The Alakurtti - Salla railway line is a section of the Ruchyi Karelskie - Alakurtti - Salla railway, reaching the state border with Finland.
In the early 1990s, Lengiprotrans carried out design work for the reconstruction of the Alakurtti - Salla railway section. The construction of the road was associated with the expediency of organizing the transportation of foreign trade goods through the ports of northern Finland along the railway line.
In the 1970s Lengiprotrans took part in the development of the external transport system of the Kostomuksha Mining and Processing Plant (GOK). One of the first projects was developed for the Ledmozero - Kostomuksha - State Border railway line. The road was intended to ensure the operation of the GOK and, in particular, the export of products (iron ore pellets) both in the direction of Russia and to the Finnish factories in the Oulu region.
In the 1980s, Lengiprotrans developed a project for the Obskaya — Bovanenkovo line, the northernmost railway in the world. The route starts from the Obskaya station, which is part of the Transpolar highway, and goes to the North of the Yamal Peninsula.
In the post-war years Lentransproekt (since 1951 - Lengiprotrans) worked on the project of the Chum - Salekhard - Igarka Transpolar Mainline. The road was designed in special secrecy with the strategic goal of defending the Arctic coast of the USSR. In 1953, work was suspended with the death of I.V. Stalin, who supervised the construction.
In 1990-2000, Lengiprotrans developed a project for the Ledmozero - Vacha - Kochkoma railway line. The project was intended to provide a direct exit of trains from Kostomuksha to the Murmansk passage of the Oktyabrskaya railway. Earlier, in the 1970s, the institute had already worked in the area to provide approaches to the Kostomuksha mining and processing plant.
On the Ledmozero - Kochkoma railway line, Lengiprotrans engineers designed 18 small and medium bridges.
In 1982, Lengiprotrans began design and survey work on the Yagelnaya - Yamburg railway line in the Yamalo-Nenets Autonomous Okrug. Through the station Yagelnaya (Novy Urengoy) passes the Transpolar Mainline, designed by the Institute in the post-war years with the strategic goal of defending the Arctic coast of the USSR.
Railway line Galich - Soligalich - section of the Monzenskaya railway. This is the largest departmental railway in Russia, owned by Monzazheltrans LLC (it includes the Monzensky DOK, the Cherepovets Plywood and Furniture Factory and the Soligalichsky Lime Factory).
In the 1960s - 1970s Lengiprotrans developed a project for the Galich - Soligalich line with the aim of transporting minerals from peat mining enterprises to the Kostroma region.
The Ivdel - Ob railway line (now the Ob region) is the final section of the Sverdlovsk railway. It was intended for the export of wood from large tracts of the Sverdlovsk and Tyumen regions to the Verkhne-Kondinsky timber industry complex and further to the central part of the country.
The route was laid in difficult geotechnical and climatic conditions. The remote taiga region was sparsely populated, there were practically no access roads.
In 1967, tracks were laid to the Sergino station. By 1976, the railway reached the Ob station.
Engineers of Lentransproekt (since 1951 - Lengiprotrans) have worked on various transport facilities in Karelia. In the post-war period, the institute designed a single-track railway line Pinotzero - Kovdor on a steam locomotive traction with a baton method of communication. For the first time, traffic on it was opened in 1956. Currently, the line is part of the Oktyabrskaya Railway.
The single-track railway line of the Sverdlovsk railway, on a steam-locomotive traction with a baton method, was built according to the project of Lentransproekt (since 1951 - Lengiprotrans) in the direction of Kizel - Perm, bypassing the Chusovskaya station in 1943-1944. The commissioning of the Kizel - Perm section made it possible to reduce the mileage of trains by 82 km, as well as to bypass the difficult railway sections of the Kizel - Chusovskaya - Perm line.
