Related Links: Imagining Construction's Future Eddie Rodriguez stepped out of the car and onto the rough gravel parking lot of a huge construction site sprouting from the black dirt of the Iowa prairie. "Wow, this is no PowerPoint show," he said to himself.In class at Des Moines Area Community College, he had seen presentations and read articles on the construction of the Interstate Rail Transport System, or IRTS. But seeing the activity live all around him was a different experience entirely. He had just arrived with a letter of appointment from Prairie Associates and a brand-new union card from Local
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.