On 10/05/2013, at about 6:00 a.m., these vessels were operating on the Columbia River near Pasco WA located in Franklin county.   

operator of V2, reported that he was traveling upriver from the Ringold boat launch.  It was dark and he had all of the vessel's running lights operating as well as two spotlights on the top of the cab facing forward.  A few miles above an area referred to as Jap Slough, he encountered fog.  Operator2 slowed down and moved to the right in order to keep the land in sight by using the spotlights.  After a minute or so he lost sight of land altogether but was still moving slowly (5-10 mph) to the right.    

At this point, V1 operated by Operator1, crossed over behind V2 and ran up on the back of the vessel.  The front bow of V1 got wedged up under the hard top of V2.  The weight of the boat (V1) was pushing the transom of V2 down and under water so Operator2 moved to the shore to keep from sinking. 

After removing V2 from the water, Operator2 and his passengers bailed water by hand and used the bilge pump getting the boat back afloat.  Operator2 called friends to come from town and tow the vessel back to the ramp and load it back on its trailer. 

Operator2 reported, through conversation with Operator1, that Operator1 had never launched at Ringold before and was following behind Operator2 to get up river.  Operator1 acknowledged that he was going too fast and was following V2's wake in the dark and did not see the lights on the boat until the last minute.
 
No injuries or fatalities.
There was no apparent alcohol involvement.
V1 reported no damages.  V2 estimated $22,500 in damages.
It is unknown if the Operator of V1 was wearing a PFD.  No one on board V2 was wearing a PFD.
Operator of V1 did not have a Mandatory Boater Education Card - age exempt.  Operator of V2 did have a Mandatory Boater Education Card.
Rules of the Road Violation - No Proper Lookout 
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Pasco