[Tagging] Emergency=levee_breach_materials

John Willis johnw at mac.com
Fri Sep 21 09:31:31 UTC 2018


> On Sep 21, 2018, at 4:09 PM, Anton Klim <tohaklim at gmail.com> wrote:
> 
> Do these have anything to identify them, like a ref


I cannot find an official name or ref - but I can see their purpose. 

The next time I am on a cycling survey, I will take a picture of any small plaques they usually put somewhere on a man_made construction. 

I haven’t been able to find any sign onsite or web site explaining them - they are for someone with access to big (military) helicopters, so there is little-to-no public facing information at the sites themselves - but somewhere someone has a PDF with all the locations marked and ref'ed. 

I imagine it is not important to map them, but since I know what they are, I’d like to do it. 

All the signs tell people not to dump garbage, and one that says that the public parking lot is an emergency=assembly_point, but that is not present at the others - most are just stacks and stacks of blocks fenced in, waiting for a helicopter year after year. Some of the areas are very small - 100m2 - but the contents are just breakwater blocks surrounded by a fence, and they are stored adjacent to the levee - so there is only one purpose they could serve. you usually only see these kind of blocks near the ocean, protecting coastlines and and stacked into breakwaters.  

all of the permanent levee protection is poured concrete and boulders, so they are not normal building materials. 

I have found 15-20 caches of these blocks along the river in my area. Some are really old. The more I look, the more I find. I imagine there are several hundred Just around Tokyo. 

there are very few things that can stop a levee breach:

https://www.npr.org/sections/thetwo-way/2015/09/10/439106520/japanese-river-levee-fails-flooding-spurs-evacuation-order-for-130-000

Levee_breach_materials is a mouthful, but I cannot think of a shorter way to make the tag descriptive enough to avoid mistagging. 

Javbw




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