Saint Helens

United States of America
Oregon
Columbia County
Saint Helens

Saint Helens

The polished inside of a dredge pipe, Sand Island. Maintenance dredging of the Columbia River Channel is ongoing. Sand is vacuumed from the river bottom by a large hydraulic suction dredge. The sand/water slury is pumped through pipes supported on floats to shore where it is discharged. The photo is the inside of a "Y" fitting used to split the flow coming from the dredge. — The polished inside …