The miscellaneous expenses of the work comprised:
| Watchman, tools, telephone, etc. | $ 722.48 |
| Shanties, furnishings, supplies, etc. | 829.04 |
| ———— | |
| Total. | $1,551.52 |
To this has to be added $1,134.28, the cost of excavating the cofferdams. The total and unit costs of the different items of the concrete substructure work can now be summarized as follows:
| Item. | Total. | Per cu. yd. |
| Machinery and supplies | 1,594.86 | $ .69 |
| Cofferdams | 3,672.49 | 1.60 |
| Forms, etc | 821.30 | .36 |
| Concrete materials | 7,980.45 | 3.47 |
| Mixing and placing concrete | 3,490.87 | 1.53 |
| Excavating cofferdams | 1,134.28 | .49 |
| Miscellaneous | 1,551.52 | .67 |
| ————— | —— | |
| Total | $20,245.74 | $8.81 |
COST OF PERMANENT WAY STRUCTURES KANSAS CITY OUTER BELT & ELECTRIC RY.—The following cost of concrete work including retaining walls, abutments and box culverts, for the permanent way of the Kansas City Outer Belt & Electric Ry., is given by Mr. W. W. Colpitts. These figures are of particular interest, for the variation in prices of materials during the two-year period while work was in progress and as giving the average cost of the work on the whole line as well as for individual structures. The culverts were all box culverts with wing walls and the abutments were for girder bridges. Walls and abutments were of L section with triangular or trapezoidal counterforts at the back between base slab and coping. The form work was thus rather complex.
All work was reinforced concrete, and was done by contract under the following conditions: The work of preparing foundations, including excavation, pile driving, diversions of streams, etc., was done by the railroad company, which also bore one-half the cost of keeping foundations dry while forms were being built and concrete placed. The railroad company also furnished the reinforcing bars at the site of each opening. The concrete work was let at $9 per cu. yd., which figure covered all the labor and materials necessary to complete the work, other than the exceptions mentioned. The concrete proportions were 1-3-5. The cement used was Iola Portland and Atlas Portland. The sand was obtained from the bed of the Kansas River in Kansas City. The rock used was crushed limestone, passing a 2-in. ring and freed from dust by screening. Corrugated reinforcing bars, having an elastic limit of from 50,000 to 60,000 lbs. per sq. in., manufactured by the Expanded Metal & Corrugated Bar Co. of St. Louis, Mo., were used exclusively. The concrete in the smaller structures was mixed by hand, in the larger by a No. 1 Smith mixer. In the first structures built 2-in. form lumber was used, with 2 by 6-in. studs placed 3 ft. on centers. This was abandoned later for 1-in. lumber with 2 by 6-in. studs, 12 ins. on centers, and was found to be more satisfactory in producing a better face. The structures were built in the period from April, 1905, to May, 1907.
The cost of materials and the wages paid labor were as follows:
| Cement— | ||
| Per barrel at structure, April, 1905 | $1.25 | |
| Per barrel at structure, April, 1907 | 1.92 | |
| Average cost per barrel at mill | 1.42 | |
| Freight per barrel | 0.21 | |
| Hauling 1½ miles and storage | 0.12 | |
| Average cost at structure | 1.75 | |
| Average cost per cu. yd. concrete (1.1 bbls.) | 1.93 | |
| Sand— | ||
| Per cu. yd. at structure, April, 1905 | $0.625 | |
| Per cu. yd. at structure, April, 1907 | 0.75 | |
| Average cost per cu. yd., river bank | 0.30 | |
| Freight per cu. yd | 0.22 | |
| Hauling 1½ miles | 0.20 | |
| Average cost at structure | 0.72 | |
| Average cost per cu. yd. concrete (½ cu. yd.) | 0.36 | |
| Stone— | ||
| Per cu. yd. at structure, April, 1905 | $1.10 | |
| Per cu. yd. at structure, April, 1907 | 1.75 | |
| Average cost per cu. yd. at crusher | 0.65 | |
| Hauling 4 miles | 0.84 | |
| Average cost at structure | 1.49 | |
| Average cost per cu. yd. concrete (0.9 cu. yd.) | 1.34 | |
| Lumber— | ||
| Per M. ft. at structure, April, 1905 | $15.00 | |
| Per M. ft. at structure, April, 1907 | 22.50 | |
| Average cost per M. at structure | 19.00 | |
| Average cost per cu. yd. concrete | 0.49 | |
| Labor— | Max. | Min. |
| Common labor, cts. per hour | 20 | 17 |
| Carpenters, cts. per hour | 40 | 30 |