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Depth Of Trenches

Categories: DRAINAGE

Underdrains may be placed too deep in close soils

for best results. In an early day it was advised that the drains be put

down 4 feet deep. We now know that a tight clay soil may give best

results from a drain only 28 inches deep, or even a little less. In a

looser soil 3 feet is a better depth, and in porous swamp lands the

drain may well go 4 feet deep, thus permitting increase in distance

between drains.



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