Provided is a structure for operating a watertight door by use of buoyancy. The structure includes: a detention tank for storing rainwater flowing from a street inlet; a buoyant member which is installed in the detention tank; and a sensor installed in the detention tank, in which if the buoyant member raised by the buoyant of the rainwater collected in the detention tank comes into contact with the sensor, the watertight door is automatically operated. The watertight door structure manually operated at localized heavy rain is improved, and the watertight door is automatically operated if the water level reaches the predetermined level.

A rainwater conveyance system comprises a vault assembly and a drain emitter. At least a portion of the vault assembly is underground and is located above a percolation region in the ground. The drain emitter is connected to the conveyance line such that a primary portion of the collected water flows through the first portion of the conveyance line and a secondary portion of the collected water flows out of the second portion of the conveyance line through the drain emitter at a preset emitter flow rate. The drain emitter is arranged within the vault assembly, above the percolation region, and below the conveyance opening. The preset emitter flow rate is predetermined such that the flow of the secondary portion of the collected water out of the conveyance line through the drain emitter drains standing water from the conveyance line and the secondary portion of the collected water percolates through the percolation region.

A system and method for an underground stormwater storage system which may comprise a pit, a structure, and a liner. The structure may be disposed within the center of the pit and surround by the porous backfill and wherein outlets are disposed on the crown of the structure. A liner may form the outer layer of the pit. A method for releasing stormwater may comprise capturing stormwater from a surface, containing the stormwater within a structure, releasing a volume of the stormwater from the structure and draining an additional volume of the stormwater from the crown of the structure from an outlet when the structure is capturing more stormwater than it is releasing.

A feed storage arrangement for use with a sheet like feed barrier, the storage arrangement comprising at least one elongated leachate channel having an outlet end; and at least a first feed pad section extending along at least a portion of a length dimension of the leachate channel, the first pad section including first and second lateral edges and upper and lower edges wherein the first lateral edge is located proximate the leachate channel, the second edge is spaced apart from the first edge, the upper edge is proximate the outlet end of the leachate channel, and the lower edge is opposite and spaced from the upper edge, the first pad section sloped downward starting at the second edge and toward the first edge, wherein, with feed supported on the first pad section adjacent the leachate channel, the feed barrier is positionable on top of the feed with an edge portion extending over the leachate channel to a side of the leachate channel opposite the first pad section.

A catch basin trap for attachment to an opening in a side wall of a catch basin. The catch basin trap has a body with a front side for facing outside the catch basin, and a back for side facing inside the catch basin. The body defines a chamber, an inlet opening in the back side, and an outlet opening in the front side. A collapsible outlet pipe connector is attached to the outlet opening, configured to be manipulated from a collapsed configuration to an extended configuration defining a discharge end for coupling to an outlet pipe positioned outside the catch basin. The collapsed configuration stows the collapsible outlet pipe connector within the body, and the extended configuration permits watertight coupling of the discharge end to the outlet pipe. A method of installing a catch basin trap, and a method of making a concrete catch basin are also disclosed.

An underground stormwater management system comprising a sediment settling chamber, a plurality of stormwater management cells, and a trash capturing net. The sediment settling chamber has a sediment settling chamber floor and a discharge port located at a higher elevation than the sediment settling chamber floor. The plurality of stormwater management cells are located adjacent each other, and each cell comprises a body portion and an internal region, and is adapted to permit passage of stormwater into and out of the internal region of such cell. The plurality of stormwater management cells combine to form a stormwater management chamber downstream of the sediment settling chamber and in fluid communication with the sediment settling chamber. The trash capturing net is at least partially located within the stormwater management chamber and is adapted and configured to capture trash and debris in stormwater discharged from the discharge port.

A low-pressure distribution system configured to pressurize effluent and distribute it throughout pressure conduits disposed within drainage conduits. The low-pressure distribution system may pressurize the effluent such that it is dispersed along a substantial portion or the entirety of the length of the pressure conduits and/or drainage conduits. To that end, the low-pressure distribution system may ensure an efficient distribution of the effluent throughout the drainage conduits while retaining an effluent flow rate therein suitable for the growth of microbial water treating bacteria.

An underground stormwater management system comprising a sediment settling chamber, a plurality of stormwater management cells, and a trash capturing net. The sediment settling chamber has a sediment settling chamber floor and a discharge port located at a higher elevation than the sediment settling chamber floor. The plurality of stormwater management cells are located adjacent each other, and each cell comprises a body portion and an internal region, and is adapted to permit passage of stormwater into and out of the internal region of such cell. The plurality of stormwater management cells combine to form a stormwater management chamber downstream of the sediment settling chamber and in fluid communication with the sediment settling chamber. The trash capturing net is at least partially located within the stormwater management chamber and is adapted and configured to capture trash and debris in stormwater discharged from the discharge port.

A method for managing the flow of water beneath a ground surface uses modules. Assemblies of such modules are disclosed. The modules include supports and a deck portion, and the supports are spaced apart and form multiple channels with a main section of the deck portion. The deck portion also includes at least one section extending from a main section.

A stormwater treatment system and method for removing sediment, chemical pollutants, and debris from stormwater runoff by utilizing bioretention practices including physical, chemical and biological processes. Stormwater is directed into a primarily open-bottomed, multi-dimensional container whereby entrained sediment and other transportable materials are filtered and treated through a media filter layer consisting of inorganic and/or organic materials. A live plant (preferably a tree) situated within the container with roots resident in the media filter layer with the ability for expansion beyond the perimeter of the container through openings in one or more sidewalls. The treated water may be further conveyed beyond the perimeter of the container by additional openings and/or piping. A vertically positioned overflow/bypass/clean out piping apparatus may be included within the stormwater treatment system to provide additional water conveyance. Additional ancillary conveyance, filtration and storage facilities may be connected to the described stormwater treatment system as conditions warrant.