The safty of flooding is very important,because the consequences that appear by the destruction of the large dam are catastrophical and are seen even years after the
destruction. In my thesis i have described the large dam called Vogrscek, which is also the biggest large dam in Slovenia. The large dam serves as watering of farmlands downstream. I have studied the possibilities of the destruction of the large dam and analyzed the conseqencess that could appear. I have come to the conclussion, that we can prevent the possibility of destruction with frequent technical checks to the point that it almost can't appear. The large dam that can be destroyed only in the case of an catastrophical earthquke, or in some other special cases, is still one of the most dangerous constructional objects in Slovenia. With a quick reaction and informing in the case of destruction , there can be saved a lot of lifes.