Abstract: A stormwater filtration system includes a dry well structure including a top having an access opening, a bottom and a sidewall extending between the top and the bottom to define an internal volume of the dry well structure. A deck assembly partitions the dry well structure into an upper region and a lower region. The deck assembly includes a plurality of deck members sized to be delivered through the access opening of the dry well structure and configured to be assembled within the internal volume to form the deck assembly.

Abstract: A temporary trap having baskets and optionally filters in the baskets used in conjunction with inlets for sewer systems to keep debris, oils or chemicals from being washed into the sewer during construction of roads and sewers. The trap is a box, typically rectangular, square or round, with baskets having a plurality of holes therein for allowing water to pass therethrough while trapping debris therein. The trap is inserted into a inlet by lifting the grate off the inlet frame, inserting the trap and then replacing the grating. After a rain the baskets and filters may be cleaned out and reused or replaced. When the construction project is finished the grate is lifted off the inlet frame and the trap removed. The trap has an overflow opening in case the trap becomes clogged.

Abstract: A disposable drain strainer is removably received within a drain opening having an adjacent drain rim substrate. The strainer has a strainer portion, a ring portion, and a seal release mechanism. Top and bottom surfaces of the ring portion are adapted to sealingly engage the drain rim substrate. The seal release mechanism is integral with the ring portion, and facilitates release of the seal so that the strainer can be readily be removed from the sink and discarded. In one aspect, the seal release mechanism comprises a tab. In another aspect, the seal release mechanism comprises a press-release component, wherein the ring portion has arced ring walls having convex and concave configurations. During sealing engagement with the drain rim, the ring portion is in the convex configuration. Pressure applied to the ring portion causes it to move to the concave configuration.

Abstract: A system for filtering debris carried by stormwater flowing through a gutter inlet into a catch basin utilizes a filter device configured to conform to and to substantially fully cover the gutter inlet and a retainer device for maintaining the filter device in place covering the gutter inlet. The retainer device is attached to the filter device and configured to extend through the gutter inlet to hang gravitationally downwardly into the catch basin. The retainer device is weighted to gravitationally pull and hold the filter device securely against the gutter inlet against dislodgement under the forces of flowing stormwater.

Abstract: A catch basin filter having apertures and holding a silt barrier material may be securely attached to a drop inlet grate. The catch basin filter has apertures for preventing debris from entering the drop inlet and clogging sewers. A silt barrier material wrapped around the catch basin filter housing provides a study and stable platform for holding the filter in place around the drop inlet such that silt will not be able to enter the sewer and clog it up. The catch basin filter is quickly and easily attached to and removed from the drop inlet by a rod having a hook for extending through the grate bars and then turning the rod to engage the bars on the drop inlet grate to hold the catch basin filter in place. The catch basin filter is durable and reusable and the silt filter material may be easily replaced.

Abstract: A drainage system for separating oil and debris from water run-off wherein a chamber in the path of flow of the run-off includes a downwardly inclined screen and a debris-collecting fence beneath the screen to maintain separation between the debris and water; and an organic absorber may be positioned in the path of flow of the water beneath the screen to remove organic oils from the run-off.

Abstract: A storm drain filter is provided for filtering trash and debris from a stream of water passing through a storm drain. The storm drain filter comprises a panel having a multiplicity of openings formed therein and is adapted to mount adjacent to a sidewall of a storm drain such that the filter lies adjacent an outlet through which water passing from the storm drain flows. When installed in a storm drain, the filter fits relatively close to the outlet and the adjacent sidewall and permits water to flow through the openings thereof, but filters trash and debris.

Abstract: An in-line storm water drain system and a filter basket for a storm water drain system are provided in which the storm water drain system has a housing having an inlet and outlet thereinto and interior walls forming a plurality of chambers therein. The filter basket has a rigid frame and a plurality of screened sides and is attached to the interior walls. The filter basket has a pair of top screen filter doors and a pair of bottom screen filter doors to allow entry into the filter basket and on through to the bottom of the filter basket for cleaning the chambers. An inlet feed chute is attached to the filter basket open end and also has a screen bottom door and directs water from the housing inlet to and through the filter basket while collecting debris in the basket.

Abstract: A method and apparatus for separating oil and debris from urban water run-off, the apparatus being made up of a chamber which is mounted in a storm drain system and has an inner basin with a tilted wire wedge wire screen filter in the path of flow of the run-off, an organic absorber floats on the water as it is collected in the basin, and a discharge plate has a series of slots which are sized to regulate the flow rate of discharge of the water from the basin for removal through an outlet at the lower end of the chamber. The method and apparatus are conformable for use with existing storm drain systems along curbs or gutters as well as parking lots, runways and the like.

