George Lamphere, former president of Washington, D.C.-based contractor Charles H. Tompkins Co. (later known as Tompkins Builders Inc.) and a builder of many city and area landmarks, died on Dec. 10, 2010, in Kensington, Md. Lamphere was 79 years old. He had suffered from Alzheimer’s disease, according to The Washington Post. LAMPHERE Lamphere, who joined the firm in 1954, served as president from 1985 until retiring in 1996. Tompkins became a subsidiary of contractor J.A. Jones Inc., Charlotte, N.C., in the early 1970s and was acquired by Turner Construction Co., New York City, in 2003, when Jones filed for bankruptcy.
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.