This research was conducted to assess the landslide problems occurred in Welaite Kebele locatedrnalong the Arbaminch-Gidole Road, in Derashe Special Woreda, SNNP. The specific purposesrnwere to determine the extent of the landslide affected zone, identify the triggering factors/rnmechanisms, including mapping tectonic features. For these purposes Electrical Resistivity (withrnVertical Electrical Sounding modification) and Magnetic methods of prospecting were utilizedrnalong specific lines.rnFrom the survey results it has been possible to delineate three distinct lithological units withrncontrasting electrical properties. Accordingly, the top layer with variable resistivity (43-77 Ohm)rnhas a thickness range of 0-60m and it is associated with the response of colluvial deposit. Thernintermediate layer is highly conductive (2-32 Ohm-m) and relatively very thick (150-200 m) andrnattributed to the effect of a highly weathered and decomposed volcanic rocks which is wellrnsaturated. The substratum is marked by very high resistivity values (1400-10,000 Ohm-m) and itrnis delineated below the depth range of the second layer, i.e. 175-250m. Thus from these resultsrnthe morphology of the major failure surface, which is between the contact of the second and thernthird layers, is clearly outlined. It shows a SE dipping trend with gentle dip angle - . Inrnaddition, both the resistivity and magnetic survey data have equally suggested the possiblernpresence of structurally disturbed zones around VES10, VES14, VES16, as well as VES4. Thesernfeatures are assumed to play their role in the process of mass sliding.rnBased on the collected data analyses it became clear the road to Gidole is aligned over a deeplyrnlandslide affected zone, where along with the steeply dipping surface topography, the lithologicrnunits are weak and highly saturated by groundwater and also affected by tectonics. Therefore,rnconstruction of road and other infrastructures require careful consideration of these real siternconditions.