Dam in Aichi Prefecture

1229-Shin Toyone Dam

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1229-Shin Toyone Dam Dam in Aichi Prefecture
This article can be read in about 6 minutes to read.

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 reservoir and the upstream face of the embankment from the left bank
View of the reservoir and the upstream face of the embankment from the left bank

View of the top edge from the left bank

On this day, there was residual snow in shaded areas.

View of the top edge from the left bank
View of the top edge from the left bank

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.

View of the dike from the roof of the control center
View of the dike from the roof of the control center

Antenna on the roof of the control center

Is it a microwave antenna?

Antenna on the roof of the control center
Antenna on the roof of the control center

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?

Siren on the roof of the control center
Siren on the roof of the control center

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.

Looking downstream from the top of the levee from the left bank
Looking downstream from the top of the levee from the left bank

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 Gate Pier from the top
View of Gate Pier from the top

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.

View of the top of the roller gate from the top edge
View of the top of the roller gate from the top edge

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.

Coaster gate side
Coaster gate side

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.

Boathouse and boats on the right bank
Boathouse and boats on the right bank

Broken float

I forget the cause, but it was said that the float had broken and was being pulled back to the right bank.

Broken float
Broken float

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...)

View of the top edge from the right bank
View of the top edge from the right bank

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.

Go down the stairs on the right bank.
Go down the stairs on the right bank.

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 middle of the stairs on the right bank
Looking downstream from the middle of the stairs on the right bank

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.

Looking downstream from the right bank catwalk
Looking downstream from the right bank catwalk

Levee stairs

This staircase coming down from the top edge is quite a knee smiler.

Levee stairs
Levee stairs

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.

Downstream view of the embankment from the side of the right bank reduction works
Downstream view of the embankment from the side of the right bank reduction works

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.

View of the force-reducing structure (water slap) from the right bank.
From the right bankmomentum reducer(See (water tapping)

Move a little downstream to see the downstream face of the dike

Here is a sight that will take your breath away.

Move a little downstream to see the downstream face of the dike
Move a little downstream to see the downstream face of the dike

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.

To the Audit Corridor
To the Audit Corridor

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.

Stairway in the embankment
Stairway in the embankment

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.

Equipment for measuring leaks
Equipment for measuring leaks

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.

Looking downstream from the catwalk
Looking downstream from the catwalk

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.

Downstream view of the levee from the left bank around the inclined elevator
Downstream view of the levee from the left bank around the inclined elevator

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).

left bank (of a river) viewing platform
left bank (of a river) viewing platform

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.

Downstream view of the levee from the left bank observation platform
Downstream view of the levee from the left bank observation platform

New Toyone Dam Specifications

Locationleft 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 NameTenryu River System Oiri River and Furumadate River
ObjectiveF (flood control, agricultural disaster prevention)
P(Power generation)
ModelA(arch dam)
Bank height116.5m
Bank length311m
Dam volume374,800 m3
Watershed Area136.30 km2
Reservoir area156ha
Total storage capacity53,500,000 m3
Effective water storage capacity40,400,000 m3
Dam operatorMinistry of Land, Infrastructure, Transport and Tourism
Power Development Co.
Main body constructorKumagai Gumi
Year of launch1969.
Year Completed1972
Name of Dam LakeMidoriko (Green Lake)

Other facilities/observations

Parking lot
Toilet
Park
PR Exhibition Hall×
Fishing○(Excluding no-take zones, fishing fee required)

Map around Shin-Toyone Dam

Weather around Shin-Toyone Dam

Accommodations that may be close to Shin Toyone Dam

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This article was written by.
Shin Jinma

Dam enthusiast who loves Momosuke Fukuzawa / Dampedia and Dam News administrator / Certified Dammeister (01-018) by the Japan Dam Foundation / Started selling discharge caution goods.https://shop.dampedia.com

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