Sarawak had never been particularly rich in railways but it was little known that there was an actual railway laid down in an area called Ensalai, near inland of the Baram River, in 1960.
Literally, Sungai Tujoh is translated as the Seventh River or Seventh Stream spelled in the form of Bruneian Malay language. An immigration post was built in the 1960s to control the movement of goods and people between Miri and points west in Sarawak with Brunei, at this "7th river".