From the moment of its foundation Lengiprotrans took an active part in the transport development of Kazakhstan. In the 1950s, large-scale development of virgin and fallow lands began in the Kazakh SSR and in a number of adjacent regions. On September 20, 1954, the Resolution of the Council of Ministers of the USSR No. 1985 "On the construction of narrow-gauge railway lines in the areas of virgin and fallow lands development" was adopted. The design of most of the facilities was entrusted to Lengiprotrans.
In the 1950s, the Tuz Kala - Uspenka railway line was designed. It was a continuation of the Maraldy - Tuz Kala section, branching off the Pavlodar - Kulunda railway at the Maraldy station. Preliminary and final surveys were carried out and a design assignment was drawn up. However, the construction was not implemented.
