RedactedNarrative: Boat A had left Sunset Bay and was heading down lake/river.  Boat A was too close to the south Columbia County shoreline and ran into the end of a pier and a boat on a t lift causing damage to the pier/lift/boat as well as damage to itself.  Operator stated that he was going approximately 30 mph at the time of the collision.  Operator also stated that it was after dark and that he normally headed towards a light on the far side of the lake however must have picked the wrong light to drive towards.  Operator stated that he had an electronic fish finder/GPS operating at the time and that the glow coming from the screen made it difficult to see.  Operator and companions had been at a bar in Sunset Bay prior to heading back out on the lake to go home.