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Spillway Approach Embankement and Rip Rap Design

Spillway Approach Embankement and Rip Rap Design

Spillway Approach Embankement and Rip Rap Design

(OP)
I am searching for information on how to design an upstream approach embankment for a spillway. Items I am trying to design are

Height and Length of Embankement from the center line of dam/spillway (Site is a local lake).
Selection/thickness of Rip Rap material.  

Help will be highly appreciated.  


Thanks

RE: Spillway Approach Embankement and Rip Rap Design

emergency spillway?

height should be at the lake elevation during IDF
length should be to the point where the velocity in the approach channel is low
riprap design is the same as for any other channel. USBR and USACE have methods

RE: Spillway Approach Embankement and Rip Rap Design

(OP)
IDF= Intended Design Flood?

Do you know of the example that I can follow.  

RE: Spillway Approach Embankement and Rip Rap Design

Inflow Design Flood which may equal the PMF or 1/2 PMF etc.

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