System for depositing and protecting sand and other littoral draft material

摘要

This invention relates to a system for depositing and protecting sediments on the floor of a body of water by utilizing a pair of rigid cast sheets of heavy material which are hinged together to form an arch- shaped device with the weight thereof being utilized to maintain the device in bridging relationship to a pipe or like installation resting on the floor of the body of water. The arch-shaped device has a generally central apex portion and opposite leg portions with respective upper convex and lower concave surfaces which diverge away from each other in a direction away from the apex portion.