Protection stone at the upstream face of the submergible dike, part of the construction of the Onalaska dam. The Onalaska dam construction project was undertaken as a component of improvements to the Upper Mississippi River.
Protection stone at the downstream face of the submergible dike, part of the construction of the Onalaska dam. The Onalaska dam construction project was undertaken as a component of improvements to the Upper Mississippi River.
A crane removes a wing dam along the Upper Mississippi River in St. Paul, Minnesota, part of general improvements to the St. Paul harbor, Mississippi River, and surrounding waterways. Work on the project was completed in 1936.
A crane removes a wing dam along the Upper Mississippi River in St. Paul, Minnesota, part of general improvements to the St. Paul harbor, Mississippi River, and surrounding waterways. Work on the project was completed in 1936.
Rip rap is visible along the Mississippi embankment in St. Paul, part of a project to dredge and improve the St. Paul harbor and Upper Mississippi River. The project was completed in 1936.
The upper end of the left bank of the St. Paul harbor improvement project is visible in this photograph, taken after the project was completed in 1936. The improvements can be seen below the Chicago, Milwaukee, St. Paul and Pacific Freight building, with the rail yard in the distance.
The Robert Street Bridge and Farwell, Ozmun, and Kirk building are visible in this photograph of the city of St. Paul from the Upper Mississippi River, taken as part of the St. Paul harbor project. River and harbor improvements included dredging and other improvements to the Upper Mississippi River in and around the city of St. Paul, Minnesota. The project was completed in 1936.
The lower half of a rubber shouldered pump case on the "William A. Thompson" is shown after pumping 1,042,072 cubic yards of the Upper Mississippi. This pump case has the rubber shoulder, suction side, in place. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The lower half of a rubber shouldered pump case on the "William A. Thompson" is shown after pumping 1,042,072 cubic yards of the Upper Mississippi. This pump case has the rubber shoulders removed. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The lower half of a rubber shouldered pump case on the "William A. Thompson" is shown after pumping 1,042,072 cubic yards of the Upper Mississippi. This photograph shows the rubber shoulder, engine side, in place. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
Sections of rubber shoulder liners from the Dredge "William A. Thompson" . These rubber shoulder liners were removed after pumping 1,042,072 cubic yards of the Upper Mississippi. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The upper half of a rubber shouldered pump case on the Dredge "William A. Thompson" . This photograph was taken after the dredge pumped 1,042,072 cubic yards of the Upper Mississippi. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The suction sidehead and cast liner of a rubber shouldered pump case from the Dredge "William A. Thompson" . This photograph was taken after the dredge pumped 1,042,072 cubic yards of the Upper Mississippi and its tributaries. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The impeller of a rubber shouldered pump case from the Dredge "William A. Thompson" . This photograph was taken after the dredge pumped 2,178,557 cubic yards of the Upper Mississippi and its tributaries. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The rubber impeller liner of a rubber shouldered pump case from the Dredge "William A. Thompson" . This photograph was taken after the dredge pumped 1,042,072 cubic yards of the Upper Mississippi and its tributaries. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
The lower half of a rubber shouldered pump case on the "William A. Thompson" is shown after pumping 1,042,072 cubic yards of the Upper Mississippi. This photograph shows the rubber shoulder, engine side, removed. Dredge "William A. Thompson" is a cutter-head dredge used on the Upper Mississippi and tributaries from 1937 to 2005. It is named for "William A. Thompson" (1864-1925), an engineer with the U.S. Army Corps stationed in Fountain City in 1896 and charged with river improvements on the Upper Mississippi.
A C.B. & Q. spur track for delivery of materials to the Onalaska dam, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
Stabilizing fill is placed against the river side of the lower section of the retaining wall adjacent to the Robert Street Bridge. The retaining wall was constructed as part of improvements to the St. Paul harbor and Upper Mississippi River in and around St. Paul, Minnesota in the mid-1930s. The project was completed in 1936.
The excursion steamer Capitol is visible in this photograph of the embankment area adjacent to the landing below the Robert Street bridge. This photograph was taken to document improvements to the St. Paul harbor and Upper Mississippi River in St. Paul, including retaining walls, dredging, and sewer work.
A general view of the Upper Mississippi River and St. Paul harbor before work on improvements was underway. This photograph was taken as part of a project including dredging and other improvements in and around the city of St. Paul. Work was completed in 1936.
The Mississippi and the St. Paul municipal airport were photographed as part of the preliminary stages of work on the harbor and Upper Mississippi River. Improvements included dredging and other projects in and around the city of St. Paul. Work was completed in 1936.
The hangars and fields of the St. Paul municipal airport can be seen beyond the Mississippi River in this photograph, taken as part of preliminary work before improvements to the harbor and Upper Mississippi River. This project included dredging and other improvements in and around the city of St. Paul. Work was completed in 1936.
Permanent piling and preparations for construction at the Onalaska dam, under construction on the Upper Mississippi as part of Upper Mississippi River improvements. To drive piling for this cofferdam it was necessary that a crane be moved over the ice, or that the ice be cut and moved through the water on a barge. An unusual procedure was adopted. The snow was cleared back from the surface of the ice and piled up to form a cofferdam. This cofferdam was flooded artificially and the water permitted to freeze. By successively flooding and permitting the water to freeze, the ice was built up to a thickness sufficient to permit running the crane across the ice.
Driving steel sheet piles for the cofferdam at the Onalaska dam, under construction on the Upper Mississippi as part of Upper Mississippi River improvements. In order to move the crane across the ice, a cofferdam was built by piling snow and artificially flooding the cofferdam, then freezing the flood until the ice was thick enough for the crane to move across it.