Carpenters | 0.8 | 3.00 | 0.013 |
| Laborers | 0.7 | 1.50 | 0.005 |
| Helpers | 10.2 | 2.50 | 0.125 |
| Hauling force— | |||
| Foreman | 0.7 | 2.50 | 0.009 |
| Enginemen | 1.4 | 2.50 | 0.019 |
| Fireman | 0.4 | 1.75 | 0.003 |
| Brakeman | 2.2 | 2.00 | 0.018 |
| Teams | 0.4 | 3.25 | 0.007 |
| Laborers | 1.5 | 1.50 | 0.010 |
| Locomotives | 1.4 | 2.25 | 0.015 |
| Crushing force— | |||
| Foreman | 1.0 | 2.50 | 0.014 |
| Enginemen | 1.0 | 2.50 | 0.014 |
| Laborers | 11.1 | 1.50 | 0.081 |
| Firemen | 1.0 | 1.75 | 0.008 |
| Gyratory crusher | 1.0 | 2.25 | 0.011 |
| Quarry force— | |||
| Foreman | 1.2 | 2.50 | 0.012 |
| Laborers | 19.0 | 1.50 | 0.140 |
| Drillers | 1.8 | 2.00 | 0.017 |
| Drill helpers | 1.8 | 1.50 | 0.013 |
| Machine drills | 1.8 | 1.25 | 0.011 |
| ——— | |||
| Total | $0.993 |
The first cost of the plant for this work on Section 15 was $25,420, distributed as follows: