It was part of the Puketutu to Poro-O-Tarao contract, which began in September 1892.[2] From 18 January 1897 a weekly goods train ran to Poro-O-Tarao.[3]
A cattle yard was built in 1920.[4] The passing loop was lengthened in 1939,[5] to hold 219 rather than 97 wagons.[6] The work was done at the same time the loop at Waiteti was installed, the total cost for both being £19,000.[7]
The gradient to the north of the station is 1 in 70.[8]
There was a Farmers Union store at Kopaki in 1920[9] and a sawmill in 1952.[10]
Kopaki post office was 30 ch (2,000 ft; 600 m) from the railway station.[11]
A 1980 report said there was a concrete block shelter shed and a loop for 121 wagons.[12]
The 1925[13]-26[14] timber bridge carrying SH30 over the railway was rebuilt between 2021 and 2023 to carry high productivity vehicles.[15] It opened on 26 May 2023[16] and is skewed, with a length of 68 m (223 ft) and a cost of $12.4m.[17]
Only the shelter shed and passing loop remain.[18]