On 07/14/2013, at about 1:30 p.m., this vessel was drifting on the Cowlitz River about 1/2 mile upstream from the Blue Creek launch located in Lewis county WA.   

It was reported that a branch was overhanging the water.  As the boat drifted, it struck the branch raising the port side of the vessel causing the starboard side to lower.  The vessel overturned ejecting all three occupants.  The vessel sunk but was later recovered. 

No injuries or fatalities. 
There was no apparent alcohol involvement. 
Damages were estimated at $2,000. 
The operator was not wearing a PFD.  The report indicates that one person on board was wearing a PFD but it does not indicate who. 
The operator did not have his mandatory Boater Education Card. 
There was a Rules of the Road Violation - No Proper Look-Out.
Salkum