A Scotland-based utility has secured government approval to build a 10-MW demonstration marine power farm that will use a novel turbine to harness the kinetic energy of tidal streams. Installation of the 10 units off Scotland’s west coast is scheduled to start in 2013, following prototype testing at the European Marine Energy Centre in Orkney starting at the end of this year. Photo: Courtesy of ScottishPower Renewables A 300-MM prototype of the 1,000-MW Scottish machine was installed off Norway some eight years ago. Photo: Courtesy of ScottishPower Renewables Innovative HS300 turbine capitalizes on the kinetic energy of tidal streams. The
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.