Chitoliro cha corrugated culvert chitoliro chimapangidwa ndi zidutswa zingapo za malata okhazikika ndi mabawuti ndi mtedza, zokhala ndi mbale zopyapyala, zopepuka zopepuka, zosavuta kunyamula ndi kusungidwa, njira yosavuta yomanga, yosavuta kuyiyika pamalopo, kuthetsa vuto la destructio...