Mine Repair

[MDJoe]

Is it possible to repair a depleted iron mine and then have your geologist find additional ore to avoid the expense of building a new mine each time?

[Ezequiel_Sarkar]

Through gems you might be able to add to it. But that would be it and it wouldn't be worth it.

So in short, many players will not recommend trying to avoid to build an iron mine. Their pretty cheap at higher lvls.