This photograph illustrates a typical section of rip rap, part of the St. Paul harbor project of the mid-1930s. Improvements to the harbor and Upper Mississippi River included dredging and work on the Phalen Creek sewer. The project was completed in 1936.
The complete upstream apron, part of the construction of the Onalaska dam. The Onalaska dam project was undertaken as part of improvements to the Upper Mississippi River.
Workmen move supplies prior to placing fill in the retaining wall below the Robert Street bridge. The retaining wall was part of general improvements to the St. Paul harbor and Upper Mississippi River in and around the city of St. Paul, Minnesota. Work on the project was completed in 1936.