Operator was out on the Columbia River anchored in his 16' Glastron open motorboat.  While pulling up the anchor line, the boat spun and then fouled up the prop with the stern facing upstream into the current.  The strong current and taught anchor line pulled the stern underwater in seconds and sank the boat.

Operator/owner was taken to the hospital for mild hypothermia and released within an hour.  The boat was found and retrieved
Pasco                         