Abstract: A hollow drywell apparatus adapted to being positioned beneath the ground and to receive surface water for discharge over a subsurface area in the ground is provided. The drywell has a top with a large diameter top port, a side wall with a plurality of smaller diameter drain-type ports generally uniformly distributed about the drywell side wall surface, and an open bottom. The top port receives a collector assembly acting as a surface drain. Optional larger diameter inlet ports may be formed in the sidewall to provide interconnection between and ganging of adjacent drywells. A diverter is positioned over each drain-type port along either the drywell wall surface exterior, or optionally the wall surface interior. Each diverter laterally dispenses water from the drywell interior while blocking back fill from entering the drywell assembly interior.

Abstract: A composite drywell, a drywell system and method employing the composite drywell, which composite drywell comprises a cylindrical drywell having a removable top and bottom section, the drywell composed of a plurality of separate, edge-interlocked, arcuate sections which together form the cylindrical wall of the drywell, each arcuate section having a one side edge with a opening extending substantially the length of the side edge and the other side edge having a beaded side edge extending substantially the length of the arcuate section, the beaded edge of the arcuate section adapted to fit in an interlocking, receiving relationship into the other side edge opening of the adjacent arcuate section so as to have all arcuate sections interlocked to form a cylindrical drywell wall.

Abstract: A drywell cover to cover a drywell and a drywell system employing the drywell and cover wherein the drywell cover comprises a base cover having a raised, central wall section such as a round cylinder and an open inner section and a plurality of at least three therein supporting rib elements on the top surface of the base cover and extending from the periphery of the base cover to the raised wall section.

Abstract: A drywell cover to cover a drywell and a drywell system employing the drywell and cover wherein the drywell cover comprises a base cover having a raised, central wall section such as a round cylinder and an open inner section and a plurality of at least three therein supporting rib elements on the top surface of the base cover and extending from the periphery of the base cover to the raised wall section.

Abstract: A composite drywell, a drywell system and method employing the composite drywell, which composite drywell comprises a cylindrical drywell having a removable top and bottom section, the drywell composed of a plurality of separate, edge-interlocked, arcuate sections which together form the cylindrical wall of the drywell, each arcuate section having a one side edge with a opening extending substantially the length of the side edge and the other side edge having a beaded side edge extending substantially the length of the arcuate section, the beaded edge of the arcuate section adapted to fit in an interlocking, receiving relationship into the other side edge opening of the adjacent arcuate section so as to have all arcuate sections interlocked to form a cylindrical drywell wall.

Abstract: An improved drywell, drywell system and method of controlling the flow and distribution of surface water employing a drywell, the drywell comprising a plastic, cylindrical drywell adapted to be positioned beneath the ground, which drywell has at least one large diameter port in the cylindrical wall of the drywell to receive or discharge surface water and a plurality of smaller diameter drain ports, generally uniformly distributed about the cylindrical wall surface of the drywell and a removable bottom cover and a removable top cover, the large and the small diameter ports having a mechanically weakened inner peripheral section, the inner section adapted to be easily removed (knocked out) prior to use. By selection of the ports to be removed the direction and distribution of the flow of surface water beneath the surface may be controlled.

Abstract: An improved drywell system and method of controlling the flow and distribution of surface water employing a drywell, the drywell including a cylindrical drywell adapted to be positioned beneath the ground, which drywell has at least one large diameter port in the cylindrical wall of the drywell to receive or discharge surface and a plurality of smaller diameter distribution ports, generally uniformly distributed about the cylindrical wall surface of the drywell and a removable bottom cover and a removable top cover, the small diameter distribution ports having a conical shape to receive tapered plugs, the plugs adapted to be easily removed or installed prior to use by selection of the plug so that the direction and distribution of the flow of surface water beneath the surface may be controlled.