NOAA Chart 18525: Columbia River Saint Helens to Vancouver, 37.9 X 22, WATERPROOF Printed on high quality waterproof and tear-resistant material by NOAA Chart Agent, Paradise Cay Publications Paradise Cay Publications brand charts are sold exclusively by Ruby & Rudy's Books Always printed on demand using the most recent data from NOAA Prepared to be display quality. Shipped rolled in a cardboard tube.