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
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.