is a
dam
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...
in
Naganohara,
Agatsuma District
is a rural district located in Gunma Prefecture, Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends fr ...
,
Gunma Prefecture
is a landlocked Prefectures of Japan, prefecture of Japan located in the Kantō region of Honshu. Gunma Prefecture has a population of 1,937,626 (1 October 2019) and has a geographic area of . Gunma Prefecture borders Niigata Prefecture and Fuk ...
,
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
. Construction began in 1967, with effective completion in October 2019
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
The is a local rail line in Gunma, Japan, and is part of the East Japan Railway Company (JR East) network. Approximately following the Agatsuma River, it is 55.6 km between and stations.
Operations
Although the official start of the 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.
References
This article incorporates material from the corresponding article in the Japanese Wikipedia.
Dams in Gunma Prefecture
{{Kantō-dam-stub