Representations for the construction of the branch railway were first made in 1919 when a deputation waited upon the Minister for Public Works to urge the building a line from Wagga Wagga to Corobimilla. Exploratory surveys were made and it was decided that the most suitable route lay from Uranquinty to Moons Siding, a point about 6 km south of Narrandera on the Tocumwal line.
The Railway Commissioners furnished a report on the proposal and the matter was referred for consideration by the Public Works Committee on 22 November 1922. The proposal at that time was for the line to terminate at a location near to present day Galore. Finally, in August, 1923, the Parliamentary Committee on Public Works recommended construction of the line, but construction did not begin until March, 1926. On 27 June 1927, The Public Works Committee agreed to a 4-mile extension of the line to Sandigo, the present day Kywong. The line was opened to Kywong on 23 March 1929.
The Down Mixed Train operated on Tuesdays only in 1957, connecting off the Down Albury Mail, the Up service returning the same day, connecting with the Up Mail at Uranquinty.
The surrounding countryside is flat, open terrain, with few trees. The track was mainly unfenced, allowing livestock to graze along the track, causing some difficulty for train crews.
Passenger services ceased operation in 1975, during a period of widespread closure of New South Wales branch-line passenger services, leaving the line at that time as a seasonal wheat line. The line was completely closed in 1988.
<ref>tags exist, but no
<references/>tag was found