RedactedNarrative: Vessel #1 was tied off to a line of boats upriver from Vessel's 2,3 and 4.  Vessel #1 attempted to pull anchor and began drifting downriver towards the next line of boats due to the current.  Vessel #1 drifted into and collided into vessel's 2, 3, and 4 causing damage to the vessels.  Vessel #1 then continued downriver after colliding with vessels 2,3, and 4.