Module and method for managing water and other fluids

An assembly for managing the detention or retention of fluid beneath a ground surface, the assembly comprising:

• at least one first module and at least one side module;
• wherein the at least one first module comprises:
• a deck portion having a main section and a thickness, the deck portion having straight first and second side edges along their length, the first and second side edges extending in a first direction between first and second ends each having a corresponding end edge, the end edges being straight along their length between the first and second side edges;
• first and second spaced-apart supports that extend downward from the deck portion;
• wherein the deck portion is located on top of the first and second supports, and the first and second supports are load-bearing;
• wherein the first support has an outer side edge that is spaced inwardly from the first side edge of the deck portion so that part of the deck portion extends beyond the outer side edge of the first support to form a first cantilevered section of the deck portion, the first cantilevered section extending laterally from the main section;
• wherein the second support has an outer side edge that is spaced inwardly from the second side edge of the deck portion so that part of the deck portion extends beyond the outer side edge of the second support to form a second cantilevered section of the deck portion, the second cantilevered section extending laterally from the main section opposite the first cantilevered section;
• wherein a first outer longitudinal channel is at least partially defined below the first cantilevered section, the first outer longitudinal channel permitting fluid flow therein in the first direction;
• wherein a second outer longitudinal channel is at least partially defined below the second cantilevered section, the second outer longitudinal channel permitting fluid flow therein in the first direction,
• a cross channel extending below the deck portion in a second direction substantially perpendicular to the first direction, the cross channel permitting fluid flow therein;
• wherein the first and second supports have a lower portion extending upward from a bottom of the first module and spaced inwardly from a nearest one of the first and second end edges of the deck portion so that the first and second ends of the deck portion extend beyond the lower portion of a nearest one of the first and second supports to partially define outer cross channels in the second direction below the first and second ends of the deck portion, the outer cross channels permitting fluid flow therein, and
• wherein the outer longitudinal channels, cross channel and outer cross channels of the first module are in fluid communication with one another;
• wherein the at least one side module comprises:
• a deck portion having a main section, first and second side edges and first and second end edges;
• at least two supports disposed below the deck portion and extending to a bottom of the side module;
• the supports being spaced apart, at least two of the supports together with the deck portion at least partially defining an interior channel of the side module, the interior channel permitting fluid flow therein, and
• wherein one of the supports comprises a wall.