booms of any length can be constructed and hinged together to follow a coastline along a preplanned and surveyed route turning now to fig1 12 one way to accomplish vertically movable connection of the host boom to a vertical pile is to utilize pairs of the vertical piles as u201c pin piles u201d that are placed on opposing sides of the host boom to hold the boom in the designed alignment the horizontal spacing of the pin piles is an engineering calculation relative to location the pin piles serve as mooring piles to allow the boom to move in a vertical movement with the sea state and or tidal conditions additionally permitting the host boom to be lowered to the sea floor and raised to the waterline at need the vertical piles can be configured in either u201c single u201d or u201c cluster u201d e g three pile configuration permitting configuration of individual pin piles or clustered pin piles as needed the determination of single pile or cluster pile is a function of engineering for lateral support for mild or severe sea state conditions referring particularly to fig1 additional or alternative rigid boom containment systems 200 a 200 b and 200 c can employ vertical pile clusters 202 at one or more locations along a host boom section 206 e g thirty six inches in diameter the vertical pile clusters 202 can be composed of a number e g three of vertical piles of suitable material e g steel wood etc clustered together so as to be touching one another and or be.