Every Cable Arm clamshell is equipped with a passive venting system. This venting system serves 3 purposes:

Open While Lowering

While the bucket is being lowered, the vents open - allowing water to flow through. This reduces downward water pressure and helps to minimize resuspension.

Closed When Raising

When the bucket is raised, the vents close - reducing the possibility of water washing material out of the bucket.

Drain Excess Water

Once the bucket reaches the surface, excess water is drained through the vents, avoiding excess dewatering costs.