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[[File:geotextile-RS380I.jpg|400px|thumb|right|Geotextile rolled out on subgrade surface
[[File:geotextile-RS380I.jpg|400px|thumb|right|Geotextile rolled out on subgrade surface]]
Geotextiles are filter fabrics that can be installed to separate dissimilar soils and prevent the migration of materials. Geotextiles are recommended for installation at the bottom and side limits of the LID feature and should be implemented at the discretion of the engineer.
Geotextiles are filter fabrics that can be installed to separate dissimilar soils and prevent the migration of materials. Geotextiles are recommended for installation at the bottom and side limits of the LID feature and should be implemented at the discretion of the engineer.