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retaining wall

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Fill behind a retaining wall 2009-02-05
From Fausto:
i'm trying to figure out how many cubic yards i will need. I built a retaining wall that it's 5 feet high, running 90 feet long. There is a slope running to the wall of 24 degrees. The distance from the top of the slope to the wall is 12 feet. I don't know how to calculate how many cubic yards of fill dirt i need in there. Please help. Thanks!
Answered by Harley Weston.
 
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