*''The <item> would flow down into a <structure/fence>. You are not allowed to drop <item> on <structures/fences>''
:Occurs when trying to drop a dirt that is adjacent to a structure/fence in which the slope is more than 40.
*''The concrete would only flow away.''
:Occurs when trying to raise a rock tile that is greater than 40 slope. It only takes into consideration the 4 adjacent slope borders.
*''The frozen soil is too hard to dig effectively.''
:Occurs when there is tundra next to it-
}}