GSE is excited to release the New Interactive Online Drainage Design Manual site. This site is in collaboration with our Drainage Design Manual to assist in specifying the most cost-effective drainage systems on the market, provide product review and selection, and preparation of construction details. The Drainage Design Manual was written collectively by industry design professionals with the 1st Edition released in July 2004 then the 2nd Edition in June 2007. A 3rd Edition is forthcoming.

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