RedactedNarrative: On 5/30/2015 at Approximately 1900, the operator of vessel 1 drove his up the Platte River from the Bridge of the Main Park Road of Chatfield State Park, Littleton, Douglas, Colorado. Operator unbolted the windshield of vessel 1 in order to fit under the bridge due to high water and flood conditions. As Vessel 1 headed upstream in flood conditions it hit a submerged object, causing the loss of power to the motor. Vessel 1 than partially capsized and both the operator of vessel 1 and his dog entered the water. The operator of vessel 1 was not wearing a PFD as he entered the water during flood conditions. The operator of vessel 1 and his dog were swept downstream from vessel 1. Vessel 1 was capsized and pinned against a downed tree. The operator of vessel 1 swam downstream for an estimated 20 minutes before he reached the bridge at the main park road, where he was contacted by Chatfield State Park Staff.  Approximately two weeks later 6/14/2015, vessel 1 was recovered from the Platte river.  On 7/9/2015  vessel 1 was returned to operator 1.