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Re: Flood Control Structures

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Items for consideration:

1. Scour. You need to have information to determine the amount of scour you
might anticipate.

2. If this structure blocks a navigable body of water, you need to determine
what size craft need to get through your gate and design the gate
accordingly.

3. I recently did one here in Louisiana (still under construction) and we
had to notify all of the locals that we were about to block their access for
a while. A public notice was also posted in the paper, but we had to
personally contact them. Fortunately there were not many.

4. We did not use AASHTO, just SSBC. Aside from scour considerations, we
just designed it like a retaining wall. We did have to calculate the
vertical force it would take to lift the gate against the weight of the
water. This was nothing more than taking the gross lateral force and
multiplying it by the proper friction factor adding the weighrt of the gate
to it and multiplying the entire thing by a factor of safety.

Randy Russ
Russ Engineering Group, Inc.
Baton Rouge, La.

-----Original Message-----
From: Jonathan G. Sevilla, CE <seaint(--nospam--at)edsamail.com.ph>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Thursday, September 21, 2000 12:25 AM
Subject: Flood Control Structures


>Ladies/Gentlemen:
>
>We are about to do a flood control project here in our country and I would
like to ask for the following:
>
>1. Could you give us some good referece
books/website/publications/informations/etc. that we can use in relation to
the subject?
>
>2. We are using American codes here (aside form our local code) and UBC as
well. Is AASHTO applicable for such structures?
>
>3. Any special considerations for flood control structures (flood gates,
retaining walls, etc)such as loadings, etc. that we need to take note of?
>
>Any information you could extend to us will be highly appreciated. Thank
you in advance.
>
>
>J.G. Sevilla
>Structral Engineer
>Trans-Agalma Group
>Philippines
>
>
>
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