A proposal by a North Carolina artist is laying the foundation for what may become the largest in-situ residential soil-lead remediation project in the country. Artist Mel Chin’s work often brings site-specific art to unlikely places, including destroyed homes and landfills. He has worked with scientists in the past to create gardens of hyperaccumulators—plants that draw heavy metals from soil. Now he is attracting academic, engineering and social resources to ask Congress for $300 million to address soil-lead contamination in New Orleans. Photo: Pam Radtke Russell Chin’s Operation Paydirt would be the largest urban soil cleanup in the U.S. Although
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.