Abstract: A drain cover and pipe combination comprises a drain cover including a substantially elliptical frame portion defining a space, the space having an axis substantially normal to the frame, and at least one cross piece located in the space so as to define a plurality of openings in the drain cover. The pipe comprises a substantially tubular member having a longitudinal axis, with the pipe having a substantially elliptical shaped rim at one end thereof with a rim axis which is other than parallel to the longitudinal axis of the tubular member. Securing means are provided for securing the drain cover over the rim of the pipe.

Abstract: A storm sewer inlet grate is provided, which is temporary and removable, to keep trash and debris and eroded soil out of a storm sewer. There are two parts: a rectangular box made of steel re-bars and steel mesh, and surrounding mesh bags filled with gravel and made of wire mesh. The device is placed in a gutter parallel to and against the street curb opening of the storm sewer drain. The mesh bags are easily removable one by one.

Abstract: A pivoted gate across an opening from a gutter into a collector basin. An actuator inside the basin is insensitive to slow flow rates, but includes a rotor with vanes that actuate an opening linkage at sufficiently high rates of flow. A float is included in the actuator to exert a gate-opening torque when the rotor is flooded.

Abstract: An automatically openable and closeable gate system that will find primary use with the street curb opening to a catch basin or vault of a storm drain system, and for other similar openings, the system having a gate which during dry and low-flow water drainage situations will be in a closed position such that items of trash, debris, litter, leaves and the like will be prevented from entering the basin, vault or system, yet in periods of heavy rainfall or other heavy water run-off situations will automatically open to allow free flow of water into the basis or vault to alleviate water accumulation in the adjacent street and other surrounding areas.

Abstract: An apparatus for construction site erosion control for temporarily enclosing the curb inlet of a storm drainage system during construction of a road system in commercial and residential developments is adapted to be placed adjacent a curb inlet of a storm drain in order to enable storm water runoff to drain into the inlet while preventing silt and debris from being carried into and collected therein. The apparatus includes a grate constructed to seat upon an open end of a storm drain inlet, means for filtering debris from storm water runoff passing through the means and through the grate, into the storm drain inlet; and means for securing the grate to a storm drain protection bar.

Abstract: The invention relates to an integrated belowground vault with filter catch basin, that allows the runoff water to enter into a belowground two-part vault passing through a commercially available replaceable filter before being transferred out to the sewer, flood control system or out through a French drain consisting of a cavity below the device that is filled with drain gravel. A layer of filter cloth can optionally be placed over the drain gravel. This device will be manufactured in variety of sizes and shapes and made from several different materials. The device has the unique ability of being capable of filtering low flow water runoff while allowing high volume to pass through with the added benefit of not retaining water that can become a mosquito breeding ground.

Abstract: A system for treating storm water in situ within a storm water drainage system includes a process chamber and treatment material that is contained within the process chamber. Preferably, the treatment material is a material that is effective in removing heavy metals from storm water, such as zeolite. A first passageway is provided for admitting storm water from the storm water drainage system into the process chamber. A second passageway is provided for returning storm water from the process chamber back to the storm water drainage system. Also disclosed is a method of retrofitting conventional storm water drainage systems so as to render them capable of effectively removing heavy metals from storm water passing therethrough.

Abstract: A storm water filter system apparatus includes a housing having an inlet and an outlet and has a floating filter basket therein having an open end portion. A scoop formed on the front end of the filter basket is positioned to face the inlet to the housing. The filter basket has a least one float attached thereto in a position to float the filter basket in water in the housing to position the filter basket open end and scoop in front of the housing inlet and at least partially above the water level in the housing to capture floating debris from the entering storm water so that the floating filter basket adjusts for varying water levels in the housing.

Abstract: A drainage system design method and apparatus including a computer program that enables a computer user to design and obtain computer-generated stackings of drainage system structures such as manholes. The user inputs dimensional and structural information concerning the drainage system. The program is operable to access a set of predefined drainage system components and, using the inputted dimensional and structural information, the program determines different configurations of the predefined components that represent a structure contained in the drainage system. The program displays different configurations of stackings sorted based on predefined goodness criteria. The program can also determine one or more drainage system designs that comprise a configuration of the predefined components for each of two or more of the structures contained in the drainage system, and can display and output site plans, elevational views, shop drawings, and bills of material.

