Abstract: A permeable breakwater for submerged offshore or seawall retentive installation includes a base and permeable opposed sides terminating at an upwardly projecting permeable wave wall. The breakwater is located offshore to cause moderate to heavy waves to break further offshore thereby dissipating their energy before reaching the beach.

Abstract: An erosion protection device is provided to control erosion in environments prone to water induced erosion. Each individual device includes a central core area, and six generally equally sized legs projecting outward from the core at equal spacing in each direction. Spacers are provided at the interface of the legs and core. Multiple devices are group together to form a protective nested group to form a protective cover.

Abstract: A permeable breakwater for submerged offshore or seawall retentive installation includes a base and permeable opposed sides terminating at an upwardly projecting permeable wave wall. The breakwater is located offshore to cause moderate to heavy waves to break further offshore thereby dissipating their energy before reaching the beach.

Abstract: A permeable breakwater for submerged offshore or seawall retentive installation includes a base and permeable opposed sides terminating at an upwardly projecting permeable wave wall. The breakwater is located offshore to cause moderate to heavy waves to break further offshore thereby dissipating their energy before reaching the beach.

Abstract: An articulated erosion control system provides a flexing articulated mat comprising a plurality of blocks which interlock in a three dimensional fashion allowing a mat formed of the blocks to conform to changes in terrain. In the preferred embodiment there is provided at least one "lock block" (FIG. 1) having a plurality of open ended sockets spaced about the periphery thereof and at least one "key block" (FIG. 2) being connectable during operation to the lock block; the key block providing a plurality of locking arms spaced about and integrally formed with a central portion of the key block. Connection of the lock block and the key block can be achieved by relative vertical movement of the key block towards the lock block when the key block locking arm is superimposed over the open ended socket of the lock block--the connection being completed when a portion of the locking arm occupies at least in part the space within the socket.

Abstract: An articulated erosion control system provides a flexing articulated mat comprising a plurality of blocks which interlock in a three dimensional fashion allowing a mat formed of the blocks to conform to changes in terrain. In the preferred embodiment there is provided at least one "lock block" (FIG. 1) having a plurality of open ended sockets spaced about the periphery thereof and at least one "key block" (FIG. 2) being connectable during operation to the lock block; the key block providing a plurality of locking arms spaced about and integrally formed with a central portion of the key block. Connection of the lock block and the key block can be achieved by relative vertical movement of the key block towards the lock block when the key block locking arm is superimposed over the open ended socket of the lock block--the connection being completed when a portion of the locking arm occupies at least in part the space within the socket.