The line was opened in stages by various companies and was completely opened on 12 August 1878. On 17 May 1860 the
Great Southern and Western Railway (GS&WR) opened a branch from (on its Dublin to Cork main line) to . An extension from Fermoy to was approved to be constructed by the
Fermoy and Lismore Railway in 1869 and following opening on 1 October 1872 was operated by the . The (WD&LR) was incorporated by the '''''' (
35 & 36 Vict. c. cvi) and fully opened its section on 12 August 1878; thus completing the continuous connection from Cork via Mallow to Waterford. The operated its own trains and was to take over operation of the Fermoy to Lismore section from the on 1 March 1893. The route was completely taken over by the in 1898. The line closed in March 1967 for economic reasons. As most patronage was for Cork on the boat train it was possible to re-route between Waterford and Mallow via , a route that was of greater mileage but which only resulted in a maximum 10 minute increase in journey time. ==Route==