Official

　This time, it was implemented on September 20 9/21 9/24 9/25 9/27 9/28 10/1 10/5.

①Kanda River Course: Learn about disaster prevention measures, 2 Onagi River Course: Learn about changes in logistics-

③Four courses: learn about the history of Tokyo Bay Course Development, 4 Sumida River Course, and 4 Night Scenery.

　I applied for the Onagi River course of 2.

The departure place is "Koto Old Nakagawa Watercolor Park Pier" near the Nakagawa Funabansho Museum, where amphibious buses arrive and depart.

By the way, according to the materials we received this time,

　The information point is an infrastructure that can only be experienced by boat.　I would like to talk about the role and structure of the Ogibashi Lock Gate, also known as the Mini Panama Canal in central Tokyo.

What is Komon?

　"The lock is a facility for" boats "to pass between water surfaces with different water levels. It is also called the "water elevator."

In the explanation of the Ogibashi Lock Gate,

　Year of completion: 1976 (Showa 51), lock width: 11m, Mr. Hinokuchi, Director: １１０ｍ

The Ogibashi Lock Gate is located almost in the center of the Onagi River, which runs east and west through the Koto Delta area, and can be said to be a "mini panama Canal" that allows ships to pass through rivers with different water levels.　The mechanism is to pass the ship by putting a ship into a waterway (lock room) sandwiched between two sluice gates and artificially raising the water level. During the season when it is easy to get close to the waterside, such as in summer, many ships such as pleasure boats come and go. (Source: Tokyo Metropolitan Construction Bureau website)

Well, it's a departure!

　When you leave with excitement, you will pass under the first bridge.　It's "Bansho Bridge".

During the Edo period, there was a "ship guard" here, which cracked down on inspection of boat traffic and cargo.

The Onagi River was a very important route because it was excavated to transport salt made in Gyotoku to Nihonbashi.

It was also called the "Salt Road".

　On the way, I passed the Shionomichi Bridge, Maruhachi Bridge, Sunashima Bridge, Shinkai Bridge, Onagi River Bridge, and Clover Bridge. .

The materials distributed to the participants 2 Onagi River course to learn about the transition of logistics are very useful.

I would like to use it in the future.

　It's Komatsu Bridge.　You can see the Ogibashi lock in front of you.

Regarding the mechanism of the Ogibashi Lock Gate, I would like to see the following:

The Tokyo Metropolitan Bureau of Construction website is kind and has a detailed explanation.

　Once the water level was the same as the gate that was injected and entered, the water level of the pool (lockroom) was the same, so after draining, the sluice gate was opened and moved forward.

Pass the lock safely and proceed along the Onagi River toward the Sumida River.　

Passing through the Shin-Onagi River sluice gate and Mannen Bridge in front, it is finally the Sumida River.

　Well, here's a sightseeing trip in Chuo-ku.

Kiyosu Bridge in a distant view.　It is said that the name was derived from the name of Kiyosumi-cho, Fukagawa-ku at that time and Nakasucho in Nihonbashi-ku.

　It was built along with Eitai Bridge as an earthquake reconstruction project.

Kachidokibashi, Eitai Bridge, and Kiyosu Bridge are registered as important cultural properties as Mitsuhashi over the Sumida River.

　Its history is old, and a wooden bridge was built in 1698 (1698) and was called "Toyomi Bridge" or "Otome Bridge".

In 1903 (1903), it was replaced by a wooden bridge to an iron bridge, but collapsed in the Great Kanto Earthquake.　Later, a bridge was planned as one of the earthquake reconstruction bridges, and was completed in 1927 (1927).　(Omitted) It adopts an unusual design that looks like a ladder is rolled down. (Hereinafter referred to as “Submission”)

　According to the "Chuo-ku Monoshiri Encyclopedia" that can be seen on foot.

The current bridge is a two-piece stone arch bridge, which was completed in 1911. The decoration was architect Yorinaka Tsumaki, who was in charge of (omitted).

It was designated as a national important cultural property in 1999.　In 2011 (2011), an event commemorating the 100th anniversary of the Nihonbashi Bridge was held in the Nihonbashi area.　Above

　I thought it was a long time ago, but

　The year before this commemorative event, the Nihonbashi Tourist Information Center was opened in 2010.

Danjuro Ichikawa and Sakata Tojuro board the dock of the current waterfall square and came to be called the "Sou Juro Riverside". 

 I have a very nostalgic memory. 

　The EDO ART EXPO will be held for the 17th time this year and will be held until October 8.

Sponsored by NPO Tokyo Chuo Net, sponsored by Tokyo, Chuo-ku, Chiyoda-ku, Minato-ku, and Sumida-ku, spanning four wards. This year's theme is "Spinning Edo"。　Please refer to the following URL.

This page introduces the co-sponsored website of Construction Technology Research Institute Co., Ltd. for reference.