Chillagoe Railway &amp; Mining Co.
After a number of proposals had been made for the route of a railway to the Etheridge field, construction of the Etheridge Railway finally commenced in 1906 from Almaden to Mount Surprise on the Mareeba to Chillagoe line. The railway was opened to Mount Surprise in May 1908, and through to Einasleigh on 8 February 1909, a total of 101 miles. The final 41 miles from Einasleigh to Forsayth were not opened until 5 February 1911, construction having proceeded slowly due to union unrest and uncertainty within the mining industry generally.
Hertford Loop Line
The line was opened in three stages between 1871 and 1924. The first section called the Enfield Branch Railway was developed by the London and York Railway and went from Wood Green to Enfield. In 1898, a plan was approved to extend the line north to Hertford and Stevenage, in order to relieve congestion on the main line without having to widen the Welwyn Viaduct. Work started in 1905 and Cuffley was reached on 4 April 1910. The construction of two major viaducts and the Ponsbourne Tunnel (at , the longest in the eastern counties of England and the last to be built by traditional methods), combined with World War I shortages of men and materials, delayed the opening of the route to Stevenage until 4 March 1918. Then it was single track and for goods services only. The line finally opened to passengers on 2 June 1924 when a new Hertford North Station was opened. The line was electrified in 1977.