RedactedNarrative: Operator states that he was operating his vessel south bound on the southern branch of Elizabeth River.  As he approached the Gilmerton Bridge, he contact the bridge tender and was informed that the bridge would remain open for her vessel to pass through.  As the vessel was passing through the bridge the tender started to lower the draw spans.  The vessel struck the bridge causing damage to a sail and a cable mast stay.  According to operator, the tender stated that she confused his vessel with another and thought they were clear.