| 1. | Currently, suction dredge mining is banned in California until 2016.
|
| 2. | Another option is suction dredges, which vacuum up sand and silt and filter it.
|
| 3. | Soon suction dredges were employed and the mining spread along the lower Peace River.
|
| 4. | Some large suction dredges ( & ) are used in commercial production throughout the world.
|
| 5. | Suction dredging has been used across the Broads to both deepen waterways and remove phosphate-rich sludge.
|
| 6. | Small suction dredges are much more efficient at extracting smaller gold than the old " bucket line ".
|
| 7. | Gold pans and shovels are commonly allowed, but sluice boxes and suction dredges may be prohibited in some areas.
|
| 8. | Substantial suction dredging operations have shown promise, but tend to miss isolated spots which then regrow into larger weed beds.
|
| 9. | Alongside them, a self-propelled heavy duty cutter suction dredge will perform the task of loosening the hard oil and rock formations.
|
| 10. | In 2002, of land on the Little Chetco River were sold to suction dredges, permitted by the General Mining Act of 1872.
|
मोबाइल