Iron Mine

Info	Costs				Gold Cost	Might
Level	Food	Wood	Stone	Time	Instant Upgrade
1	60	95	80	1m	5	525
2	80	100	90	2m	10	950
3	100	140	110	4m	20	1,375
4	230	290	210	5m 5s	30	1,800
5	580	650	470	16m	60	2,225
6	1 290	1 410	1 000	32m	90	2,650
7	2 530	2 830	1 940	1h 4m	140	3,075
8	4 500	5 240	3 480	2h 8m	220	3,500
9	7 450	9 090	5 840	4h 16m	340	3,925
10	11 680	14 920	9 290	8h 32m	520	4,350
11	17 530	23 420	14 140	10h 53m 3s	640	4,775
12	25 380	35 400	20 750	13h 52m 58s	780	5,200
13	35 620	51 810	29 500	17h 42m 27s	960	5,625
14	48 620	73 700	40 780	22h 35m 9s	1,160	6,050
15	64 680	102 210	54 980	1day 4h 48m 30s	1,410	11,013
16	84 010	138 510	72 440	1day 12h 44m 42s	1,690	15,159
17	106 850	183 840	93 490	1day 22h 52m 6s	2,010	18,695
18	133 410	239 500	118 450	2days 11h 46m 50s	2,380	21,771
19	163 800	306 770	147 570	3days 4h 15m	2,810	24,503
20	198 000	386 910	181 030	4days 1h 15m 25s	3,290	26,977
21	235 920	481 110	218 950	4days 13h 29m 13s	3,690	29,258
22	277 690	590 630	261 460	5days 3h 15m 18s	4,110	31,394
23	323 610	716 850	308 760	5days 18h 45m 16s	4,570	33,420
24	373 750	861 120	361 000	6days 12h 12m 10s	5,070	35,365
25	428 070	1 024 740	418 260	7days 7h 50m 43s	5,600	37,249
26	486 440	1 208 970	480 560	8days 5h 57m 28s	6,170	39,087
27	548 690	1 414 960	547 880	9days 6h 51m 3s	6,780	40,890
28	614 580	1 643 780	620 120	10days 10h 52m 28s	7,420	42,667
29	683 870	1 896 410	697 150	11days 18h 25m 19s	8,110	44,426
30	756 510	2 173 850	778 850	13days 5h 56m 11s	8,830	46,169
31	3 782 550	10 869 250	3 894 250
32	5 106 443	14 673 488	5 257 238
33	6 893 698	19 809 209	7 097 271
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Iron Mine Level	Attributes
	Iron Income/hour	Storage Capacity
1	49	2,250
2	122	5,625
3	220	10,125
4	367	16,875
5	550	25,313
6	770	35,438
7	1,020	46,913
8	1,306	60,075
9	1,629	74,925
10	1,859	85,500
11	2,172	99,928
12	2,556	117,563
13	2,973	136,744
14	3,410	156,853
15	3,691	169,776
16	4,031	185,438
17	4,396	202,219
18	4,849	223,031
19	5,313	244,406
20	5,778	265,781
21	6,243	287,156
22	6,719	309,094
23	6,896	331,031
24	7,099	354,938
25	7,282	378,675
26	7,463	402,975
27	7,807	437,175
28	8,126	471,300
29	8,430	505,800
30	9,021	577,350
31	11,456	733,000 Bonus +5%
32	12,602	806,300 Bonus +7%
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The only building requirement needed to upgrade the Iron Mine is to have the right Castle level.