Underwater Anchor System (U.W.A.) is an economical technique that eliminates the need for a new seawall by retrofitting the existing seawall to resist deeper port depths.

Underwater Anchor System (U.W.A.) is an innovative and unique solution to deepening existing wharfs/seawalls using the miniJet® technology. Conventional techniques typically require the installation of new, deeper seawalls in front of existing ones in order to deepen the wharfs. This results in very costly and time consuming work with significant impact to shipping operations.

The U.W.A. eliminates the need for a new seawall by retrofitting the existing seawall to resist deeper port depths. This is done by installing additional horizontal anchors from the existing dock surface down to the proper level to allow safe dredging to the new required depth to handle larger ships. Jet grouting can also support and safely deepen the existing seawall if required.

After the Under Water Anchors are completed and the jet grouting has cured to gain sufficient strength, a galvanized anchor head assembly is lowered into place through the anchor rod. A diving crew using a crane and calibrated hydraulic ram set will post tension each anchor to the required loading. These additional anchors, installed underwater, will provide the additional lateral resistance to the existing seawall to safely allow a deeper wharf to handle larger vessels.

This technology is ideally suited to economically deepen existing wharves to handle the new Panamax and Post Panamax ships.