dagriggstar

Yea correct. It'd be a seperate improvement buildable only on iron tiles.

I beleive (haven't tried) you could make an alternate tech tree with just steps 1 and 2. Basically, if a tech has a prereq that cannot be researched, but is given to a civ at the start of the game, that civ has its own tech tree. You'd have to create the tech tree though.

Hi, I was reading your suggestions about modding traits in this thread: http://forums.civfanatics.com/showthread.php?p=9692158

But I wouldn't expect what you suggested to replace the normal mine improvement, and also wouldn't require you to research mining. Am I correct?

Is there a way you know about to simply create an alternate tech tree for a civilization, that only that civ has?