Map of downtown Portland near the Willamette River harbor wall, dated January 9, 1968. Map shows the extent of serious floods that took place in 1894 and 1948, with elevation data at intersections and other key points on the map. The map outlines detailed plans for caulking and sandbag operations along the harbor wall, in case of a flood. Harbor Drive is shown along the riverfront, from SW Columbia St. to the Steel Bridge. Visit City of Portland Archives for more https://efiles.portlandoregon.gov/record/16652