The Kohtla-Järve and Ahtme gas shale plants are located in the northeastern part of Estonia.
The decision to build a new oil shale processing complex in Kohtla-Järve was made by the USSR State Security Committee in 1945. In the same year, Lentransproekt conducted an engineering-geological survey of sites for the construction of the Kohtla-Järve and Akhtme gas shale plants.
In 1948, the delivery of household gas produced from oil shale to Leningrad began. Later, the gas pipeline was directed to Tallinn and other cities in northern Estonia.
Railway line Delyatyn - Rakhov - state border - section of the Lvov railway.
The project of strengthening retaining walls, subgrade and structures on the section Delyatin - Rakhov - state border was developed by the Department of Engineering Geology "Lengiprotrans" in 1976-1981.
Bystrovka - Rybachye - the railway section of the Lugovaya - Rybachye line, passing through the territory of Kyrgyzstan.
Railway line Majori - Dubulti - section of the electrified line Tornakalns - Tukums II of the Latvian Railways. It passes through the territory of the Riga seaside in the city of Jurmala.
According to the Lengiprotrans project, the roadbed was reinforced against erosion in 1959-1960.
In 1946, the Engineering Geology Department of Lentransproekt (since 1951 - Lengiprotrans) developed a project to strengthen the Kaunas slope on the Lithuanian Railway in order to ensure the stability of the roadbed.
In the 1970s, Lengiprotrans developed a project to improve the roadbed on 382 km of the Pytalovo — Rezekne section of the Baltic railway.
Were prepared transverse profiles, longitudinal geological sections.
In the 1950s, Lengiprotrans carried out design and survey work to strengthen the sick embankment at 107 km of the Siauliai - Klaipeda line in the Lithuanian railway.
In the 1950s, Lengiprotrans developed a project to strengthen the roadbed on the Chernyakhovsk - Zheleznodorozhny railway section in the Kaliningrad region.
Plavinas HPP is a hydroelectric power plant on the Daugava River in Latvia, near the town of Aizkraukle. It is the largest hydroelectric power plant in the Baltics in terms of installed capacity.
In the 1950s, Lengiprotrans carried out design and survey work for the construction of a bridge over the dam of the Plavinskaya HPP hydroelectric power station. The following were prepared: a combined longitudinal profile, plans for Aizkraukle and Daudzeva stations.
In 1960-1970, Lengiprotrans developed a general scheme for a complex of strengthening measures to protect the roadbed of railways and highways on the Circum-Baikal section of the East Siberian Railway.
