[Tagging] Storm water control works?

johnw johnw at mac.com
Sun Jul 19 03:42:42 UTC 2015


What I was talking about


> On Jul 19, 2015, at 10:03 AM, John Willis <johnw at mac.com> wrote:
> 
> operated valve at the top of the levee to close it,

Most of the ones I find are on a little pier like thing. I guess the smaller ones were for dam water level adjustment on small dams. 

>  large "pier" that sticks out into the dry riverbed,

https://www.google.com/maps/@36.3854267,139.3443196,52m/data=!3m1!1e3 <https://www.google.com/maps/@36.3854267,139.3443196,52m/data=!3m1!1e3>
https://www.google.com/maps/@36.374736,139.369481,3a,75y,178.75h,85.01t/data=!3m6!1e1!3m4!1sfkNRMnj47r5GbqipdNQMQw!2e0!7i13312!8i6656 <https://www.google.com/maps/@36.374736,139.369481,3a,75y,178.75h,85.01t/data=!3m6!1e1!3m4!1sfkNRMnj47r5GbqipdNQMQw!2e0!7i13312!8i6656>

https://www.google.com/maps/@36.424005,139.351549,3a,16y,14.18h,89.47t/data=!3m7!1e1!3m5!1sp893AB1Dzl3lPjins-zw7Q!2e0!6s%2F%2Fgeo1.ggpht.com%2Fcbk%3Fpanoid%3Dp893AB1Dzl3lPjins-zw7Q%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D100%26h%3D80%26yaw%3D86.119034%26pitch%3D0!7i13312!8i6656 <https://www.google.com/maps/@36.424005,139.351549,3a,16y,14.18h,89.47t/data=!3m7!1e1!3m5!1sp893AB1Dzl3lPjins-zw7Q!2e0!6s//geo1.ggpht.com/cbk?panoid=p893AB1Dzl3lPjins-zw7Q&output=thumbnail&cb_client=maps_sv.tactile.gps&thumb=2&w=100&h=80&yaw=86.119034&pitch=0!7i13312!8i6656> 

>  
> 
> This is beyond the massive tsunami gates that span whole rivers in Japan - 15m tall gates that close to block a tsunami/typhoon surge at the bay outlet. 

https://www.google.com/maps/@39.5853076,141.9463357,399m/data=!3m1!1e3 <https://www.google.com/maps/@39.5853076,141.9463357,399m/data=!3m1!1e3> 

> 
> Several of them were washed away to their foundations by the last tsunami. 

https://www.google.com/maps/@38.715219,141.522999,3a,16.1y,310.36h,88.59t/data=!3m7!1e1!3m5!1sq50Y6fM0V2SPuG56aqj7gA!2e0!3e5!7i13312!8i6656!6m1!1e1 <https://www.google.com/maps/@38.715219,141.522999,3a,16.1y,310.36h,88.59t/data=!3m7!1e1!3m5!1sq50Y6fM0V2SPuG56aqj7gA!2e0!3e5!7i13312!8i6656!6m1!1e1>

Damaged one

Javbw
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