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→Design
|+Minimum length of filter strips<ref>http://www.dnrec.delaware.gov/swc/Drainage/Documents/Sediment%20and%20Stormwater%20Program/Functional%20Equivalents/3.06.2.9.%20Sheet%20Flow_FEQ%20JUL%202016.pdf</ref>
|+Minimum length of filter strips<ref>http://www.dnrec.delaware.gov/swc/Drainage/Documents/Sediment%20and%20Stormwater%20Program/Functional%20Equivalents/3.06.2.9.%20Sheet%20Flow_FEQ%20JUL%202016.pdf</ref>
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|colspan =2|The first 3 m of filter must be ≤ 2% in all cases.
|colspan =2|'''The first 3 m of filter must be ≤ 2% in all cases.'''
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!Slope of filter strip
!Slope of filter strip