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#203208 - 02/08/10 11:09 PM Building a concrete dam/weir
Ed in Gettysburg Offline
Fingerling

Registered: 06/23/05
Posts: 2
Loc: Gettysburg, PA
Hello all! I am back after about 2 years, trying to get back to my small (slightly less than) 1/2 pond here in Gettysburg, PA. I want to install a concrete dam on the outlet of my pond where the earth has eroded away. The dam would not need to be any higher than 8 feet nor any wider than 8 feet. Currently I have a 10 inch dia overflow pipe that runs under the burm and out into the creek. This is too small to handle the flow when we get a lot of rain; consequently, erosion continues to take place. I want to put a pond drain into the concrete dam and also a larger overflow pipe to handle the excess water. Are there any plans or specs that would help me properly design and build the concrete dam. I have poked around on the forum but have not read anything that meets my need. Thank you.
_________________________
Ed Moe

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#203254 - 02/09/10 08:51 AM Re: Building a concrete dam/weir [Re: Ed in Gettysburg]
jeffhasapond Offline
Ambassador
Field Correspondent
Lunker

Registered: 07/28/06
Posts: 7613
Loc: Pond in No CA, Me in So CA
Hello Ed, thanks for joining in and posting! Hang on for some expert feedback.
_________________________
JHAP
~~~~~~~~~~

"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)

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#203296 - 02/09/10 11:24 AM Re: Building a concrete dam/weir [Re: jeffhasapond]
andedammen Offline
Lunker

Registered: 08/25/09
Posts: 414
Loc: Norway
_________________________
PAUL

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#203309 - 02/09/10 01:47 PM Re: Building a concrete dam/weir [Re: andedammen]
rockytopper Offline
Lunker

Registered: 01/20/05
Posts: 1239
Loc: texas
Ed post pic's of the pond and drainage issues, it will help us help you.
_________________________

The road goes on forever and the party nevers end...............................................

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#203311 - 02/09/10 02:00 PM Re: Building a concrete dam/weir [Re: andedammen]
dave in el dorado ca Offline
Ambassador
Lunker

Registered: 04/26/06
Posts: 3261
Loc: el dorado ca
i dont know how much help this is to you, but ours works good. it was formed in concrete w/ 20' rr bridge timbers on top. before renovation it had a bad undermine on the outflow/back side, and i covered the aging bridge timbers with rebarred concrete set in deep footings.

looks like this:

before renovation
back side



after renovation
back side



front side


may give you some ideas anyways.


Edited by dave in el dorado ca (02/09/10 02:01 PM)
_________________________
GSF are people too!


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#203465 - 02/10/10 10:17 AM Re: Building a concrete dam/weir [Re: dave in el dorado ca]
Ed in Gettysburg Offline
Fingerling

Registered: 06/23/05
Posts: 2
Loc: Gettysburg, PA
Gentlemen, Thanks for the great feedback and encouragement. We are currently under about 2 feet of snow and we have another foot or so coming down now, so it may be a while before I can take some photos to give you a better understanding of what I want to do. Thanks again.
_________________________
Ed Moe

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#203479 - 02/10/10 12:20 PM Re: Building a concrete dam/weir [Re: Ed in Gettysburg]
andedammen Offline
Lunker

Registered: 08/25/09
Posts: 414
Loc: Norway
This might be handy wilst planing/reading/discusing your project, helps me a lot to overcome obsticales or consume/understand plans drawings and explenations.
http://www.dec.ny.gov/docs/water_pdf/swdmglossary.pdf
_________________________
PAUL

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#203635 - 02/11/10 11:23 AM Re: Building a concrete dam/weir [Re: andedammen]
otto Offline
Lunker

Registered: 11/02/04
Posts: 1074
Loc: texas
Dave
Great pictures and great work. Spillways that wash out are a constant problem. It looks like you fixed yours for good.

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