Guri Dam and Powerhouse
The Guri Dam is one of the largest hydroelectric facilities in the world. Atkinson completed this concrete gravity dam, increasing its size from 348 to 532 feet high and from 2,772 feet long to 4,314 feet long. The project also featured the construction of 8,050-megawatt, 10-unit powerhouse and the installation and testing of turbine generators. In total, the team placed 8,280,000 cubic yards of concrete.
To raise the operating level of the old reservoir, careful demolition of the existing top of dam and spillway piers was needed in order to splice the new design onto the old. Hydraulic and pneumatic breakers were used on the dam with controlled explosives and pneumatic breakers working the spillway. All this effort had to be accomplished while the existing powerhouse and spillway were in operation and in conjunction with low annual flows during the dry season.