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Thread: Impoundment Water Inlet

  1. #1
    Join Date
    Dec 2012
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    Default Impoundment Water Inlet

    Working through details on a small waterfowl impoundment and not sure about best route on handling the inlet water control. Adjacent to the impound we have a small stream that is diverted underneath a nearby road with a 15" RCP pipe.

    Basically, we can intercept the water at this rcp pipe and fill the pond when it is time, but want to keep it flowing as is when water is not required for the pond.

    Any good ideas on how to set up the inlet structure? First thought is to install a box at the existing pipe, install small section of pipe out of the box to keep current flow. Install second section of pipe out of the side of the box to fill the pond. Would it be best to control flow at the ends of the two pipes or at the junction box assuming this is the way to go?

    I don't think we want to kill all of the water flowing through the current route because we may end up causing issues upstream. Mainly want to divert some/most of the water into the pond when needed and keep it flowing as is most of the time.

  2. #2
    Join Date
    May 2007
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    I'm no expert, and don't know the laws, but you may not be able to do what you want because you'll be changing levels downstream if you divert/rob what's flowing. Seems like I've read or heard that before. I'm sure someone in the know will chime in.

  3. #3
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    Dec 2012
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    Theoretically no change in flow downstream would occur, but definitely understand your point.

    Just trying to figure out the best mouse trap for changing the path of the water back and forth.

  4. #4
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    Jun 2002
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    If it's a constant flowing stream just add a water wheel to pick water up and dump in pipe to pond and a discharge point out of pond back into stream.
    “You must teach your children that the ground beneath their feet is the ashes of your grandfathers. So that they will respect the land, tell your children that the earth is rich with the lives of our kin. Teach your children what we have taught our children, that the earth is our mother. Whatever befalls the earth befalls the sons of the earth. If men spit upon the ground, they spit upon themselves.”

    ~Chief Seattle ~

  5. #5
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    Unless you’re in the mountains, a stream isn’t something that can be managed through a 15” pipe. Sounds more like a ditch full of rain water. If it’s rain (storm) water, just use it.

    As to the diversion, unless you’re set on using RCP and installing a precast box, you could use large diameter PVC pipe, a couple of 45 degree bend fittings, and a valve.

  6. #6
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    Dec 2012
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    Gotcha. Was trying to stay away from using a valve for maintenance purposes, but that may be the most practical way to go. All good, thanks.

  7. #7
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    15" RCP pipe, under a road, may be a City, County or a SCDOT storm structure and you would need a construction permit to do anything with pipe, just a heads up.
    “You must teach your children that the ground beneath their feet is the ashes of your grandfathers. So that they will respect the land, tell your children that the earth is rich with the lives of our kin. Teach your children what we have taught our children, that the earth is our mother. Whatever befalls the earth befalls the sons of the earth. If men spit upon the ground, they spit upon themselves.”

    ~Chief Seattle ~

  8. #8
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    Dec 2012
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    We put in the 15" rcp under a dirt road on the property. There are no permitting issues with this project. Thanks.

  9. #9
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    Quote Originally Posted by Chasbeau1 View Post
    Gotcha. Was trying to stay away from using a valve for maintenance purposes, but that may be the most practical way to go. All good, thanks.
    Forget the valve. Just use a plug, or even better, install a sewer clean out on the upstream end.

  10. #10
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    Mar 2002
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    Florence
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    Add a foot of large granite rock across the bottom of the downstream ditch. Add 57 rock on top and let it settle into the large rock. This creates a check dam that will allow a portion of water to flow through the pipe and a portion to flow through the ditch. If heavy rain comes it will overflow the rock.
    Either write things worth reading, or do things worth writing.

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