Advice - Drainage on uneven rock that slopes to house

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Old 10-10-14, 10:32 AM
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Advice - Drainage on uneven rock that slopes to house

Hello!

I recently removed a garden adjacent to my entrance because the retaining wall was collapsing, the drainage was not working and the wall restricted movement to the back yard. I would like to keep most of the rock exposed but, at the bottom, create a drainage system incorporating a much smaller wall, possibly starting a foot higher up on the rock. If a wall is not needed, that would be great as well.

The water can drain at the lower right of the picture, where you can see the current retaining wall's corner. The rock is very uneven, so if I lay weeping tile, I need to level the area underneath the pipe to direct the water.

If you need any other information please let me know. I would much appreciate any guidance!

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Old 10-11-14, 05:27 AM
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& if you create an open drainage trench, what happens ?
 
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Old 10-14-14, 03:43 PM
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Thanks for the reply!
I'm not certain how I would do that on the rock. I'm guessing that it would be with forms and concrete?
The temperatures here vary from extremes of -40C to +40C.
 
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