Etheridge railway line
Although construction was delayed by strikes in mid-1908 over the pay rate for railway workers, in February 1909 the line was opened to Einasleigh from Almaden. The Einasleigh copper mine was originally discovered by Richard Daintree in the mid 1860s, but the cost of transporting ore from the site made it uneconomic and it soon closed. The location was lost until the 1890s and a renewed interest in copper on the Etheridge field. A township known as Copperfield was established on the banks of the Copperfield River to service 12 copper mining leases extant by 1899, and this was surveyed as Einasleigh in 1900. The mine was reopened that year by the Einasleigh Freehold Mining Company, in which John Moffat had acquired an interest. By 1901 copper matte from a smelter at Einasleigh was being transported to Almaden by camel train. The coming of the Etheridge Railway in 1909 allowed Einasleigh to boom, and it was the largest centre on the Etheridge between 1907 and 1910. By 1910 six ore trains a week were running from Einasleigh to the Chillagoe smelters, and in 1911 the mine was purchased by the Chillagoe Company. It closed in 1914, and was reopened by the Queensland Government between 1920 and 1922.
Etheridge railway line
The section of the Etheridge Railway over the Newcastle range and through the Delaney Gorge has more earthworks than the rest of the railway. The railway track runs along the north face of the Delaney Gorge and along the bed of the Delaney River for a short distance. The significant elements within this section of the railway include any stone pitched bridge piers and abutments, stone pitched culverts, and stone cuttings. A large stone pitched culvert is located near Native Well, east of Wirra Wirra. A bridge over Starlight Creek, just east of Delaney Gorge, has stone piers and abutments, and a small bridge just east of Wirra Wirra has stone abutments. Bridges constructed with stonework are significant due to their rarity on the Etheridge line.