Abstract: A temporary trap having baskets and optionally filters in the baskets used in conjunction with curb inlets for sewer systems to keep debris from being washed into the sewer during construction of roads and sewers. The trap is a box, typically rectangular, square or round, with baskets having a plurality of holes therein for allowing water to pass therethrough while trapping debris therein. The trap is inserted into a curb inlet by lifting the grate off the curb inlet frame, inserting the trap and then replacing the grating. After a rain the baskets and filters may be cleaned out and reused. Optionally, when the construction project is finished the grate is lifted off the curb inlet frame and the trap removed. An optional cloth filter for insertion into the trap filters finer debris from entering the sewer system. The trap has an overflow opening in case the trap becomes clogged.

Abstract: A pollutant containment system for containing the spillage of fuels or other hydrocarbons or the like comprises a first layer (14, 60), a containment vessel (16) for receiving liquid passing through the layer (14) and channelling means (22) for directing liquid permeating through the layer towards the containment vessel (16). The layer (14) provides a plurality of active surfaces for the retention of pollutant and is such as to cause water to permeate through the layer at a flow rate to avoid emulsification of oil and water. Water is introduced into and removed from the containment vessel to raise and lower the water surface thereby to cause the pollutant to be smeared over the active surfaces.

Abstract: A self-cleaning composite deck drain apparatus which includes a removable top part having a top grating surface for receiving waste liquid and a trap for catching particulate matter from the liquid at a lower end. The drain apparatus further includes a bottom part having a drainpipe within an annular chamber formed thereabout for receiving and holding the top part. Circumferentially spaced locking tabs are affixed to the edge of the top part below the grating surface thereof for reception within tab receivers in the bottom part when the top part is inserted into the chamber of the bottom part and turned for locking of the tabs within the tab receivers. The top part includes a threaded bore within which a valve is manually operable to open and close the drainpipe. The deck drain apparatus is made of composite plastic materials to resist corrosion.

Abstract: A filtration system is provided which generally includes a filter assembly and a connector assembly coupled to the filter assembly and structured to position the filter assembly in a drain, for example a storm drain. The connector assembly may include adjustable connectors in order to accommodate various flow conditions. The system may further include a diversion element designed to effectively direct an inflow of water into the filter assembly and a removable contaminant removal pillow.

Abstract: A drain inlet is disclosed for draining of liquid from an area in which it has collected. The inlet includes a body having a chamber therein for receiving the liquid from the area and an opening at the bottom of the body for draining the liquid from the chamber. The body is formed by a plurality of side walls each of which has a lateral cross section which is greater than the next adjacent lower side wall which permits a substantial reduction in the height of the body. The bottom of the side walls is connected to the top of the next lower side wall by a laterally extending wall which has a plurality of elongated slotted openings so that the fluid to be drained flows upwardly through these openings, into the chamber and out of the chamber through the opening at the bottom of the body to drain the area.

Abstract: A storm drain system (10) contained in the ground (36) contains a standpipe (12) having a bottom section (18) having perforations (20) where a porous pavement (22) surrounds the top portion of the standpipe (12), where, beneath the porous pavement is a substructure of coarse aggregate, all surrounded by a non-porous base material (34), such as concrete, where a storm drain (28) connects to the standpipe by a top outlet pipe (30), where water (38, 40) and liquid impurities (42) are separated from storm water runoff by a non-perforated section of the standpipe.

Abstract: One of the exemplary filter systems described includes a bracket and a filter module that can be suspended from the bracket by a plurality of flexible supports. The bracket can support the filter system beneath the grate of a storm drain without the need for the filter system to be attached to the grate. The grate can be lifted out of the storm drain separately from the filter unit, which allows the filter system to be lifted without the added weight of the grate. When the grate has been lifted out of the way, a suitable fastener structure can be attached to the bracket of the filter system to make the use of mechanical lifting devices more convenient. The bracket can be manufactured to known dimensions, or it can be offered from among a set of brackets that are pre-configured for known storm drain dimensions or as a standard bracket that can be modified to fit the dimensions of a particular storm drain.

Abstract: A hydraulic-permeation type environmental water-runoff filtration-system applicable to street curb-inlet type drainage-chambers, which generally cooperatively interconnect with street and parking-lot drains. The BLUEBAY-BMP™ pollution-trap provides advantage of community-tailored filtering stages, the preferred embodiment seting forth a convenient user-friendly prefabricated-kit assembly employing a basic build-in-place containment-housing which can be readily adapted to the studied needs of a given community,—without incuring alteration of existing sewer-stormdrains.

