Figure 4. Downstream-bound vessel "crabbing" around HOP

Figure 4.

Downstream-bound vessel "crabbing" around HOP

and an 1,800-hp ladder pump). Dredge (hull) pump discharge diameters are 30

in. The Beachbuilder was designed to conduct beach nourishment projects where

long-distance pumping is required. During the demonstration, the ladder pump

and only one of the two hull pumps were required to pump slurry to the place-

ment site.

The Beachbuilder normally operates using wire rope to advance into a cut.

The dredge is equipped with six winches (three forward and three aft) that pull

against 11,000-lb Stephris anchors to effect movement (see Photo 6). Due to the

strong current and requirement for rapid movement, a tug was connected to the

stern to help maneuver the dredge (see Photo 7). During the project, it was deter-

mined that with the aid of the tug, the dredge could be advanced using only two

forward winches. Also during the project, a second tug was connected to the

starboard side of the dredge to aid in maneuvering the dredge into and out of the

channel (see Photo 8). A typical dustpan dredge is self-propelled and primarily

advances into the bank using two forward anchor wires. Stern or bow thrusters

are used to help maintain station.

The Beachbuilder is equipped with a large engine room housing the pump

engines and electrical generator, an equipment control room, a small galley, two

Chapter 2

Project Description