Abstract: Apparatus for a marine facility prevents silt from entering the facility and also provides spill containment. A floating barrier provides the containment and a flexible curtain attached to the barrier and having devices anchoring the curtain to the floor of the water prevents silt from entering the facility. The barrier rises and falls with the tides and openings in the curtain permits the tidal flow to enter and leave the facility. The apparatus is attached to fixed structure in a suitable manner. The barrier and curtain can be moved to permit passage of a ship.