Picket bulkheads are less expensive to build but don’t last as long as concrete structures. Rock revetments and rock seawalls will also be less expensive, but they allow fine sediment being sucked out from the rocks, which might impact the composition’s stability and generate the necessity for repairs or reinforcement. https://archerbncwt.blogproducer.com/34545664/everything-about-sandstone-repairs-north-shore