XIAOLANGDI MULTIPURPOSE DAM, INTAKE & OUTLET STRUCTURES, TUNNELS Facts Project Description The Xiaolangdi Multipurpose Dam is located on the Yellow River. The channel of the river upstream of the dam site is a narrow valley of 500 to 800 m wide. Intake & outlet structures, 10 tunnels for water & sediment discharge, tunneling for flood spillway. INTAKE TOWERS: 4,535,000 m3 - open excavation 825,450 m3 - concrete 34,100 tons - steel reinforcement TUNNELS: 3 diversion / orifice tunnels: 14.5 m int. diameter, total length 3,408 m 3 sediment tunnels: 6.5 m int. diameter, total length 3,084 m 3 free-flow tunnels: 10.0 m inside widht, total length 3,019 m 1 irrigation tunnel : 250.0 m length, 3.5 m int. diameter 6 power tunnels: 50.0 m each, total length of 300 m, 7.8 m int. diamete

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