31. There he engaged in placer mining and developed a life ling friendship with Fenton M . Slaughter. 32. John Reed started placer mining , and later underground mining on his property and became a wealthy man. 33. Since then, small-scale mining, reworking of old mine dumps, and placer mining has continued in the region. 34. The Montrose Placer Mining Company was formed to mine gold from placer deposits along the Dolores River. 35. Hughes moved to southern Arizona in 1876 when he began placer mining in the Santa Rita Mountains. 36. Reed first developed placer mining on his property, then underground mining, and became wealthy from the gold. 37. After the sluice-box stage, placer mining may become increasingly large scale, requiring larger organisations and higher capital expenditures. 38. Ghana Consolidated Diamonds uses a strip and mine method at their placer mine in Akwatia, using Manitowoc draglines. 39. It is not like placer mining . 40. During the last glacial period native gold was freed from the host rock and became available for placer mining .
