Patent ID: 7517172

Claim:
A leaching chamber comprising: a corrugated outer shell extending along a longitudinal axis in a manner defining alternating peak corrugations and valley corrugations, said corrugated outer shell having an arch-shaped cross-section with a pair of opposed lateral end walls formed therein and no floor; and a plurality of inner walls attached to an interior wall of said corrugated outer shell, each at a location within a separate interior valley formed in said interior wall, with each of said interior valleys corresponding to a peak corrugation formed in said outer shell, said plurality of inner walls extending from a location of attachment to said interior wall to a terminus of a respective one of said interior valleys, each of said plurality of inner walls extending in a manner inwardly spaced from said corrugated outer shell to define a plurality of interior chambers, wherein each of the plurality of interior chambers has an inner wall aperture formed in said respective inner wall and an outer shell aperture formed in the corrugated outer shell.