Considered in article are the conditions, natural and technogenous technogenous technogenous factors for the formation and the development of unfavorable geological processes on the territory of Irkutsk. The special attention is given to the engineering-geological estimation of loessial soils and technogenous formations as an unstable components of the geological environment. The intensification of suffosionalcollapsible processes on the urban territory was detected to be caused by the general additional humidification of soils, mainly due to the technogenous flooding, and the formation of man-made and artificially modified soils. The types of risk of naturaltechnogenous processes are identified, and the geological hazard of the territory is evaluated from the type of risk and the character of occurrence of the processes.