Division of Transport Construction Department (TCD) No. 99- Temporary Operation Division (TOD) - was founded in 1962. This division carried out construction operations, commissioning and temporary operations of rail road transport facilities. The structure of TOD involved rail road movement coordination, cargo and commercial operations, signalling and communication, rail cars and own locomotives maintenance.
In 1991, after privatisation, TOD exited TCD No. 99 and was reorganized into Bolat Zhol JSC, in 2002 - into Bolat Zhol LLP.