GOLD PLACER MINING Alaska DGGS
Gold placer mining: placer evaluation and dredge selection, by C. M. Romanowitz, H. J. Bennett, and W. L. Dare. ... long stackers to dispose of oversize gravel, usually plus 5/8 inch. The New Zealand dredges, which were lighter in construction, were designed primarily ... Even with efficiently designed units and powerful pumps, the size of the