Yanba Dam

Yanba Dam (八ッ場ダム, Yanba damu) is a dam in Naganohara, Agatsuma District, Gunma Prefecture, Japan. Construction began in 1967, with effective completion in October 2019 and the official opening on 1 April 2020.

八ッ場ダム Yanba Dam
Location	Gunma Prefecture, Japan
Coordinates	36°33′25″N 138°42′51″E
Construction began	1967
Opening date	2019
Construction cost	532 Billion Yen
Dam and spillways
Impounds	Agatsuma River
Height	131 m
Length	336 m
Reservoir
Creates	Lake Yanba-Agatsuma
Total capacity	107,500,000 m³
Catchment area	707.9 km²
Surface area	304 hectares

Planning for the dam began in 1947, and it was planned to be completed by 2015. The dam's construction had seen sustained local opposition and a ballooning budget, and a change of National government in 2009 resulted in the project being halted, being about 70% completed at the time. Another change of government in 2012 resulted in the project being revived and subsequently completed.

Construction required the relocation of part of the Agatsuma Line, several roads and affected residents.

References

This article incorporates material from the corresponding article in the Japanese Wikipedia.