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Drainage gradient (DG) is a term in road design, defined as the combined slope due to road surface cross slope (CS) and longitudinal slope (hilliness). Although the term may not be used, the concept is also used in roof design and landscape architecture. If the drainage gradient is too low, rain and melt water drainage will be insufficient.
Storm drain - Wikipedia ... Storm drain
Cross slope - Wikipedia ... Cross slope
Lanes Group was formed in Leeds in 1992 [4] as a drain cleaning and repair specialist at which time they employed just five people.. In 2010, Lanes Assistance Services, a claims management company owned by the group, was the subject of a £12 million management buyout backed by private equity firm Gresham.
Land drains. The purpose of a land drain is to allow water in wet or swampy ground to rapidly drain away [1] or to relieve hydrostatic pressure. They are subterranean linear structures which are laid to a fall which should be as steep as practicable. They are used in agriculture and in building construction sites.
Do not place in the street, and avoid blocking bike lanes, sidewalks, fire hydrants, mailboxes, storm drains, and water meters. For safety, refrain from interfering with sight distances at ...
Sustainable drainage system
French drain - Wikipedia ... French drain