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Diversion System  
Diversion Tunnels
  Diversion tunnel
(No. 1)
Diversion tunnel
(No. 2)
Length 613 (m) 536 (m)
Internal diameter 13 (m) 13 (m)
Excavation diameter Apr. 15 (m) Apr. 15 (m)
Cross section shape Hexagonal Horseshoe
Lining type Concrete Concrete lining (walls)
Number of gates 2 -
Discharge Capacity 1800 (m3/s) 1500 (m3/s)
Surface Excavation 191634 (m3) 198046 (m3)
Underground Excavation 120562 (m3) 104583 (m3)
Concreting 55567 (m3) 42695 (m3)
Lifting system Gantry crane of 280 tons -

Diversion system application during operational period:
The diversion system can be used as drainage gallery.