Gas pipeline construction in difficult geological conditions, such as hillsides and landslide areas based on both geological and geophysical engineering. Using of modern technologies founded on tomography extends the possibility of geophysical research. It allow to study structures of landslide in more detail and comprehensively. the results of a comprehensive interpretation of the electrical and seismic tomography data complement geotechnical investigations and allow to perform a qualitative assessment of state of landslide-prone slopes.