RedactedNarrative: Operator and Occupant were traveling with the current in the Palmer river to go duck hunting.  Due to the way they had the equipment stacked in the boat the realized they would not be able to make under the trestle.  Operator put the boat in reverse to hold it against the current while Occupant moved equipment.  The stern of the boat struck the one of the trestle supports and the boat capsized.  Both subjects fell into the water, neither were wearing PFDs.  Occupant was able to grab a bag of decoys and swim to shore while Operator was able to get on top of the capsized boat.  He was later removed from the boat by EMS.  Occupant was transported to the hospital with complaints of chest pain but left before being seen due to a 7 hour wait at the ER.  The boat and all their equipment were recovered later in the day.