多摩川決壊の碑

《Inscription quotes》 Monument sentence The water level of the Tama River continued to rise from the late night of August 31, 1974 (1974) to the evening of September 1, due to a large amount of rainfall centered on the upstream Hikawa river, affected by typhoon No. 16. Due to this flood, around the noon of the day, a part of the river bank at the left bank of the Nigeryoyado Kawara dam was partially destroyed. After 10 pm, the main embankment broke and scouring of residential areas began. The detour flow continued unabated, damaging 260m of the main embankment and damaging 19 houses in the Inomata area of ​​Komae City from midnight to the afternoon of the third. This "Tama River flood" is a unique disaster that occurred in a residential area in the Tokyo metropolitan area over a long time of 3 days, and was reported to the whole country in real time by the news media, and attracted the attention of many people. The Ministry of Construction promptly proceeded with the restoration work around the main weir immediately after the disaster, completed the following year, and established the “Tama River Disaster Investigation Technical Committee” to quickly find out the cause. On the other hand, the disaster victims filed a lawsuit under the National Compensation Law, and it was also pointed out that the flaws in river management were pointed out again, and the verdict was finalized in 1992. In 1998, a new weir was completed for the purpose of safely flooding 40m downstream of the conventional weir and preserving and creating a rich waterside environment. This is to convey the fear of flood damage to future generations and to keep in mind the importance of flood control. March 27, 1999 Ministry of Construction Keihin Construction Office Komae City This monument to the Tamagawa collapse was temporarily removed by Typhoon No. 19 on October 10, 2019, but as of June 2020, the monument has been returned to its original location.

A short walk from Izumi Tamagawa Station on the Odakyu Line leads you to the Tama River. When you get off the embankment, the riverbed spreads out. This is the city of Komae. There is a monument to the Tama River collapse on the riverbed. In September 1974, a flood caused by Typhoon No. 16 broke the embankment of the Tama River and washed away 19 private houses. This monument is just around the corner, but now it doesn't look like it. In 1977, the TV drama "Kishibe Album" was broadcast. This drama is based on the Tamagawa collapse. At the opening, there was a video of the house being washed away by the flood. This monument describes the situation of damage at that time.

It is said that the "Tama River Collapse Monument" was removed and stored by the government before Typhoon No. 19 in 2019. There was a description in this blog. ➜ [Search] "Where is the monument to the collapse of the Tamagawa River, one cat a day?" I think it is assumed that the riverbed will overflow with water and become a rare muddy stream. In addition, Typhoon No. 19 passes through the area from the night of October 12, 2019 to the early morning of the following day. At the time of the collapse in 1974, I actually witnessed a lot of furniture flowing through the river. In addition, the dull sound of the Self-Defense Forces exploding the Shukugawara Dam, which was an obstacle to the water flow, was transmitted to my home several kilometers away. It was truly surprising that something like that would happen in the middle of the city, but Typhoon No. 19 in 2019 was even more astonishing as the rivers flooded in various places, including the Tama River. (❖ update: 2020-04-24 upload: 2019-11-05)

Large-scale levee breakout site. Currently, it will be Jijiu open space and will be to Sabae citizen's rest area.

As of October 20, 2019, it has been removed for some reason. Is it related to Typhoon No.19? There seems to be at least the end of February this year because there are people writing on the blog. [Addition] It seems that it was removed after Typhoon # 19. But why?

The surrounding vegetation and benches have been maintained to make it easier to see from the bank.

On September 1, 1974, typhoon No. 16 flooded and the embankment near Komae City broke. Fortunately, there were no deaths because the residents had criticized it in advance, but the flood damage point where many private houses were leaked is exactly here.