RedactedNarrative: unit 1 was drifting with the incoming tide towards the railroad trestle that crosses over rantowles creek. The operator realized how close unit 1 was making contact with the trestle and attempted to quickly throttle away from the trestle. Due to the strength of the current the operator was able to get the bow turned away from the trestle but the starboard stern area of unit 1 struck the upright concrete san steel supports of the trestle.