Nautical charts. Columbia River, Oreg.-Wash., St. Helens to Willamette River, including Vancouver and Portland, surveys to 1938, surveys by U. S. Engineers to Nov. 1939, surveys by Port of Portland to 1937 and other sources; chart 6154. Scale 1:40,000.
Publication Title:
Columbia River, Oreg.-Wash., St. Helens to Willamette River, including Vancouver and Portland, surveys to 1938, surveys by U. S. Engineers to Nov. 1939, surveys by Port of Portland to 1937 and other sources; chart 6154. Scale 1:40,000.
Display Title:
Nautical charts. Columbia River, Oreg.-Wash., St. Helens to Willamette River, including Vancouver and Portland, surveys to 1938, surveys by U. S. Engineers to Nov. 1939, surveys by Port of Portland to 1937 and other sources; chart 6154. Scale 1:40,000.