Ironmine produces Iron, which is used for construction and research; and it's also used to upgrade weapons and armors.
| Levels | Workers Required | Iron Produced | Cap. Limit | Food Required | Lumber Required | Stone Required | Iron Required | Time Taken* |
| 1 | 25 | 100 | 10,000 | 210 | 600 | 150 | 400 | 1m 30s |
| 2 | 75 | 300 | 30,000 | 420 | 1,200 | 1,000 | 400 | 3m 00s |
| 3 | 150 | 600 | 60,000 | 840 | 2,400 | 2,000 | 800 | 6m 00s |
| 4 | 250 | 1,000 | 100,000 | 1,680 | 4,800 | 4,000 | 1,600 | 12m 00s |
| 5 | 375 | 1,500 | 150,000 | 3,360 | 9,600 | 8,000 | 3,200 | 24m 00s |
| 6 | 525 | 2,100 | 210,000 | 6,720 | 19,200 | 16,000 | 6,400 | 48m 00s |
| 7 | 700 | 2,800 | 280,000 | 13,440 | 38,400 | 32,000 | 12,800 | 1h 36m 00s |
| 8 | 900 | 3,600 | 360,000 | 26,880 | 76,800 | 64,000 | 25,600 | 3h 12m 00s |
| 9 | 1,125 | 4,500 | 450,000 | 53,760 | 153,600 | 128,000 | 51,200 | 6h 24m 00s |
| 10 | 1,375 | 5,500 | 550,000 | 107,520 | 307,200 | 256,000 | 102,400 | 12h 48m 00s |
- Times not adjusted for construction Research Project
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