PUEBLO COUNTY, Colo. (CBS4/AP) – An Aurora man and his son drowned on Father’s Day during a rafting trip on the Arkansas River in Pueblo County. Officials say 46-year-old Ricardo Valencia Sanchez and his 16-year-old son, Jose Louis Valencia, were wearing life vests when they were thrown from a raft — but they got trapped in the backwash from a dam.

Police say they emergency crews responded to the area near 4 Reservoir Road and the river at around 1:24 p.m. on Sunday.

READ MORE: Evacuations Ordered For Sylvan Lake State Park Visitors, Some Eagle County Residents Due To Wildfire

Arkansas River (credit: Facebook/Buena Vista Chamber of Commerce)

Officials say the strong currents near the dam forced them underwater for several minutes and they became entangled in a rope.

“Just that current, he was trying to swim for his life, but clearly it took him away,” said one witness. “I’m never going into these waters, that’s my advice to everyone, don’t get in these waters.”

READ MORE: How Cycling 29,029 Vertical Feet During 24-Hour Summer Solstice Ride Is Helping Fight Homelessness

Emergency responders pulled the raft to shore about a mile downstream. The father and son were pronounced dead at the scene. A third person in the raft survived.

There have now been at least 10 water deaths in Colorado in the last few weeks.

MORE NEWS: Growing Wildfires Trigger Air Quality Alert Including Vail, Glenwood Springs, Craig And Meeker

(© Copyright 2020 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)