New pond design idea/feedback/suggestions

RJM

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Hi all, new to the forum!

Having had small ponds previously, and having recently purchasing a new property, I am looking to finally get the wheels in motion building my dream pond.

I have an area in the garden (pictured) that was built as a raised planter for a fig and plum tree (now felled). I was wondering what your collective thoughts were on excavating down roughly a meter from the bottom of these walls, and using them as the basis for my pond build.

My thoughts were to dig a trench to match the depth of the existing wall footings at point A on the picture, cast a further foundation in this trench, and build a new wall up to the height of the other three. I then plan to back fill the rear portion (point B) and slab it as a raised patio/fish viewpoint.

Once the new wall is built, I would then excavate down to my desired depth in the front portion of the raised area (point C) and use that as the basis for my pond. (Point D will also be bricked up as it was an access step for the previous owner)

Would anyone see any issues with doing so? (I don’t want to have 4 walls collapse in on me). I could step the dig 200-300mm all around in order to give the walls a little more support during the build (and provide a shelf all around for plants etc) but would rather have the extra water volume to be honest. The ground beneath the topsoil becomes clay at the bottom of the wall.

I am planning to use a PE liner, and install a bottom drain (if possible), and home any filtration in the gap between the wall and the garage (point E) – although I am not sure if there is enough space here so may have to rethink that.

I am really just looking for any inspiration (and even constructive criticism) regarding the idea. As I say, I have only every previously had small ponds, with basic filtration, so am learning as I go.

I would appreciate any input, however condemning it may be.
 

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j.w

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@RJM
I'm not sure on how the best way is to go w/this project but I'm sure someone on here can help.
I have epdm liner and it lasts forever!
PE liners, or polyethylene liners, are generally less durable and more prone to punctures compared to other options like EPDM rubber or reinforced polyethylene (RPE) liners. RPE liners, for example, offer greater strength, puncture resistance, and can last longer, making them a better choice for many pond projects.
 

sissy

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welcome and have you looked on youtube also to see if anyone has done a pond like this . My pond is half underground and half above ground with concrete blocks . I did not cement them together . I just filled them with our clay soil nd packed the clay in the openings . ' After I rebuilt it I saw there was still alot of liner left so I added another layer of concrete blocks and then thicker flat patio block ontop of that , Then saw I still had liner left so added another layer of 4 inch thick patio blocks . None were glued or cemented together and so far so good . It has been over 10 years since i redid it . I keep my fingers crossed
 

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