t Price per foot for excavation and backfilling under 6 feet. Price per foot for excavation and backfilling over 6 feet and under 8 feet. Price per foot for excavation and backfilling over 8 feet and under 10 feet. Price per foot for excavation and backfilling over 10 feet and under 12 feet. Price per foot for excavation and backfilling over 12 feet and under 14 feet. Price per foot for excavation and backfilling over 14 feet and under 16 feet. Price per lineal foot for furnishing and laying 8-inch pipe. Price per lineal foot for furnishing and laying 10-inch pipe. Price per lineal foot for furnishing and laying 12-inch pipe. Price per lineal foot for furnishing and laying 18-inch pipe. Price per man-hole, including materials and labor. Price per flush-tank, including materials and labor. Price per lamp-hole including materials and labor. Price per lineal foot for repaving. L The following is a detailed estimate of the work as finally completed and represents the total cost of the work, exclusive of engineering, expenses of sewer commission, land damages, preparation of plans, records, etc.: A total cost, for construction proper, of $.55 per lineal foot. The work afforded the contractor a reasonable profit, but it is doubtful if at present prices it could be duplicated. At the time bids were submitted common laborers could be hired at from one dollar to one dollar and twenty-five cents per day. The entire Prices of material were also depressed. cost of the system, including man-holes, flush-tanks and all accessories, all expenses of engineering, and preparation of plans and records, expenses of sewer committee, and all costs, of whatever nature, chargeable to the sewers was $.72 per lineal foot. A tax of $2.50 per capita on the population accommodated by these sewers, or a tax of one-half of one per cent. on the assessed valuation of the city would have paid their cost. In Table XXVIII will be found a statement of bids received for the construction of a system of sewers in West Troy, N. Y. The contract was awarded to the bidder whose name appears first in the Table. The general statistics of the sewers are as follows: 66 Deepest trench (rock)... Number of flush-tanks Largest size of pipe 66 66 16 feet 116 18 inches 66 Smallest size of pipe (with few exceptions). 8 Number of outlets .... 7 7 Longest continuous line of sewer... About 9,000 feet .. 6 Datum level . . . . . . . . Low water in the Hudson River .48,926 feet The system is almost entirely the Separate System. The only exception being a small territory tributary to the Sixth Street main from which surface water is admitted. As will be seen by the accompanying map, the village has a river front on the Hudson of about two miles. This affords an opportunity of employing several outlets, and makes it possible to carry the sewage to its out-fall in the river by short, direct lines, except in special cases. By dividing the whole territory into several distinct systems, each with a separate outlet, large mains were avoided and the cost of construction materially reduced. The village extends back from the river about half a mile, and as the general direction of the main was towards the river, no very long lines were necessary. The surface of the ground falls towards the river with sufficient slope for sewer grades, so that flat grades were rarely necessary. The Erie canal runs through the village from north to south, nearly parallel with the river, and about 800 feet from it. The surface of the water in the canal is on the average about level with the natural surface of the ground near the canal; in places rising above, and in places falling below it. Besides the main line of the canal there are two branch canals, leading to the river, and two large basins. The canal, branches and basins, greatly complicated the work of designing the sewers, and increased the cost of construction. The material to be excavated from the trenches consisted of gravel, sometimes containing large boulders, clay and rock, varying in quality from soft shale, which yielded readily to the pick, to hard argillaceous rock, seamed with quartz. The canal banks intercepted the natural flow of the ground water towards the river and materially increased the trouble from this source. Since the water in the canal was about level with the natural surface of the ground near the canal, it is readily seen that the ground in the vicinity of the canal would be water-soaked, and that wet cellars and difficult trenching might be expected. In several places in the village the rock came to the surface in ridges, leaving pockets of considerable extent without drainage. In these places wet cellars were common. So little attention had been given to drainage that in some places stagnant pools of considerable extent remained all summer. The following is a statement in detail of the cost of the system: Earth Excavation.. Rock Excavation.. $ 16,008.23 26.891.79 Expenses of Sewer Commission, engi- 16,902.42 $113,799.42 Cost per foot of the entire system....$1.18 |