A system and method to provide water and sediment flow through a dam or rock jetty, including a plurality of flow pipes positioned through the dam or jetty to receive water carrying sediment and a principal flow pipe to receive flow from the plurality of flow pipes and to deposit water and sediment a predetermined distance to the rear of the dam or jetty. A continuous trough may be mounted on the jetty forward face to efficiently capture water and sediment at entrances of the plurality of flow pipes. A system and method is also provided to suppress wave action against a shoreline and to collect sediment to build up the shoreline, comprising shelves extending out from a front wall of each body section, below a plurality of flow pipes, the shelves for shearing a wave and dispersing and using wave energy to direct sediment through the flow pipes.