Site is with total length of 21 100 m and includes renewal and electrification of railway line station Voluyak – station Kalotina - Zapad. The execution of part “Electrification” started in April 2004 and ended in December 2004.
Main types of construction and installation works, which were performed:
 - founding, delivery and installation of reinforced concrete pillars – 375 pcs and steel lattice pillars -68 pcs.
 - delivery and installation of copper contact conductor 100 sq. mm - 16 712 kg.
 - delivery and installation of copper contact conductor 85 sq. m - 2 608 kg.
 - delivery and installation of different types of consoles - 423 pcs.
 - protection against traction current, dispatcher interfaces, internal station interfaces, main cable and other similar works.