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Introduction of facilities > Kyu-Yoshinogawa Estuary Barrage

Kyu-Yoshinogawa Estuary Barrage

Kyu-Yoshinogawa Estuary Barrage

The Kyu-Yoshinogawa Estuary Barrage is located in Nakagirai, Matsushige Town (both of the right and left banks), which is closer to the sea than the Imagiregawa Estuary Barrage and close to Tokushima Airport.
The estuary barrage consists of one lock gate to let ships through, five water control gates, one regulating gate and two fishways on the right and left sides.

Location Right bank Nakagirai, Matsushige Town, Itano-gun, Tokushima
Left bank Same as above
Estimated high-water level T.P. + 2.947 m
Estimated high-water discharge 800 m3/sec.
Barrage length 192.3 m (movable part: 178.3, fixed part: 14.0)
Barrage height T.P. + 1.767 m
Foundation height T.P. - 5.533 m
Water gate length 168.3 m
Water gate Gate Flood control gate
1 over flow shell type double leaf wheel gate
25.0m in span x 7.3m in height
Regulating gate:
5 steel shell type wheel gates
25.0m in span x 7.3m in height
Lock gate Effective
width x length
7.3 m x 25.0 m
Gate 2 wheel gates
7.3m in span x 7.3m in height
Fishway Gate 2 flap gates
5.5m in span x 1.812m in upright height
Incorporated Administrative Agency Japan Water Agency
Incorporated Administrative Agency Japan Water Agency
Kyu-Yoshinogawa Estuary Barrages Management Office

841 Enokize, Kawauchi-cho, Tokushima-shi, Tokushima 771-0144 Tel: 088-665-1435 Fax: 088-665-1374
E-mail: kyuyoshi@mbs.sphere.ne.jp