Dam in Aichi Prefecture

1241-Maeyama Dam

3.0
1241-Maeyama Dam Dam in Aichi Prefecture
This article can be read in about 4 minutes to read.

Date of interview: Saturday, February 8, 2014

On this day, a group of good friends who are dam enthusiasts decided to visit "Kanefuku Mentai Park" in Tokoname, and we stopped by Maeyama Dam on the way. We stopped by the Maeyama Dam. Maeyama Dam is a regulating reservoir for Aichi irrigation water, which was originally inherited from Aichi Prefecture, which was engaged in a prefectural irrigation and drainage project, and is now managed by the Japan Water Agency. The embankment is an earth dam.

View of the downstream face of the dike

The day before this day, there was heavy snowfall, and although fellow enthusiasts were originally scheduled to come from Kyoto, they were unable to come because they had normal tires. As you can see, Maeyama Dam was also snowed in.

View of the downstream face of the dike
View of the downstream face of the dike

Mystery equipment

Is it a discharge valve room for river maintenance?

Mystery equipment
Mystery equipment

conduit

We are looking at the conduit from in front of the mysterious facility. The embankment height is not so high (18.4m), so it is a gentle conduit.

Parking lot near the left bank and top edge

Maeyama Dam has two parking lots on the left bank and one on the right bank, so it can accommodate a large number of dam enthusiasts (lol).

The mottoes in the foreground were made by local elementary school students, and many of them were placed along the surrounding roads. Local children (or rather, children in Aichi Prefecture) are taught the importance of water in the Chita Peninsula and the greatness of the Aichi Irrigation Project at school, so I am sure that they fully understand the importance of water.

Incidentally, the building in the back is the downstream management office of the Aichi Waterworks.

Parking lot near the left bank and top edge
left bank (of a river)Parking lot near the skyline

Looking upstream from the left bank parking lot

From the parking lot, it is a short walk to the dike. However, the road shown in the photo below is inaccessible, so you need to walk on the city road in front of it. Moreover, there is no sidewalk, so you need to be a little careful.

Looking upstream from the left bank parking lot
Looking upstream from the left bank parking lot

Flood discharge

The flood discharge is a side channel type, as is typical of earth dams and rock-fill dams. There is one through gate on the reservoir side, but since the gate is located lower than the top of the overflow weir, it appears to play the role of a permanent flood discharge. The hole on the right side of the overflow weir is probably the outlet from the gate. This is an interesting structure that is not often seen in other earth dams, but it is difficult to find much information about it.

Looking upstream from the left bank

The slope is protected by concrete framing and filling.

Looking upstream from the left bank
Looking upstream from the left bank

Local Signboard

This is a signboard explaining the Maeyama Dam. The name "Maeyama Pond" is used because it is more easily understood by the local people. As you can see from the diagram, the Aichi Irrigation main channel flows upstream of the reservoir, and water taken from the intake tower at Maeyama Dam is supplied to the main channel through a conduit.

Local Signboard
Local Signboard

View of the top edge from the left bank

The top edge is accessible only on foot.

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

Looking downstream from the left bank

As expected from the Japan Water Agency management.earth damIt is a clean downstream surface. The water from the Maeyama Dam flows as the Maeyama River, which merges with the Yada River a few hundred meters downstream from the sea. The Yada River reminds us of a tributary of the Shonai River that flows through Nagoya City, but it is a different river with the same name.

Looking downstream from the left bank
Looking downstream from the left bank

Looking downstream from the right bank

For some reason, there is no fence on the downstream side, but thanks to this, you can lean out a bit to watch.

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

Road to the observation and exchange plaza

On the right bank is a small hill named "Observation Plaza. Upstream from the hill, there is a plaza called Koryu Hiroba (Exchange Plaza). The view from the observation deck is not so good, so we did not go that far on this day.

Road to the observation and exchange plaza
Road to the observation and exchange plaza

Looking upstream from the right bank

The right bank side of the embankment is built in a curved shape. The white building seen below the steel tower is an intake tower, from which water is taken to supply the Aichi water supply upstream.

Looking upstream from the right bank
Looking upstream from the right bank

View of the reservoir from the right bank

The reservoir is not very large, but waterfowl were resting their wings. Even though it is not very large, Maeyama Dam is said to be the largest agricultural reservoir on the Chita Peninsula, with a beneficiary area of 1,103 ha, an effective storage capacity of 972,000 m3, and a crest height of 18.4 m, ranking first in all rankings of agricultural reservoirs on the Chita Peninsula. (Reference: Aichi Prefecture Chita Agriculture, Forestry and Fisheries Office reservoir ranking)

By the way, isn't the Saburi Dam (Saburi Pond) No. 1? However, the Saburi Dam is an industrial water supply facility.

View of the reservoir from the right bank
View of the reservoir from the right bank

The Maeyama Dam is located downstream of the Aichi Irrigation Canal and is a key site for agricultural water supply in the Chita Peninsula.

Maeyama Dam Specifications

LocationKanayama-cho, Tokoname-shi, Aichi
River NameYada River system Maeyama River
ObjectiveA (irrigation water)
ModelE (earth dam)
Bank height18.4m
Bank length244m
Dam volume136,000 m3
Watershed Area2.1 km2
Reservoir area19ha
Total storage capacity985,000 m3
Effective water storage capacity972,000 m3
Dam operatorAichi Prefecture → Japan Water Agency
Main body constructorShimizu Corporation
Year of launch1977
Year Completed1990
Name of Dam LakeMaeyama Pond

Other facilities/observations

There are two parking lots on the left bank and one on the right bank, and restrooms are located in the park on both the left and right banks.

Parking lot
Toilet
Park
PR Exhibition Hall×
Fishing×

Map around Maeyama Dam

Weather around Maeyama Dam

Accommodations that may be close to Maeyama Dam

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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