The Southern Nevada Water Authority’s largest single contract to date just got a little pricier. Photo: Tony Illia For ENR Drier days Workers in 2010 in staging vault that later flooded twice. Photo: Tony Illia For ENR Tunnel-boring machine head will drill for three miles. A starter tunnel for a third raw water intake at Lake Mead flooded three times in six months last year, prompting its contractor, Vegas Tunnel Constructors LLC —a joint venture of S.A. Healy Co., Lombard, Ill., and Impreglio S.p.A., Sesto San Giovanni, Italy—to drill in a drier direction. Costs for the design-build project, awarded in
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.