606 PROCEEDINGS OP SECTION J. 



Its entire length is two hundred and seventy six-feet and its 

 extreme height from foundations to rail level is seventy-eight 

 feet. The Picton tunnel through Redbank Range (fifty-four 

 miles from Sydney) is one hundred and ninety-eight yards in 

 length, lined with brickwork set in cement throughout, and con- 

 structed for a single line of way. In form it is eliptical, fifteen 

 feet wide in the widest part, and seventeen feet high from rail level 

 to soflat of arch. The Gibraltar tunnel, seventy-nine miles from 

 Sydney, the excavation of which was through hard shale and 

 sandstone, is five hundred and seventy-two yards in length. 

 It has been lined throughout in brickwork and masonry in cement, 

 and is of the same form and dimensions as the tunnel through the 

 Redbank Range at Picton. The bridge over the street just beyond 

 Moss Yale station consists of two main girders of the Schwedler 

 type, ninety-eight feet span on a skew, spaced fifteenfeet nine inches 

 centre to centre, the cross girders are fourteen feet apart, centre to 

 centre and there are longitudinal rail-bearers. 



The viaduct over Barber's Creek, one hundred and eleven miles 

 from Sydney, is three hundred and forty feet in length, and consists 

 of five spans of sixty feet each, having two wrought-iron plate web 

 girders, thirteen feet apart, and four feet seven inches deep, resting 

 on stone piers set in Portland cement, the railway being carried on 

 cross girders thirteen inches deep and three feet apart. The viaduct 

 over the first crossing of the Wallondilly River, one hundred and 

 twenty-two miles from Sydney, is six hundred and sixteen feet long, 

 and consists of eight spans, in the following order, counting from 

 Sydney : — Two spans of sixty feet, one span of one hundred and 

 thirty feet, and five spans of sixty feet. The sixty feet spans are 

 similar to those over Barber's Creek, but the one hundred and 

 thirty feet spans consist of two box girders, thirteen feet six 

 inches apart and ten feet deep ; cross girders as in the sixty feet 

 spans. The piers aud abutments are built of brick, set in Port- 

 land cement. The viaduct over the second crossing of the Wol- 

 londilly River, one hundred and twenty-seven miles from Sydney, 

 is six hundred and sixteen feet long, and consists of one span of 

 sixty feet, one of one hundred and thirty feet, and five of sixty 

 feet, precisely similar in construction to the first crossing. The 

 height of the rails above ordinary water level is forty-six feet. 



Boxer's Creek viaduct, one hundred and thirty -three miles from 

 Sydney, consists of two spans of sixty feet, resting on brick piers 

 set in Portland cement. The height of the rails above ordinary 

 water level is forty-six feet. Mulwarree Creek viaduct, which is 

 close to the town of Goulburn, and one hundred and thirty-three 

 miles from Sydney, is eight hundred and fifty-eight feet in length, 

 and consists of twelve spans of sixty feet, each of wrought-iron 

 plate web girders, similar in construction to those at Barber's 

 Creek, and resting upon brick piers set in Portland cement. The 

 AVagga Wagga timber viaducts, which have been erected over the 



