Related Links: Production Tax Credit Extension Boosts Wind Sector Tomorrow's Energy: Hydrogen, Fuel Cells and the Prospects for a Cleaner Planet Peter W. Davidson, 54, a former investment banker and entrepreneur, is bringing the U.S. Energy Dept.'s 8-year-old Loan Programs Office (LPO) back to life following $527 million in controversial loans made to the solar-panel maker Solyndra, which declared bankruptcy in 2011. As executive director, Davidson oversees a 180-person staff and $50-billion loan budget for clean-energy projects, including nuclear power and advanced car technologies. Prior to leading LPO, Davidson was senior advisor for energy and economic development at the Port
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.