Charts. Columbia River. Columbia River, Oreg.-Wash., Crims Island to St. Helens, surveys to 1924, surveys by U. S. Engineers to Nov. 1930, and other sources; chart 6153. Scale 1:40,000.
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Columbia River. Columbia River, Oreg.-Wash., Crims Island to St. Helens, surveys to 1924, surveys by U. S. Engineers to Nov. 1930, and other sources; chart 6153. Scale 1:40,000.
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Charts. Columbia River. Columbia River, Oreg.-Wash., Crims Island to St. Helens, surveys to 1924, surveys by U. S. Engineers to Nov. 1930, and other sources; chart 6153. Scale 1:40,000.