Miyagase Dam, Concrete gravity dam in Kanagawa, Japan
Miyagase Dam is a dam in Kanagawa Prefecture, Japan, blocking the Nakatsu River. The concrete wall rises 156 meters and the reservoir behind it holds up to 193 million cubic meters of water.
Construction began in 1971 and lasted until 2000, as 300 households had to be relocated. The government chose this method to provide drinking water for the growing population of the region.
The name Miyagase refers to the mountainous terrain and forests that surround the reservoir. Visitors come to fish and picnic along the shoreline paths, while school groups follow the water education trail around the lake.
The dam sits about 50 kilometers from Tokyo and is reachable by car or bus. A visitor center near the shore provides information about how it works, and there are viewpoints where you can see the wall.
The wall is the largest roller-compacted concrete structure of its kind in the country. The Aikawa power plant generates electricity using the water, producing around 24,000 kilowatts for local communities.
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