Rock Mine
From Captain of Industry Wiki
The 
Rock Mine is an Outpost found on the World Map which provides an infinite supply of Rock.
Repair and output potential
After discovery on the World Map, the Rock Mine must be repaired before it can be utilized. The Rock Mine extracts resources from an unlimited deposit.
| Level. | Repair Cost | Shifts | Storage Capacity | Maximum Production |
|---|---|---|---|---|
| 2 | 200x Construction Parts III | 2 | 1056x Rock | 12 / 20  (36 / 60  )
|
| 4 | 280x Construction Parts III | 4 | ? | |
| 6 | ? | 4 | ? |
Resource extraction
In order to produce any output, the Sawmill must be manned. Each outpost can support a variable amount of shifts, depending on the level of the outpost.
| Output (per shift) | Cost (per shift) | Total deposit |
|---|---|---|
| 6 / 20 (18 / 60 ) |
25x Workers 0.2 Unity per month Maintenance 8 / 60 |
Infinite |
