Mine
Mine
Building
(Resource Acquisition)
Can only be placed on coal, copper, or salt veins. Can produce: 
Coal (★★), 
Copper Ore (★★), 
Salt (★★).
Specialization bonus:
Metallurgy (Proficiency) 
Cooperation (Comfort) 
4
Workers
ID = 'Mine'
Overview
The Mine is an essential Resource Gathering building. It has to be placed over at least 1 vein of Copper Ore, Coal, or Salt. The mine is the only way to make use of these veins.
The Mine is unlocked at level 2.
Whether you get Copper Ore, Coal, or Salt charges and their amount depends on the number and resource of veins covered by the Mine.
Production Chain
Deposits for Mine
3 Deposits exploited by the Mine.
Mining Veins
| Name | Charges | Primary | Bonus | In Biomes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| #1 | 
|
|
|
|
|
|
|
|
|
| |||
| Coal Vein | 120 | 
|
 30% |
|
x |
|
|
x |
|
|
x | x | x |
| Copper Vein | 75 | 
|
 30% |
|
x | x | x |
|
|
|
x |
|
|
| Salt Vein | 75 | 
|
 30% |
|
|
x |
|
|
x | x | x |
|
|
Required Building
Recipes in the Mine
| Buildings | Grade | Ingredient | # | Product |
|---|---|---|---|---|
|
★★ 0:35 |
— | 1 |  Coal
|
|
|
★★ 0:30 |
— | 1 |  Copper Ore
|
|
|
★★ 0:30 |
— | 1 |  Salt
|
Upgrades
Mine can be upgraded up to two times once you unlock Brass Forge level 3 in the Citadel.
Whether you get Copper Ore, Coal, or Salt charges and their amount depends on the number and resource of veins covered by the Mine. You can choose the same upgrade for both Level 1 and Level 2.
LEVEL I (Choose 1)
Cost:
15 
Planks/ 15 
Bricks
- Pit Pony: an average amount of additional charges, +50% production speed in the Mine.
- Minecart: an average amount of additional charges, an automated Minecart that transports resources from the Mine to the nearest Warehouse.
- Box Crib: a large amount of additional charges.
LEVEL II (Choose 1)
Cost:
12 
Pipes/ 4 
Parts/ 10 
Tools +
15 Planks/ 15 Bricks
- Pit Pony: an average amount of additional charges, +50% production speed in the Mine.
- Minecart: an average amount of additional charges, an automated Minecart that transports resources from the Mine to the nearest Warehouse.
- Box Crib: a large amount of additional charges.
Strategies
- Make sure to build a Small Warehouse next to the Mine to cut down on the time workers spend hauling resources.
- There are virtually no scenarios in which the Minecart upgrade outperforms Pit Ponies. [1]
- At full citadel, with optimal warehouse and hearth placement, miners on average spend 22.4 seconds working in the mine, 3.2 seconds taking break, and 2.5 seconds hauling per every charge.[1]
- The
Sea Marrow produced as a bonus resource in Salt mines can be used to alleviate fuel shortages or be used to open Abandoned Caches when 
Stone isn't available. - The Royal Woodlands do not spawn mining veins by default. Unless you can find a Rainpunk Drill, plan on obtaining Copper Ore from Clay deposits and burning
Wood or Sea Marrow for fuel.
References
- Testing done by Discord user @aphannnt https://discord.com/channels/418545968666116096/1325406372761960539
