信濃川の治水と発電施設の水量調整を目的に、建設省と国鉄の共同事業として1990年に完成した堰です。長岡市と小千谷市を結ぶバイパスの役割も果たしています。隣接する自転車歩行者道から堰を見ることができます。
This weir was completed in 1990 as a joint project of the Ministry of Construction and Japan National Railways for the purpose of flood control of the Shinano River and water volume adjustment for power generation facilities. It also serves as a bypass connecting Nagaoka City and Ojiya City. The weir can be seen from the adjacent bicycle and pedestrian path.