RedactedNarrative: Vessel 1 was rented from Lake Springfield Marina.  Vessel 1 was at anchor east of the Railroad Bridge, until it was time to return to marina.  Vessel 1 pulled anchor and began to travel west towards the marina.  As Vessel 1 travelled under the Railroad bridge, the bimini top was up and struck the Railroad bridge.  The impact damaged the bimini top and pulled the pontoon boat railing from the boat floor.  Vessel 1 returned to the marina and the staff was informed of the damage.