Date of the interview: 12/30 (Sun.) - 31 (Sat.), 2012
This is because the Hatakawaki Dam is located beside the main body, the Hatakawaki Dam, but it is a so-called saddle dam. At the time of construction, it was also called the "impervious retaining wall construction.
The Sanin Main Line runs south of the reservoir, and if the reservoir were flooded as it is, the fill of the Sanin Main Line, which is not durable against water pressure, would be soaked, so the purpose is to stop the water before the railroad line.
Note that no rivers flow into the Hatakawaki Dam, so the upstream, downstream, andright bank (shore)The term "left bank" is not correct, but is used for the sake of convenience in this article.
Day 1
As with the main body of the Hatakawa Dam, the tour was divided into two days.
View of the levee downstream from the right bank
It is a short distance from the main body of the Hatakawa Dam, and although it is not in walking distance, we came here by car because it was raining.
View of the top edge from the right bank
There is a large puddle at the top end.... At this time, it was still under construction, but the top edge is currently shared as a town road.
View of the embankment on the lake side from the right bank
It is a watertight wall, so there is no flood discharge of any kind.
View downstream from the top
The slope in the back is an embankment of the Sanin Main Line. I wrote that "there is no river running through it," but then, that thing you see below is...
A stream that has passed under the embankment of the Sanin Main Line
There is a stream right below the Sanin Main Line, but instead of having it join the dam lake from the Wakaki Dam, a tunnel was deliberately dug to bypass it downstream of the Hatakawa Dam.
This location certainly would not allow the line to merge with the dam lake, and if it were to merge with the dam lake, it would be necessary to build a bridge over the San'in Main Line, but it is easy to imagine that this would be a very large construction project, so they probably thought it would be more reasonable and cost effective to divert the line through a tunnel.
Incidentally, the photo below is taken directly below the Hata River Dam, and the structure on the lower right is the exit of the bypass tunnel.
View of the dam lake from the top
The rain does not seem to have stopped yet.
View of the levee downstream from the left bank
It is a small dam in terms of size, but it appears to be quite a robust structure. Is it because it protects the railroad?
View of the embankment on the lake side from the left bank
The main body of the Hatakawa Dam is at the far right.
2nd day
View of the top edge from the right bank
The next day, we came back again. The rain has stopped and the sun is shining, but the puddles on the top edge are still there.
View of the embankment on the lake side from the right bank
It is in the state of full water. It is receiving water well.
Looking downstream from the right bank
It is a strange sight to see again and again.
View of the levee downstream from the right bank
The downstream face of the levee faces south, so it is good to have almost direct light during the day.
View of the dam lake from the top
The left hand side is the main body of the Hatakawa Dam (downstream) and the right hand side is the upstream direction. This view will most likely never be seen again.
Although it is a subsidiary dam of the main Hata River Dam, the Hata River Waki Dam plays an important role in protecting the Sanin Main Line. Be sure to visit this dam in conjunction with a tour of the Hata River Dam.
Hatakawawaki Dam Specifications
Location | Shimoyama, Kyotanba-cho, Funai-gun, Kyoto |
River Name | Yura River system Hata River |
Objective | F (flood control, agricultural disaster prevention) N (unspecified water, water for river maintenance) W(Water for water supply) |
Model | G(gravity-fed concrete dam) |
Bank height | 21.8m |
Bank length | 105m |
Dam volume | 16,000m3 |
Watershed Area | 21.2 km2 |
Reservoir area | 20 ha |
Total storage capacity | 1,960,000m3 |
Effective water storage capacity | 1,530,000m3 |
Dam operator | Kyoto (metropolitan area) |
Main body constructor | Fujita Corporation, Kosei Corporation, Terao Corporation |
Year of launch | 1992 |
Year Completed | 2012 |
Name of Dam Lake | Shimoyama Four Seasons Lake |
Other facilities/observations
There is no parking lot at the Hatakawawaki Dam, but it is located on the main body side of the Hatakawaki Dam. Others are similar to the Hata River Dam.
Parking lot | ○ |
Toilet | ○? |
Park | × |
PR Exhibition Hall | × |
Fishing | ○○ (excluding prohibited areas) |
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