Operator was crusing down the Columbia River in his 27' cabin motorboat with 4 passengers on board.  All were were wearing their lifejackets.  While near Camas Landing he struck an object underwater.  He was not sure what it was, it may have been a log or a rock.  The object damaged the outdrive and the boat completely lost power.  Operator made a call to the Coast Guard on his VHF radion and in about 10 minutes the Coast Guard and sheriff's deptuies were on scene.  They towed Operator to Camas Landing where he had launched.

There were no injuries and the damage to the boat was estimated at $6,000.
Camas                         