Location: Unohara, Kanayama-cho, Gifu Prefecture, Gero City, Gifu Prefecture
Official Web site:.http://www.water.go.jp/chubu/iwaya/
View of the levee from the bridge downstream
The Iwaya Dam is located just north of the Maze River Dam. It is located above the Mazegawa No. 2 Power Plant and the pumped storage power plant. Again, this is an early morning photo, so the reflection is poor....
View of the embankment from the left bank
As might be expected of one of the largest rock-fill dams in Japan, it is huge.
View of the gate from the left bank
There are two gates. The gates are relatively clean, perhaps freshly painted.
Looking downstream from the left bank
The power generation facility can be seen below. It seems that the power plant can also be visited, and that tourist buses go directly into the inside of the dike. The entrance is quite wide and high.
stone monument
The top end of the dam is accessible to vehicles. It is rare to see a large-scale rockfill dam that allows ordinary vehicles to pass through the top end.
View of the embankment from the right bank
Gate seen from the dam lake side
View of the embankment from the left bank
It was just the time of year for autumn foliage, and the fiery red colored leaves were impressive. Living in the Chubu area, "Asuke" comes to mind when I think of autumn foliage, but I also recommend the traffic jam-free Iwaya Dam.
Iwaya Dam Exhibition Hall
It was early in the morning, so naturally, it was not open....
View of the embankment from the left bank
selective intake tower
View of the levee from the left bank (further upstream)
I tried to process the image to get a beautiful red color, but it was a complete failure.... Since it was a failure at the shooting stage, there is no way to process it.... I would like to learn more about shooting techniques and image processing.
Iwaya Dam Specifications
| Objective | Flood control, agricultural disaster prevention, irrigation water, water supply, industrial water, power generation |
| Bank height | 127.5m |
| Bank length | 366.0m |
| levee length and width | 10.0m |
| Dam volume | 5,780,000m3 |
| Watershed Area | 1,734.9 km2 |
| Reservoir area | 424ha |
| Total storage capacity | 173,500,000m3 |
| Effective water storage capacity | 150,000,000m3 |
| Name of Dam Lake | Tosenkyo Jinshan Lake |
| River Name | Kiso River System Maze River |
| Year of launch | 1966 |
| Year Completed | 1976 |
Other facilities/observations
It is a dam worth visiting. It has been turned into a tourist attraction, perhaps because it is considered popular among the general public because of its size and scenic beauty.
| Parking lot | ○ |
| Toilet | ○ |
| Park | ○ |
| PR Exhibition Hall | ○ |
Accommodations that may be close to Iwaya Dam
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