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Deep Mining
Shafts sunk deeper than any rival's — raises gather yield further.
- Entity ID
deep_mining- Branch
- Economy
- Stat buffed
gather_yield— Gather yield- Bonus per level
- +1.2%
- Maximum level
- 12
- Bonus at maximum level
- +14.4%
- Power per level
- 65
- Power at maximum level
- 780
- Base study time
- 30 seconds
- Study time at maximum level
- 43m 15s
- Prerequisites
- Smelting at level 8
Cost, time and bonus at every level
Deep Mining runs to level 12, adding +1.2% to gather_yield and 65 power each time. Studying it out costs the four soft resources — the same amount of each — and takes 43m 15s for the final level alone. Gems are only ever the optional instant finish; the study itself is bought with what your fields already make.
| Level | Total gather yield | Power | Study time | Each resource | Gems to finish |
|---|---|---|---|---|---|
| 1 | +1.2% | 65 | 30s | 3,000 | 50 |
| 2 | +2.4% | 130 | 45s | 4,200 | 70 |
| 3 | +3.6% | 195 | 1m 8s | 5,880 | 98 |
| 4 | +4.8% | 260 | 1m 41s | 8,220 | 137 |
| 5 | +6% | 325 | 2m 32s | 11,520 | 192 |
| 10 | +12% | 650 | 19m 13s | 61,980 | 1,033 |
| 12 | +14.4% | 780 | 43m 15s | 121,500 | 2,025 |
Taken from nothing to level 12 that is 2h 8m of raw study and 417,660 of each of food, wood, stone and iron — 1,670,640 resources in total. Levels above 10 additionally consume an advanced forging material, one more unit per level past the threshold, so the last 2 levels also need the forge working.
Where it sits in the tree
Deep Mining belongs to the Economy branch — the production, construction and gathering line — everything that fills the stores. It stays locked until Smelting reaches level 8. Nothing further in the tree depends on it, so it is a leaf: worth taking for its own bonus, never as a stepping stone.
The road here: Agriculture to level 5 → Quarrying to level 5 → Smelting to level 8 → Deep Mining. That is 3 studies standing between a fresh Academy and this one.
| Prerequisite | Level required | Each resource | Study time |
|---|---|---|---|
| Agriculture | 5 | 32,820 | 26m 23s |
| Quarrying | 5 | 32,820 | 5m 30s |
| Smelting | 8 | 103,140 | 24m 39s |
| Total before you may begin | — | 168,780 | 56m 32s |
Related
Guide: Research & the Academy · Research Priorities. Studied at the Maester's Academy. Index: all 66 studies · the whole database.
Rest of the Economy branch: Agriculture · Logistics · Irrigation · Crop Rotation · Granaries · Millwork · Quarrying · Smelting · Woodcraft · Animal Husbandry · Wainwrights · Foraging Craft · Masonry · Carpentry · Stonecutting · Trade Roads · Marketry
Every figure above is generated from the shipped game code — the same constants and formulas the running game uses — and regenerated whenever the balance changes. Nothing on this page is hand-typed.