Yamba Dam

{{Infobox dam

| name = 八ッ場ダム
Yamba Dam

| image = Yanba Dam 2020-02-09 2.jpg

| image_caption =

| name_official =

| dam_crosses = Agatsuma River

| dam_type = Gravity

| res_name = Lake Yamba-Agatsuma

| location = Gunma Prefecture, Japan

| dam_length = {{convert|336|m|abbr=on}}

| dam_height = {{convert|131|m|abbr=on}}

| dam_width_base =

| construction_began = 1967

| opening = 2019

| cost = 532 Billion Yen

| res_capacity_total = {{convert|107,500,000|m3|abbr=on}}

| res_catchment = {{convert|707.9|km2|abbr=on}}

| res_surface = 304 hectares

| coordinates = {{coord|36|33|25|N|138|42|51|E|type:landmark_region:JP|display=inline,title}}

| extra =

}}

{{nihongo|Yamba Dam|八ッ場ダム|Yamba damu}} is a dam in Naganohara, Agatsuma District, Gunma Prefecture, Japan. Construction began in 1967, with effective completion in October 2019{{Cite press release|url=https://www.ktr.mlit.go.jp/ktr_content/content/000756360.pdf|title=八ッ場ダム試験湛>水を開始しました。| trans-title = Yamba Dam test flooding begins. | accessdate=2019-10-14 | archive-url=https://web.archive.org/web/20220804111925/https://www.ktr.mlit.go.jp/ktr_content/content/000756360.pdf | archive-date=2022-08-04 | publisher=国土交通省関東地方整備局|format=PDF|website=今日のやんば|author=八ッ場ダム工事事務所|lang=ja}} and the official opening on 1 April 2020.

History

Planning for the dam began in 1952, 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.

Test flooding of the reservoir began on 1 October 2019.

Yamba Power Plant, an 11,700 kW hydroelectric station attached to the dam, began operation on 1 April 2021.{{Cite web|title=八ッ場発電所が完成しました|publisher=群馬県|date= 2021-12-01|url=https://www.pref.gunma.jp/06/q1300018.html|accessdate=2022-01-20|archiveurl=https://warp.ndl.go.jp/info:ndljp/pid/11987444/www.pref.gunma.jp/06/q1300018.html|archivedate=2022-01-09|lang=ja|trans-title=Yamba Power Plant has been completed}}{{Cite web|title=クリーンエネルギーである水力発電の拡大に貢献群馬県企業局・八ッ場発電所の水力発電設備が竣工しました|publisher=明電舎|date=2021-07-07|url=https://www.meidensha.co.jp/news/news_03/news_03_01/1237010_2469.html|accessdate=2021-08-26|archiveurl=https://web.archive.org/web/20210707082012/https://www.meidensha.co.jp/news/news_03/news_03_01/1237010_2469.html|archivedate=2021-07-07|lang=ja}}

References

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

Category:Dams in Gunma Prefecture