72 COST OF CONSTRUCTION. 
Section 10.— From crossing of Big Sandy to crossing of Rio Colorado, 53.7 miles. 
GRADUATION, MASONRY, ETC. 
Earthwork, 1,350,000 cubic yards, at 15 cents 
Rock-cutting, 27,000 cubic yards, at $1 
Masonry, 10,800 cubic yards, at $4 
Bridges, 537 feet, at $30 
Grubbing and clearing, 53.7 miles, at $200 
Cross-ties, for 53.7 miles, at $2,000 per mile 
7,797.2 tons, at $110 per ton 
Amount for 
Locomotives, 6, at $10,500 
Passenger cars, 5, at $3,100 
Baggage cars, 2, at $1,600 
Freight cars, 91, at $1,100 
Engine-houses and passenger depots 
Way stations for water and wood 
$202,500 
27,000 
43,200 
16,110 
10,740 
299,550 
Add 100 per cent. for increase over eastern prices 299,550 
Amount for graduation, masonry, &c 
SUPERSTRUCTURE. 
107,400 
Railroad iron—75 pounds per yard—delivered at Mojave village, 
on Rio Colorado, for single track and sidings, for 53.7 miles, 
857,696 
Transportation of same, 27 miles, at 5 cents per ton per mile...... 10,526 
Wrought-iron chairs and spikes, for 53.7 miles, at $800 per mile... 42,960 
Distributing and placing cross-ties and rails, 53.7 miles, at $1,500 80,550 
EQUIPMENT. 
63,000 
15,500 
3,200 
100,100 
50,000 
200,000 
4 
Amount for 
A EM 
For engineering and contingencies, add 20 per cent 
Amount 
Average cost per mile.. 
$599,100 
1,099,132 
431,800 
2,130,032 
426,006 
2,556,038 
— —— 
47,600 
