Efficient Mine
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Efficient :
▶ 30
Treated Planks
Scrap Metal
Efficient Mine 
Icon
Building
General
Employs miners who extract scrap metal from underground ruins. Innovative design maximizes mining speed.
The Iron Teeth gained the upper paw by being the first to survey the undergrounds.
Category
Dimensions
5x5 Height: 3 in the middle
Production
10 
Basic:
Efficient:
1
1.8h 5
1.8h 5Efficient:
1 2
1.8h 10
2 1.8h 10 Internal Storage :
Basic :
▶ 30 Treated Planks
◀ 150 Scrap Metal
Efficient :
▶ 30
Treated Planks▶ 60 
Extract
Scrap Metal
Main article: Mining.
For the Folktail equivalent, see Mine.
Efficient Mines are 
Iron Teeth 
Buildings to produce Scrap Metal. While mostly identical to the 
Folktail Mine, the Iron Teeth have figured out a way to use Extract to double the mining output of Scrap Metal.
Construction
The Efficient Mine can only be built on top of 
Underground Ruins.
Construction chain
Forester plants 
Trees.
Lumberjack Flag fells Trees to produce 
Logs.
Lumber Mill | 
Industrial Lumber Mill turn Logs into 
Planks
Gear Workshop turns Planks into 
Gears
Tapper's Shack gathers 
Pine Resin from 
Pine
Wood Workshop turns Planks and Pine Resin into Treated Planks
Usage
The efficient mine has 2 recipes:
- 1x Treated Plank to produce 5x Scrap Metal
- 1x Treated Plank and 2 Extract to produce 10 Scrap Metal
History
- Update 7
- Changed Efficient Mine’s basic recipe. The input is now Treated Plank 1x, the output is now Scrap Metal x5.
- Iron Teeth’s Efficient Mine’s second recipe now has an input of 1x Treated Plank, 2x Extract, and an output of Scrap Metal x10.
- Efficient Mines now have 10 workers enabled by default, up from 5.
- Update 6: The entrances are now at ground level.
- Update 1: Introduced.
Metal
Collection
Production
