Maintenance and compliance remain the primary drivers for environmental infrastructure projects in the U.S. However, although funding remains a challenge for many communities, sentiments about the sector’s prospects are, on the whole, upbeat. Photo: Arcadis More private firms are outsourcing site remediation oversight. Related Links: View More on Top 500 Sourcebook 2010 View Complete Top 500 Sourcebook 2010 with Data and Analysis “It looks stable and strengthening, even though there aren’t many opportunities for new facilities right now,” observes Dan Batrack, CEO of Pasadena, Calif.-based Tetra Tech, whose firm is designing a $564,000 disinfection facility at the Birmingham Wastewater Treatment
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.