Outdraft conditions?

  • buschman
    Pool 2
    Posts: 1762
    June 20, 2012 at 5:13 pm #1316141

    What does the corps mean by “outdraft conditions”. I have an idea but thats assuming? Sure someone here can explain it well. Thanks!!!

    carroll58
    Twin Cities, USA
    Posts: 2094
    June 20, 2012 at 5:36 pm #1077416

    Quote:

    What does the corps mean by “outdraft conditions”.


    COE L&D3 Info, Outdraft

    Just googled this:
    Mississippi River: Lock & Dam 3 Navigation Safety and Embankment Improvements, Minnesota and Wisconsin Location/Description

    Lock and Dam 3 is a navigation dam and lock on the Mississippi River approximately 6 miles upstream of Red Wing, Minnesota. Its position on a bend in the river makes downbound navigation difficult because of an . The outdraft current has resulted in many accidents, including 11 incidents since 1968 when tows collided with the gated part of the dam.

    The low and weak embankments on the Wisconsin side are a related problem. Navigation accidents can render the four roller gates inoperable, resulting in overtopping and erosion of the embankments. Three series of Wisconsin side embankments divide the 8-foot head at the dam into three steps and work together as part of Lock and Dam 3. Failure of the embankment system could result in an accidental drawdown of Pool 3 with significant economic and environmental consequences.

    Hunting4Walleyes
    MN
    Posts: 1552
    June 20, 2012 at 6:43 pm #1077440

    This link provides some good material on outdrafts regarding the locks. I’m not sure if that is what you were looking for but I thought I would throw it out there.

    Outdraft

    buschman
    Pool 2
    Posts: 1762
    June 21, 2012 at 7:06 pm #1077816

    Thanks Guys, I see it on the corps site and just like to know for sure what there talking about. Draw, Balance, and Outdraft…. that helps. I assume that a Draw is pretty much the same as an eddie. Outdraft must be the point where the current makes a push along the bank/lock and pushes the water back out to the gates. I would assume this creates some lift as well and would make lining up with a reverse rudder a difficult task?
    Running those bardges has to be quite the job in a high water scenario. Sorry for the odd question. A guy ends up with way to much time to think when catfishing…. Might have to get back out after walleyes soon. They help keep you mind from wandering into the gutter

    blakeb
    MN
    Posts: 36
    June 27, 2012 at 1:20 am #1078867

    my mind is way to far into the gutter

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