Kawamata Power Station

…A multipurpose dam for flood control, water supply, and power generation, completed in 1965 by the Ministry of Construction as part of the Comprehensive River Development Project in the Setoai Gorge upstream of the Kinu River in Kuriyama Village, Shioya County, Tochigi Prefecture. It is a thin arch dam, 3m thick at the top and 12m thick at the bottom, with a height of 117m, a crest length of 131m, a volume of 170,000m3, a reservoir area of ​​2.5km2, a total storage capacity of 87 million m3, a usable storage capacity of 73 million m3, and a maximum output of 27,000kW at the attached Kawamata Power Station. By studying the flat arch shape with a small central angle, the dam was designed to direct the arch force perpendicular to the surface of the foundation, and it was the first in Japan to carry out construction work to increase the bearing capacity of the dam foundation bedrock, such as tightening the foundation bedrock with high-tensile steel bars, which contributed to the subsequent development of technology for constructing dams on difficult foundation bedrock. …

*Some of the terms mentioned in relation to the Kawamata Power Plant are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…栃木県塩谷郡栗山村，鬼怒川上流瀬戸合峡に，建設省が河川総合開発事業の一環として1965年に完成した洪水調節，用水，発電を目的とした多目的ダム。厚さが頂部で3m，底部で12mの薄いアーチダムで，高さ117m，堤頂長131m，堤体積17万m3，貯水池の湛水（たんすい）面積2.5km2，総貯水量8700万m3，有効貯水量7300万m3，付属の川俣発電所での最大出力は2万7000kW。弧の中心角の小さい扁平なアーチ形状を研究して，アーチの力を基礎の表面に垂直な方向に向けるように設計するとともに，基礎岩盤を高張力鋼棒で締めつけるなど，日本で初めてのダム基礎岩盤の支持力を増強するための工事を行って，その後のむずかしい基礎岩盤にダムを築造する技術の発展に寄与した。…

※「川俣発電所」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報