User blog comment:Guildmaster Grovyle/JLE Role Play, Fall 2016/@comment-24346726-20161022011049

Sometimes old structures need to be removed to make way for new structures. This is where demolition crews come in. You'd remove the need for things like wrecking balls. Same idea with tunneling except you don't put anything in it's place. As for mining you needto clear away the rock to get to the ores you want.