72 
COST OF CONSTRUCTION. 
Section 10 .—From crossing of Big Sandy to crossing of Rio Colorado , 53.1 miles. 
GRADUATION, MASONRY, ETC. 
Earthwork, 1,350,000 cubic yards, at 15 cents... $202,500 
Rock-cutting, 21,000 cubic yards, at $1... 21,000 
Masonry, 10,800 cubic yards, at $4. 43,200 
Bridges, 531 feet, at $30. 16,110 
Grubbing and clearing, 53.1 miles, at $200.. 10,140 
299,550 
Add 100 per cent, for increase over eastern prices. 299,550 
Amount for graduation, masonry, &c. $599,100 
SUPERSTRUCTURE. 
Cross-ties, for 53.1 miles, at $2,000 per mile. 101,400 
Railroad iron—15 pounds per yard—delivered at Mojave village, 
on Rio Colorado, for single track and sidings, for 53.1 miles, 
1,191.2 tons, at $110 per ton. 851,696 
Transportation of same, 21 miles, at 5 cents per ton per mile_ 10,526 
Wrought-iron chairs and spikes, for 53.1 miles, at $800 per mile... 42,960 
Distributing and placing cross-ties and rails, 53.1 miles, at $1,500 80,550 
Amount for superstructure. 1,099,132 
EQUIPMENT. 
Locomotives, 6, at $10,500. 63,000 
Passenger cars, 5, at $3,100. 15,500 
Baggage cars, 2, at $1,600... 3,200 
Freight cars, 91, at $1,100 . 100,100 
Engine-houses and passenger depots. 50,000 
Way stations for water and wood. 200,000 
Amount for equipment. 431,800 
2,130,032 
For engineering and contingencies, add 20 per cent. 426,006 
Amount. 2,556,038 
Average cost per mile.;. 41,600 
