The tailwater area pool associated with the Onalaska dam project at normal elevation. This photograph was taken from a point on line with the north side of the Burlington Railroad depot and at a point located on the embankment shoulder about 13 feet from the westerly rail, with a headwater elevation of 638.90 and a tailwater elevation of 631.35. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area pool associated with the Onalaska dam project at normal elevation. This photograph was taken from a point on line with the north side of the Burlington railroad depot and at a point located on the embankment shoulder about 13 feet from the westerly rail, with a headwater elevation of 638.90 and a tailwater elevation of 631.55. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area pool associated with the Onalaska dam project at normal elevation. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area pool at normal elevation, part of the Onalaska dam project. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area pool at normal elevation, part of the Onalaska dam project. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area pool at normal elevation, part of the Onalaska dam project. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A chain link fence runs in front of the tailwater area at normal elevation, part of the Onalaska dam project. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A chain link fence runs along the dike at the tailwater pool at normal elevation, part of the Onalaska dam project. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A general view of the pool at normal elevation, part of the Onalaska dam construction project. Construction of the Onalaska dam was undertaken as a part of improvements to the Upper Mississippi River.
A general view of the pool at normal elevation, part of the Onalaska dam construction project. Construction of the Onalaska dam was undertaken as a part of improvements to the Upper Mississippi River.
Discharge through the culvert section pool of the Onalaska dam at normal elevation. The Onalaska dam construction project was undertaken as a part of improvements to the Upper Mississippi River.
A man and a dog perch on top of the upstream side of the culvert section of the Onalaska dam, gage 633.64. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A man and a dog perch on top of the downstream side of the culvert section of the Onalaska dam, gage 631.65. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A man and his dog perch on a distant section of the Onalaska dam between upstream gage 633.64 and downstream gage 631.65. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area at the completion of the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area at the completion of the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Stones added by the corps are visible along the tailwater area of the Onalaska dam project at completion. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area of the Onalaska dam project is visible beyond the railroad spur run to supply the construction. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The tailwater area at the completion of the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Piles are visible at the tailwater area at the completion of the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Trees and buildings at the tailwater area following the completion of the Onalaska dam contract. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Buildings are hidden behind the trees overlooking the tailwater area following the completion of the Onalaska dam contract. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A small amount of snow covers the stones at the tailwater area following the completion of the Onalaska dam contract. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Culvert section of the Onalaska dam, looking downstream at the completed dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Culvert section of the Onalaska dam, looking downstream at the completed dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A typical section of the upstream face of the dike from the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A typical section of the downstream face of the dike from the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A general view of the upstream face of the dike at the Onalaska dam following the completion of the contract. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A general view of the downstream face of the dike at the Onalaska dam, after the contract was completed. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Two distant figures walk along the top of the submergible section of the dike at the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A view of the Onalaska dam following the completion of the contract. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A view of the rail spur at the Onalaska dam focuses on the pool area immediately upstream from the dam, looking downstream in the direction of the dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A truck sits across the gravel surface of the access road at the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The junction of the dike and the submergible section at the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Typical grouted derrick stone at the face of the submergible section of the dike at the Onalaska dam. The Onalaska dam construction was undertaken as part of improvements to the Upper Mississippi River.
An Illinois Central rail car is visible at the Onalaska dam and associated works. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
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.
Earth fill dike nearing completion at the Onalaska dam. The Onalaska dam construction project was undertaken as a component of improvements to the Upper Mississippi River.
Progress on the construction of the Onalaska dam. The Onalaska dam construction project was undertaken as a component of improvements to the Upper Mississippi River.
The downstream headwall and stilling basin of the Onalaska dam. The Onalaska dam construction was undertaken as a part of the improvements to the Upper Mississippi River.
The upstream headwall of the Onalaska dam with the cofferdam fill partially removed. The Onalaska dam construction project was undertaken as a part of the improvements to the Upper Mississippi River.
