The next time there is a levee breach in San Joaquin County, Calif., Ronald Baldwin, the county’s director of emergency operations, would like to have some huge rubber tubes pre-positioned at Interstate underpasses, rail embankments and other strategic locations to contain flooding. Photo: Angelle Bergeron In the arch and PLUG combination, flow is first stopped by floating in the incompressible tube, and the arch then is settled around it to create a cofferdam. PLUG can then be removed and repairs made. Graphic: Oceaneering Inc Photo: Angelle Bergeron The arch-tube configuration can be used to block off larger waterways, as long
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.