. Railroad digest . 2 1-2 yards driven perday in 1872; 10 yards per day in 1880, complete in 7 1-2 yearsand cost £142 per yard. Arlberg 0 1-3 miles long begun in 1880,time to complete it 3 years, 7 yards per day increased to nearly12, cost per yard £107 ; total cost £, Simplon tunnelbetween 12 and 13 miles long, an increase of speed over itspredecessors is expected. The Irish Channel tunnel estimatesinclude £125 per yard in Silurian rock and £102 in marls andsandstone; add to these the cost of pumping and ventilatingmachinery and the cost of shafts, etc., and the time wouldprobably
. Railroad digest . 2 1-2 yards driven perday in 1872; 10 yards per day in 1880, complete in 7 1-2 yearsand cost £142 per yard. Arlberg 0 1-3 miles long begun in 1880,time to complete it 3 years, 7 yards per day increased to nearly12, cost per yard £107 ; total cost £, Simplon tunnelbetween 12 and 13 miles long, an increase of speed over itspredecessors is expected. The Irish Channel tunnel estimatesinclude £125 per yard in Silurian rock and £102 in marls andsandstone; add to these the cost of pumping and ventilatingmachinery and the cost of shafts, etc., and the time wouldprobably be from 10 to 12 years. Progress of the Simplon Tunnel Cuiisiilur Reports. May 22, 1901. p. both extremities of the tunnel, the installations have beencompleted, the permanent ventilation system has been placedat the southern end, but at the northern extremity the buildingwhich is in course of erection for that purpose is not , in case of failure of water power, the ventilation is 5 4 5 6. 3ej7»353i33 3e3l30Sae7c*Sf4f3f£2l JO 2li RAILROAD DIGEST June, 1901 assured by special machinery for use in case of emergency. Theprogress of the work in the tunnel itself has been regular andhas kept pace with the contract. The advance in Tunnel in 1900 amounts to 11, feet which means for 360 days ofwork, an average of feet per day, as against 11,339 feetor feet per day in 1899. The expenditure for constructionof the tunnel, including lines of access amounts in round num-bei-s to $1,466,800 for first year and $3,474,000 for the second. Ventilating the Elkhorn Tunnel—Norfolk& Western Rly Railroad Gazette, May 10, 1901, p. full description of this important piece of work has beenfurnished by Mr. Charles S. Churchill, engineer, Maintenanceof Way. The tunnel is through the Flat Top Mountain inWest Virginia, which forms the divide between the waters flow-ing into the New River, on the east, and those flowing intothe Ohio, by way of Elkhorn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
