Changing of the state of heaving hillocks in the operation of gas pipelines in the northern taige of Western Siberia

In the field period of 2016 there were made studies of the structure of heaving hillocks at the watershed in 30 km south-east of the city Nadym. It is established that from the surface they are composed of peat oligotrophic soils, which are underlain by a sandy loam of deposits. Gas pipelines exert a heating effect on the surrounding soils, and may initiate the destruction of the hillocks, which is a potential hazard.