Page "Corris Railway" Paragraph 7

With the arrival of the standard gauge, the CM & RDT saw the chance to greatly expand their operation.

They applied, on 13 November 1863 to convert the tramroad to a railway, adopt steam locomotives and formally close the section between Machynlleth and Derwenlas.

On 25 July 1864 an Act of Parliament was passed changing the name to the Corris Railway Company and permitting the use of locomotives on the line.

It appears that around this time the line was under the control of Thomas Savin, the contractor who built the standard gauge lines in the area.