Kotelnich - Perm - the railway section of the Kotelnich - Sverdlovsk (now Yekaterinburg) line of the Gorky Railway.
In the 1930s, the Kirov and Molotov expeditions of Lentransproekt specialists (since 1951 - Lengiprotrans) were organized to address the issues of increasing the throughput of the Kirov - Sverdlovsk route.
In 1935, an expedition was organized in Kirov to carry out design and survey work and working drawings for the construction of a second track on the Kotelnich - Perm section. Due to the uncertain position of the top management, the title was designed for several years with interruptions and had different names: Kotelnich - Perm, Lyangasovo - Perm and Balezino - Perm.
When designing in 1935, the initial materials received from the road administration were used, according to which a technical project was drawn up in accordance with the current standards.
In 1937, it was proposed to revise the project on the basis of the complete surveys of Lentransproekt and according to new technical standards with a 6% guideline slope. The complex technical design was completed in 1939, and construction actually began in 1938.
At the end of 1939, by order of the NKPS, it was proposed to abandon the use of 6% of the guideline slope and leave the existing slope of 9% to reduce the volume of work. Corresponding changes were made to the project.
In 1940-1943, in connection with the protracted construction, the development and issuance of working drawings in relation to the requirements and capabilities of builders was carried out.
