Patent ID: 7056058
Filing Date: 2006-06-06
Classification: A01G,E01C,E01F,E02B,E03F,Y02A

Abstract:
1. A roadway or other transport corridor drainage system comprising: at least the edge surface of the roadway or other transport corridor being formed by a drainage structure which is generally flat in nature and is for use mainly in a horizontal or substantially horizontal disposition, and comprises top and bottom plate members which are held spaced apart by spacer members so that the structure is cellular in nature with the cells hydraulically interconnected with each other, the plate members having apertures therein which are disposed so that the apertures in the top plate member are offset relative to the apertures in the bottom plate member, and wherein there are web walls extending between adjacent spacer members at the lower plate member and form at their top edges, weirs for water which is retained by the web walls, wherein the top edges of the web walls are curved, notched or otherwise shaped or the walls have apertures, to cause the water spilling over these edges into adjacent cells at a varying velocity profile to increase the oxygenation of the water as it splashes on falling from the weir top edges; the voids within the drainage structure being filled with aggregate material, being permeable to water, such that water can flow therethrough; a water permeable drain located at least below said drainage structure; and a water permeable retention tank connected to said permeable drain, such that runoff passes through the permeable surface of the draining structure into the permeable drain and into the permeable retention tank, where the water is stored and flows back into the soil through the walls of the tank.