(3) In dredging, sediment is pumped from the bottom and used as fill. The material
passes through a floating pipeline from the dredge to the area where the land is being reclaimed
Figure 2-25. Dredging Operation-Reclaimed Land.
(4) Before storing material at a dredging site, sand, gravel, and silt are dredged and
screened. Silt is wasted while the sand and gravel are piled for future use (Figure 2-26).
Figure 2-26. Dredging Operation for Building Material.
f. Logging is the process of felling and trimming trees and transporting the logs to a mill via
trucks or float. Furthermore, you may identify logs being loaded on ships for overseas shipment.
Imagery of this extraction method is not available at this time.
g. Forestry is the art of cultivating, maintaining, and developing forests.
The Corps of Engineers is proponent for logging operations and forestry; therefore this
production method is not further discussed in this lesson.