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Not a scientific way to calculate but as close as you will ever get for just the rail.I can imagine that the Union Pacific's requirement was about the same so — for the total mileage of the transcontinental railroad of 1776 miles required 177,600 tons (metric tons) of rail for the track alone. more that a standard 2000 lb ton andthat if you reported the railtonnageat a 2,000 lb./ton the total rail weight alone would weigh198,912 tons of iron rail. Just remember that in the 1860's that rail was measured by the metric ton but bolts, spikes and rail fastenings were measured by the standard 2,000 lb. Then you would have to add the weight of spikes bolts, rail chairs, fish plates (rail fastenings).I cannot give any estimates on the trestles or the many bridges, some of which wereover a thousandfeet long; and then there was the lining and shoring inside the tunnels.

The greatest amount of lumber used for one project was the 37 miles of Snow Sheds, as mentioned above.

Some other major uses for lumber: There were many, many wooden trestles, most of them were huge and they required an enormous amount of lumber.

One hundred tons per mile included the main line and all the side track, incidental uses and waste.

Using that method of measurement the Central Pacific railroads 690 miles of track would have been approximately 69,000 (metric tons 2240#) tons of rail.

That would requireagreat deal of research to even estimate. This should be an easy one to develop a reasonable estimate as there was an average of about 2,500 wood ties per mile over the entire 1,776 miles of the transcontinental railroad.

The average size of the tie was 6"x8" x 8 feet long. I'll leave that one for you to figure out the Board Feet required. Then there were the side tracks which amounted to about 10% of the mainline track.D., Harvard Economic Studies, 1908, states on page 256 that: " ... both principal and interest were paid in full." Regarding the CPRR and Western Pacific RR, Tutorow, p.1004 reports that final payment to the government was organized by a commission appointed by an 1898 act of congress, determined to be ,812,715.48 on Feb.rails, equal to 3,384,360 pounds.' but when he weighed those rails ' ...they weigh 3,355,170 pounds-which is 29,190 pounds less than your invoice ...' ...Total engine weight would be about 10,000 tons or so.