Within a few seconds in mid-December, engineers at a new research facility in Vicksburg, Miss., sealed a 2,000-cu-ft-per-second torrent of water pouring through a 40-ft-wide, eight-ft-deep levee breach using a 100-ft-long, 15-ft-dia., air- and water-filled fabric tube rolling in the stream. Photo: Angelle Bergeron For ENR Full-scale trials of a 100-ft-long levee plug at a new test facility in Vicksburg show technology and techniques for rapidly sealing levee breaches are ready for business, but funds are lacking. Graphic: Courtesy ERDC A 2.2-million-gal source pool and collapsible weir on the test basin simulate a breach. Related Links: Ready To Roll: Levee
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.