RedactedNarrative: Narrative- A passerby on the Hwy 189 informed Deer Creek State Park entrance staff of a capsized boat on Deer Creek Reservoir. Staff notified the park ranger, who notified dispatch, then proceeded to the area by boat to investigate. Wasatch County Deputies and a Utah Highway Patrol officer responded to the area to attempt to locate the possible capsized boat from the highway. OPERATOR1's boat had swamped then capsized due to water coming over his low transom. GOOD SAM saw and heard OPERATOR1 calling for help and towed the capsized boat into shore with OPERATOR1 holding on. The State Park Ranger found the boat on shore and discovered what had occurred. OPERATOR1 was treated for a low core body temperature of 93 degrees as the water temperature was approximately 58 degrees. OPERATOR1 stated that he was adrift in the middle of the lake, and was trying to untangle some fishing tackle. The wind was blowing at 10+ mph to the north and OPERATOR1 heard his bilge pump trying to pump water out. Water overcame the short transom at the rear of the boat, swamping the boat. OPERATOR1 was wearing a PFD the whole time. He attempted to swim the swamped boat to shore, but the boat soon capsized in the wind. He held on to the boat and called for help for about 10 minutes, when GOOD SAM came and towed him to shore. It appeared that due to the low transom, the operator seated at the back of the boat, a large 20 Hp 4 stroke motor, a full 5 gallon gas tank, and a battery all at the back of the boat, that the rear weighting of the boat made it more likely for the boat to take on water quickly and cause it to swamp. OPERATOR1 was treated in an ambulance to try and increase his body temperature. His boat was towed to the dock and loaded on his trailer for him.