The Tooltip of the plan for the dig site says:
The Mine was once abandoned, but there are still underground riches
ready to be discovered.
- Level 1: Allows players to mine Draenic Stone from mineral nodes
in Draenor. Draenic Stone can be converted to work orders for Draenor
minerals. 7 Work Orders- Level 2: Allows followers with the Mining
trait to work here, granting a unique bonus (adds mining carts). Also
opens a new mineshaft, granting access to additional mining nodes. 14
Work Orders- Level 3: A final mineshaft allows access to rich
mining nodes. In addition, garrison guards will patrol your mine,
keeping it clear of hostile Goren. 21 Work Orders.
It does not say what I actually get. Do I get resources or ore? If I get Ore, how much per day? What are the exact benefits?
I am Engineer so the Ore would be welcome, but I cannot harvest any ore since I am Jeweler with my second profession on my main character.
Best Answer
You will be able to mine even without the mining profession and you can earn ores, stones, and primal spirits for doing so.
Icy-veins states that:
Blackrock ore and True Iron Ore are actual crafting reagents, and can be used like other mining ores found in WoW. Primal Spirit's are actually a garrison item than can be given to your primal trader in your garrison in exchange for other various crafting reagents.
Source
Source 2