The downstream apron of the Onalaska dam, complete. The Onalaska dam construction project was adopted as a part of improvements to the Upper Mississippi River.
Placing derrick stone at the submergible section of the Onalaska dam. The Onalaska dam construction project was undertaken as a part of improvements to the Upper Mississippi River.
Boards are placed along the center of the section between headwalls at the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Workmen walk through the work area beside the section between headwalls, part of the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The elevation of the downstream headwall at the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The dike at the Onalaska dam, beyond the steel pilings. The Onalaska dam construction project was undertaken as a part of improvements to the Upper Mississippi River.
Cranes are visible at the Onalaska dam under construction. The dam construction project was undertaken as a part of improvements to the Upper Mississippi River.
Removing sand fill at the downstream arm of the cofferdam at the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
A general view of the equipment and scaffolding used to construct the Onalaska dam, still in progress. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Two cranes and a bin are visible in this photograph of the dike at the Onalaska dam, still under construction. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Progress continues on the Onalaska dam with the derrick stone in place. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
The culvert wall takes shape as part of the Onalaska dam project. The Onalaska dam was constructed as part of improvements to the Upper Mississippi River.
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.
The dewatering system at the Onalaska dam discharges on the downstream side of the cofferdam. The Onalaska dam was constructed as part of improvements to the Upper Mississippi River.
Workmen place concrete for slabs, 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 through the equipment in and around the dike, constructed as part of the Onalaska dam. The Onalaska dam project was undertaken as a part of improvements to the Upper Mississippi River.
Loading a wagon scraper at the borrow pit, part of the Onalaska dam project. The Onalaska dam was built as part of Upper Mississippi River improvements.
Workmen dump the wagon scraper, part of the construction of the Onalaska dam. The Onalaska dam project was undertaken as part of Upper Mississippi River improvements.
Grading with a bulldozer, part of the construction of the Onalaska dam. The Onalaska dam project was undertaken as part of improvements to the Upper Mississippi River.
A train car waits beside the cofferdam, part of the construction of the Onalaska dam. The Onalaska dam was constructed as part of Upper Mississippi River improvements.
General view of equipment within the cofferdam, part of the Onalaska dam project. The Onalaska dam underwent construction as part of Upper Mississippi River improvements.
Workmen set up aggregate bins at the cofferdam, part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
A crane operates on common excavation and disposal of material below the cofferdam, part of the Onalaska dam project. The Onalaska dam underwent construction as part of Upper Mississippi River improvements.
Men set up a pump for disposing of common excavation below the cofferdam, part of the Onalaska dam project. The Onalaska dam underwent construction as part of Upper Mississippi River improvements.
Workmen use a hose inside the cofferdam in this photograph, which shows the condition of the lower elevation. The cofferdam is part of the Onalaska dam project and underwent construction as part of Upper Mississippi River improvements.
Permanent steel sheet piling in place within the cofferdam, part of the Onalaska dam project. The Onalaska dam underwent construction as part of Upper Mississippi River improvements.
Men work on the hydraulic stripping of top soil inside of the cofferdam as part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
A general view of the unwatered cofferdam, part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
A sub contractor places cofferdam fill while workers look on from the rail spur as part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
A general view of the cofferdam with the river elevation above the cofferdam at 637.9. The cofferdam is part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
A general view of the cofferdam under high water conditions. The cofferdam is part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
A general view of the cofferdam under high water conditions. The cofferdam is part of the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
Construction of the cofferdam nearing completion at the Onalaska dam, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
Burning brush in the dike area of the cofferdam for the Onalaska dam project, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
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.
Progress in the cofferdam construction at the Onalaska dam, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
Clearing operations at the dike section of cofferdam at the Onalaska dam, under construction on the Upper Mississippi as part of Upper Mississippi River improvements.
Permanent piling for submergible dike to be used for cofferdam 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.
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.
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.