沈ちん下か橋ばし

noun

submersible bridge; low-water bridge

A bridge designed to be submerged during floods, common in rural areas with seasonal water level changes.

• 四し万まん十と川がわには沈ちん下か橋ばしがいくつか架かかっている。

  There are several submersible bridges over the Shimanto River.