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Tuesday, 10 August 1926

Senator CRAWFORD (QUEENSLAND) (Honorary Minister) - On the 15th July, Senator Grant asked the following questions : -

In view of the loss of life and the destruction of property on the 9th instant, consequent upon the stifling atmosphere in the Ardglen singleline tunnel on the Main Northern line, New South Wales, and as practically the same conditions may exist in the proposed single-line tunnels on the Kyogle to Brisbane railway - will the Minister state what is the estimated cost per lineal yard for -

(a)   Single-line tunnels,

(b)   Double-line tunnels, and what is the annual estimated loss if double-line tunnels are constructed.

The chairman of the Railway Council advises as follows,: -

The cost per lineal yard is approximately : -

(a)   Single-line tunnels, £147.

(b)   Double-line tunnels, £257.

The provision of double tunnels instead of single tunnels would mean an increase in the cost of the work by approximately £280,000, and interest alone on this sum would represent approximately £15,500 per annum.

The tunnels which are being constructed on the South Brisbane-Kyogle railway are 13 per cent. wider, and the area above rail level is 20 per cent. greater than the Ardglen tunnel.

The grade in the main tunnel on the South Brisbane-Kyogle railway is 1 in 150, as against 1 in 40 in the Ardglen tunnel.

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