SF Bay Area Koi Club

Organization of Pond and Koi Keepers

Pond Rebuild -- The Foundation -- Part 3

11/25/2015 11:23 AM | Anonymous member (Administrator)

Continuing on through this project right now, there are lots of different moving parts.  Take a breathe and keep on, keepin' on, because soon we reach a monumental point.

This shows our points of the bottom drain and the skimmer line coming into the pump and filter area.  We will revisit this photo in the plumbing blog.  You may notice that the back boards of our yard extends into a double layer which will hold our electrical plugs and on/off switch.

That monumental day arrived.  The electricians have run an electrical line down our trenches.  We tied this pond wiring into its own switch in the panel  We can now proceed to filling in our ditches and laying out the plumbing.

The electricians are finishing up.  We can now get down to building and pouring lots and lots of cement.

Here we are accomplishing 2 things;  we get nice foundation that is 4" deep to hold our top ring of blocks and we get that 4" of height from the last blog where we did not want run off from the lawn to flow intot he pond, we wanted to raise the edge 4".

This photo is a milestone.  you can see that the skimmer block with the TPR lines up with the foundation layer.  The plumbing is connected and will be back filled with sand.

You can see that once I pour each section of the foundation and it dries, I can dry install the top ring of blocks.  By doing a section at a time you can use the row before to line up the following blocks and drive in your rebar in every other hole.

This is a last shot of dry fitting of the bog area.  We have completed the left side top ring from the double high block.

This is a dry fit using a large tarp we bought for the rain.  The tarp is 15' x 9' and our liner is a full sheet of 25' x 20'  we are right on the money in terms of staying within our liner.

The 2 biggest tools you can use in your build is a level and a line level.  Every section every inch and over and over, drag that line level and check to see you are within the bubble lines.

Here we have made it past our skimmer wall and am moving along the front.  You can also see that the electrical and skimmer trench has been filled in.  There are two points here.   The first one is below the orange level and the second, is just to the right of the grey cement.  We will save those points and make and shelf for shallow plants.  The point will also support a large rock that will be half exposed above the water.

I spray painted a ground zero block to which my line level could be grounded and everything else would now level off of this zero block.  Using cardboard cutouts of the bird baths I realize that the bird bath should be one brick back, so that the bird bath can look like it is supported by rocks instead of liner sticking up above the water line.

When building a pond you have to let the land you are working with speak to you and help you decide where things will go.  Our turn of the top row allowed us to retain just enough space for a couple bog plants.

This is Aurora and she is thrilled to see our vision becoming a reality.

Progress.  Just keep pouring cement.  Here you can see both shelves.

This is the connecting point, of the pond to the left, the bog to the right and my needing to keep a tunnel for the bottom drain plumbing.  So I made one here and poured cement and a cement foundation atop it it.  This will allow me to continue my foundation and top ring construction.

You can spot a hint of my tunnel and I was 2 bags short for the foundation, back to the store for a 7-8 more.

Here you can see ground zero block.  The 3 rebar were trimmed to the inside of blocks.  The bird bath has also been set in one, so the end product looks like it emerged from the rocks.

Long horizontal rebar pieces were bent with a rebar bender and tied to the vertical supports in the base.  Some will notice that the small square blocks came whole, they did not come with side slats for the rebar.  I used a powerful drill with a cement bit, was able to drill out a couple holes down each side to chip that out.  Most of the holes have been filled with cement and packed around the rebar.  More evident on the turns there are huge spaces between blocks.  Use cardboard to attach to the outside or inside of these spaces, using rocks to hold the cardboard in place and fill in those spaces outside the middle of the blocks.

We now have a solid cement ring that is level.  We have back filled and leveling the yard and our pond is indeed 4" above the grade level of the back yard.

Several months of work has brought us to this milestone.  The bog is the last thing to be dug out and commencement of the plumbing will be next.

A view from the patio and house.

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