Not much yet, sounds like a rafting accident:
9NEWS.com | Colorado's Online News Leader | 1 drowned, 2 missing on Arkansas River
"SALIDA - At least one person has drowned and authorities are searching for two more after a rafting accident on the Arkansas River.
The accident happened on Tuesday afternoon on the stretch of the river between Leadville and Buena Vista, according to Colorado State Parks.
A total of four people were in the raft, part of a private group, when the accident happened.
Authorities have confirmed that one person is dead and are searching for two others near the launch area of a part of the river called the Numbers.
The fourth person was taken to a hospital in Salida.
The names of the victims were not immediately released."
Condolences to those involved.