RedactedNarrative: Cruising down-stream from the Lake fire works show on the Spokane River near Highway 95 bridge. A dark colored wooden boat over took us within 20 feet creating a large wake that swamped vessel remained afloat, the engine and bilge pump did not work. A pontoon boat towed vessel to Blackwell Island boat launch. Recovered vessel onto trailer and drained water. Non-injury accident. No additional information on wooden boat.