Starting from Omaha, the Union Pacific follows for nearly 500 miles, or almost half of its entire length, the valley of the Platte River. A better route for a railroad cannot be found upon the western continent. There are between Omaha and Cheyenne but three bridges worthy of the name. The Platte Valley is almost straight, rising toward the west at a nearly uniform rate of about 10 feet to the mile. Grading was practically unnecessary, and the work of construction consisted of little more than the laying of the ties and track. From the base of the mountains at Cheyenne to their summit is a distance of about thirty-two miles, the difference in altitude between the two points being less than 2,200 feet. The average grade is therefore about 68 feet to the mile, and nowhere are the grades heavier than 80 feet to the mile. There are heavier grades than these in the prairie State of Iowa, and the mountain grades of a number of Eastern roads exceed those of the Union Pacific by from 30 to 40 feet to the mile. The rise is, if not uniform, at least gradual, and the construction of even this portion of the road required, therefore, neither great engineering skill nor any unusual expenditure of money. The road now crosses a plateau which extends almost to the terminus of the Union Pacific at Ogden, and a very large portion of this is as favorable for a roadbed as the average railroad territory of the country. The route of the Central Pacific presented to the engineer no great obstacles between Ogden and the State line of California, the only elevation of any note to be surmounted being the Humboldt Mountains in Nevada. Their highest point, Humboldt Wells, is 221 miles west of Ogden, and has an elevation of 5,650 feet above the level of the sea, while that of Ogden is 4,320 feet. Upon an average the grades of this portion of the road do not differ from those found in the Mississippi Valley. The portion of the Central Pacific Railroad which traverses the Sierra Nevada is the most expensive of the whole line, but the cost of construction did not, even on this division, exceed the amount contributed for it by the Federal Government; for the statement is made upon good authority that a few of the leading promoters of the road built the first western section of twenty miles with their own capital, of less than $200,000, and a loan from the city of Sacramento and Placer County, amounting to $550,000, and then drew $848,000 Government subsidy, or more than enough to build the second section and draw another installment of the subsidy; and that they repeated the operation until the whole line was completed. These men were in such haste to realize the profits which their undertaking promised them that they did not even take sufficient time to make a proper survey of their line. Had they done so, a great saving, both in the construction and in the subsequent operation of the road, might have been effected. It is now