Charts. Columbia River, Oreg.-Wash., St. Helens to Willamette River, including Vancouver and Portland, surveys to 1928, surveys by U. S. Engineers to Dec. 1931, surveys by Port of Portland to 1930, 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 1928, surveys by U. S. Engineers to Dec. 1931, surveys by Port of Portland to 1930, and other sources; chart 6154. Scale 1:40,000.
Display Title:
Charts. Columbia River, Oreg.-Wash., St. Helens to Willamette River, including Vancouver and Portland, surveys to 1928, surveys by U. S. Engineers to Dec. 1931, surveys by Port of Portland to 1930, and other sources; chart 6154. Scale 1:40,000.