Related Links: U.K. Takes a Hard Look at Private Finance Initiative Private Funding Finds a Way into Other Public Spaces P3 Special Report: U.S., Canada, U.K. Push New Finance Approaches In the mid-1990s, two highway projects oneither side of the country helped to create a paradigm shift in the way U.S. infrastructure improvements would be financed. Dulles Greenway in northern Virginia and state Route 91 Express Lanes in Los Angeles were designed and built almost entirely with private funds, giving rise to what would become public-private partnerships, or P3s.Enthusiasm and skepticism greeted both projects. While some saw the nascent P3s
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.