198 Telescope The " Business End " of the 27-inch Hydraulic Dredge " CARTAGENA" boring into the depths of the St. Clair River at Southeast Bend. The total amount of material removed, 22,000,000 cubic yards of sand and soft clay would cover the entire area of Belle Isle for a depth of 15 Feet. #298-60 Aerial Photograph looking Northeast from Lake St. Clair, of the Hydraulic Dredging Work being performed on the New Cutoff Channel, Lower St. Clair River. The Dredges SHUNIAH and CARTAGENA are busy scooping out material for this new passage. # 326-60