RedactedNarrative: Boat one (1999 20' Pontoon Boat) was traveling down lake just past Holladay Bridge.  Fog conditions were bad and made visibility poor.  Boat one struck Boat two (2008 23' Pontoon Boat) on back of motor.  115 HP Yamaha outboard motor belonging to boat two was damaged.  Boat one received a dent to the middle pontoon where the bow eye is located. Boat two was towed from the scene due to it being disabled from the incident.