Ben Nielsen catches a standing wave on the South Platte.

(Michael Hughes/CPR News)

You would be forgiven for thinking that Colorado and surfing don't really go together. Except they do on the South Platte River, in a symbol of the river's improving health.

Ben Nielsen and his surfboard beside the South Platte.

(Michael Hughes/CPR News)

A $15 million project is going on right now along a one-mile stretch of the river near Denver to enhance flood control, wildlife, and recreation -- including hangin' 10. We visited River Run Park in Sheridan, which isn't even a year old, to meet its designer Ben Nielsen, who also happens to be a skilled river surfer.