* Tunnels can not be opened if the north-west corner is more than 4 dirts below [[Water#Water level|water level]].
* You cannot [[Mining#Surface_mining|surface mine]] to correct an oddly shaped entrance once it is open. So you must make sure to have the tile in the exact shape you want it to be before you open the mine.
* You may not open create a mine entrance directly adjacent up to another3 tiles wide.** To widen a tunnel, the tile you mine must only be connected to ONE open tunnel only** Mine doors cannot be placed on tunnel entrances that are 2 or more tiles wide.
:'''Read More''': [[Slope]] | [[Digging]] | [[Water#Water level|Water Table]]