The PSP is located in the Hajar Mountains, some 140km southeast of the city. The contract calls for the construction of a 36m-diameter, 70m-deep turbine shaft to house two Francis turbines with a power output of 250MW. A 1.2km-long pressure tunnel will connect the existing lower reservoir to the new upper reservoir. The project also calls for two drill-and-blast road tunnels of 470m and 440m respectively and other ancillary structures.