SYSTEM AND BUSINESS

Spiral Tunnels to Reduce Grades

December 1 1909
SYSTEM AND BUSINESS

Spiral Tunnels to Reduce Grades

December 1 1909

Spiral Tunnels to Reduce Grades

The new spiral tunnels, completed last summer, on the line of the Canadian Pacific Railway, between Field and Hector, B. C., are described in the Railway World.

“Several miles will be added to the length of the track, together with more than a mile of tunneling and a couple of bridges, but the ‘Big Hill’ grade will be so reduced as to more than double the tractive power of the locomotives. While the work meant the excavation of 650,000 cubic yards of virgin rock, the employment of 1,000 men for twenty months, the boring of about 1.5 miles of tunnels through mountains 10,000 feet high, and the building of two bridges over the Kicking Horse River, it is estimated that it will prove a splendid investment for the Canadian Pacific. It will reduce this big grade from

4.5 to a maximum of 2.2. This will mean that the biggest obstacle to the running of trains over the Rocky Mountains has been removed, and that in the future on this section of the line two engines will be able to do much more work than four have hith-

erto been able to do, at one-third less expense to the company, and with an almost complete elimination of the ever-present risk to life of operating trains on a steep grade. The cost of the improvement was $1,500,000.”