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  1. timwoodpe

    Outlet Control with Flap/floodgate

    I am trying to find a good reference on how to deal with a culvert with Outlet control (at 100 year flood stage) that includes a flood gate (flap valve). I have the standard equations and could add in the head loss from the gate (manufacturer information relating with a Q - hl relationship)...
  2. timwoodpe

    Speed Change Lanes Use of exhibit 10-71

    I'm trying to decipher the use of Exhibit 10-71 in the AASHTO Greenbook (2001). Perhaps someone could enlighten me as to the "Ratio of length on grade to length of level for design speed of turning curve" in the table. Length on grade is straight forward but the denominator component of the...
  3. timwoodpe

    Storm Drain Inlet Blow-by

    Does anyone know of a good source (book or software) that can calculate the volume of water which "blows by" the storm drain inlet? I am interested in varying upstream gutter geometry and inlet opening geometry to optimize (minimize) that volume of water.

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