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==Grates==
==Grates==
[[File:Clogged drain.jpg|thumb|Drain clearly clogged by 9/32 = 28 %]]
[[File:Clogged drain.jpg|thumb|Drain clogged by 9 squares of 32 = 28 %]]


==Geotextiles/filter fabric==
==Geotextiles/filter fabric==

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