It may seem as though the number of immigrants on the Gulf Coast has grown since Hurricane Katrina created a need for workers, but there is no hard evidence to determine the population of immigrants, documented or undocumented, says Temple Black, spokesman for U.S. Immigration and Customs Enforcement. Photo: Sam Barnes Some feel that the construction industry is exploiting Hispanic workers by paying insufficient wages. Photo: Sam Barnes Immigration officials say that there is no hard evidence to determine the population of immigrants, documented or undocumented, along the Gulf Coast. “If we knew where the illegals were, we would go
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.