Date of the interview: Sunday, 02/24/2013
The day after the memorable 1st Gathering with Dam Lovers in Agigawa Dam, we were all invited to get an instruction manual for the new Toyone Dam card. We were given an opportunity to visit the inside of the dam. We were given an opportunity to visit the inside of the Shin-Toyone Dam. We were given a chance to see the inside of the Shin-Toyone Dam.
Please promote the new Toyone Dam!" I was originally going to write an article about it right away, but I realized that 9 years have passed... (It may be a little hard to remember... sorry 💦) (It may be a little hard to remember...sorry 💦)
View of the reservoir and the upstream face of the embankment from the left bank
Well, we all came to Shin-Toyone Dam after eating Shin-Toyone Dam Curry together at Y~rando Pal and Yone. It was cold and windy in February, but the blue sky made us feel good.
View of the top edge from the left bank
On this day, there was residual snow in shaded areas.
View of the dike from the roof of the control center
After a briefing in the control center, we went to the roof. The levee is illuminated by the forward light. Participants' shadows can be seen in the shadow of the management office.
Antenna on the roof of the control center
Is it a microwave antenna?
Siren on the roof of the control center
Every time I see a siren up close, I get a little anxious...what if it blows at this moment?
Looking downstream from the top of the levee from the left bank
Move from the roof of the control center to the top edge. An ultra-wide angle lens is effective in capturing the asymmetrical parabolic domed arch.
View of Gate Pier from the top
The Shin-Toyone Dam is equipped with two roller gates for emergency flood discharge and one conduit gate for normal flood discharge.
View of the top of the roller gate from the top edge
The roller gate measures 13.80 m wide by 8.657 m high, with a door weight of 57 t per gate.
Coaster gate side
Between the two roller gates is a conduit gate on the downstream side and a coaster gate as a spare gate on the upstream side. The coaster gate is 5.7 m wide by 6.419 m high and has a door weight of 74 tons. Incidentally, the conduit gate is 3.80m wide by 4.19m high.
Boathouse and boats on the right bank
This is the boatyard and stored boats on the right bank. There should be a float in front of the boat, but there is not.
Broken float
I forget the cause, but it was said that the float had broken and was being pulled back to the right bank.
View of the top edge from the right bank
draw a curveTop (Crest)It's cold but feels good with blue skies. It's cold, but it feels good with blue skies. (But later it turned out that I was infected with norovirus, and my stomach actually ached all the time...)
Go down the stairs on the right bank.
The group finally steps into the forbidden land. The sunlight hitting the embankment is too bright, causing a halation.
Looking downstream from the middle of the stairs on the right bank
The levee is too dazzling. Still, we look at the dike as if we were licking it.
Looking downstream from the right bank catwalk
The weather was great to be able to look up at the new Toyone Dam from such an angle.
Levee stairs
This staircase coming down from the top edge is quite a knee smiler.
Downstream view of the embankment from the side of the right bank reduction works
This angle and arch shape are wonderfully beautiful. I think it is also beautiful because of its asymmetry.
View of the force-reducing structure (water slap) from the right bank.
The concrete seems to be one step thicker, perhaps because of the direct fall of the discharged water.
Move a little downstream to see the downstream face of the dike
Here is a sight that will take your breath away.
The Shin Toyone Dam was designed exclusively for power generation when it was planned, but in 1968 and 1969, soon after construction began, the Urakawa River in Sakuma-cho, Shizuoka Prefecture (now Urakawa, Tenryu-ku, Hamamatsu City) downstream suffered flood damage in two consecutive years.
The damage caused by the dam led to participation in flood control, and after some twists and turns, the dam was raised 4 meters from the original plan and re-launched as a multi-purpose dam.
If the purpose had been only to generate electricity, the design of this dike with two crests + one conduit would have been very different.
To the Audit Corridor
After enjoying the downstream face of the levee for a while, we will enter the inside of the levee.
Stairway in the embankment
Each dam has its own unique audit corridor. The new Toyone Dam has been constructed for some years, but it has a relatively clean audit corridor. The staircase was designed with a high kick height, which was common in those days.
Equipment for measuring leaks
This equipment is used to measure the amount of water leaking from the joints between the bedrock and the embankment below the dam. It consists of water meters and triangular weirs.
Looking downstream from the catwalk
The abatement works of the new Toyone Dam have an angled slope, which narrows as it goes downstream. The sub-dam beyond it looks like a small arch dam.
Downstream view of the levee from the left bank around the inclined elevator
The time was past 4:30 pm. The levee is now completely in shadow. The levee from this angle is also amazing. I could watch it for a long time.
left bank (of a river) viewing platform
It is an observation deck utilizing the rooftop of the machine room of the inclined elevator. It is said to be a Yamabiko point, and dam biko will be returned to you (laugh).
Downstream view of the levee from the left bank observation platform
Thanks to you, we had a day of fun and memories.
(I had a stomach ache, though.)
There have been some fun events at the new Toyone Dam to drain the water between the conduit gate and the coaster gate, and we hope you will visit regardless of the events being held.
New Toyone Dam Specifications
Location | left bank (of a river)1 Tsukishiro, Aza Tsukishiro, Furumadate, Toyone-mura, Kitashitara-gun, Aichi Prefecture, Japan right bank (shore)1-1, Goyama 1, Furumadachi, Toyone-mura, Kitashitara-gun, Aichi, Japan |
River Name | Tenryu River System Oiri River and Furumadate River |
Objective | F (flood control, agricultural disaster prevention) P(Power generation) |
Model | A(arch dam) |
Bank height | 116.5m |
Bank length | 311m |
Dam volume | 374,800 m3 |
Watershed Area | 136.30 km2 |
Reservoir area | 156ha |
Total storage capacity | 53,500,000 m3 |
Effective water storage capacity | 40,400,000 m3 |
Dam operator | Ministry of Land, Infrastructure, Transport and Tourism Power Development Co. |
Main body constructor | Kumagai Gumi |
Year of launch | 1969. |
Year Completed | 1972 |
Name of Dam Lake | Midoriko (Green Lake) |
Other facilities/observations
Parking lot | ○ |
Toilet | ○ |
Park | ○ |
PR Exhibition Hall | × |
Fishing | ○(Excluding no-take zones, fishing fee required) |
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