In addition to Mostotrest, the joint venture will include TEK Mosenergo, owned by Arkady Rotenberg's son Igor. The partners are also interested in joining the joint venture of the 1520 group, a major contractor of Russian Railways. The head of Natsproektstroy Ruben Aganbegyan told RBC that negotiations with the shareholders of 1520 are underway, but the process is influenced by the criminal cases brought against the former and current owners of the group - Valery Markelov and Boris Usherovich. The entry of 1520 into Natsproektstroy opens the way for the joint venture to contracts for railway projects from the economic rescue plan, for example, the reconstruction of the BAM and Transsib (680 billion rubles) and the development of railway infrastructure in the Central Transport Hub (520 billion rubles).