We described a construction method for small ponds or dams based on the results of mechanical tests performed on typical soils distributed in Northeast Thailand. As a result of the investigations of the performance of small ponds in relation to erosion and collapse, we proposed a simplified method of determination of the occurrence of collapse as well as methods of prevention of collapse. We also tried to estimate roughly the amount of settlement associated with the collapse. In terms of erosion, the slopes of the proposed pond were found to be stable.