Abstract: A curb-and-grate inlet filter is provided for temporarily covering, during nearby construction activities, the curb-and-grate inlet of a storm drainage system so as to filter from storm water runoff silt and debris attendant such construction. The curb-and-grate inlet filter includes a body having a first and a second portion formed of interconnected coils. The filter also includes a filter medium that may enclose the body. The filter medium filters silt and debris from water passing through the filter and into the curb-and-grate inlet.

Abstract: A drainage grate assembly having a drainage grate which is reinforced by a substantially continuous reinforcing member confined within the grate. The load rating for the drainage grate assembly can be adjusted by adding metal strips which can be disposed within and retained by the reinforcing member.

Abstract: The present invention provides a gutter screen attachment for minimizing water film runoff and debris collection adjacent a screened gutter. The screen attachment comprises a superior breaker edge, an inferior breaker edge, and a screen-receiving region. The screen-receiving region comprises an edge-receiving fold that accepts the gutter-engaging edge of a gutter screen. The superior breaker edge extends upwardly opposite the inferior breaker edge and is designed to break the water tension of a water film formed upon the gutter screen. The inferior breaker edge is designed to prevent water leakage between the screen attachment and the gutter. The superior breaker edge is of minimized height so as to allow bulky debris to translate over the superior breaker edge. It is thus contemplated that the superior breaker edge functions to allow water to more properly permeate through the gutter screen.

Abstract: An erosion control basin is a molded open topped receptacle that has support flanges that will support the basin on the interior of a storm drain grate frame. A filter is formed around an upright perforated drain pipe that is on the interior of the basin and which opens to an outlet. The basin catches debris and silt but permits water to drain out. The top of the drainpipe is left open for overflow purposes.

Abstract: A catch basin filtration system having a filter body dimension to fit within a drain inlet forming a trough or reservoir obstructing at least a portion of the inlet. The filter body is supported by a filter body support dimensioned to cooperatively engage with the interior walls of the inlet and with the filter body to substantially maintain said filter body in a pre-selected shape and position within the inlet. One or more connectors removably connect the filter body to the filter body support. One or more adjustable high fluid flow bypasses prevent the system from backing up and flooding surrounding areas during periods of high fluid flow.

Abstract: A drain filter device includes a body formed from wire mesh having a plurality of side edge portions integral with each other and forming a substantially square shape. The body further has substantially planar top and bottom surfaces and includes a plurality of elongated support rods having opposed end portions extending along the plurality of side edge portions respectively. The device further includes a top section having a substantially cylindrical shape and connected to the body. The top section is adaptable to be positioned substantially centrally about drain and for filtering out particulate materials suspended in water entering the drain. Advantageously, the top section traps and maintains particulate materials about a perimeter of a drain and not directly above same.

Abstract: A surface water runoff filtration device comprises an intake which is adapted to receive storm water and other surface water runoff. The surface water runoff flows from the surface through the intake to a point below the filter media, and then up toward the surface through the filter media. This device may be used in both catch basin storm drains and inline drains.

Abstract: An apparatus for connection of a drain inlet to a vertical fixed runoff drainage pipe includes an intermediate adapter plate with a cylindrical shank that can be inserted in an impervious manner into a drainage tube at an adjustable relative height. The drain is slidably mounted such that it is guided bilaterally in translation over the plate. In this way, the drain can be disposed at a final determined position in relation to a curb before being sealed to the curb.

Abstract: A trench drain filtration system having a filter body dimensioned to fit within a trench drain forming a trough or reservoir obstructing at least a portion of the trench drain. The filter body is supported by a filter body support dimensioned to cooperatively engage with the trench drain and with the filter body to substantially maintain said filter body in a pre-selected position within the inlet. One or more connectors removably connect the filter body to the filter body support.

Abstract: A catch basin filtration system is disclosed. A filter body is dimensioned to fit within an drain inlet forming a trough obstructing at least a portion of the inlet. The filter body is supported by a filter body support dimensioned to cooperatively engage with the interior walls of the inlet and with the filter body to substantially maintain said filter body in a pre-selected shape and position within the inlet. One or more connectors removably connect the filter body to the filter body support.

Abstract: A street curb drain filter is comprised of U-shaped brackets for attaching to an inside wall of a street curb drain adjacent an inlet. A horizontal retaining bar is attached to the outer ends of the brackets. The lower edge of a horizontally elongated flexible net is attached to the retaining bar. The upper edge of the net is connected to the interior ceiling of the drain with eye bolts and S-hooks. A horizontally elongated debris basin is supported within the brackets. A filter media pack is positioned inside the basin adjacent a perforated outer wall of the basin. Water flowing from the street into the drain is directed through the filter. When runoff is relatively light, debris flowing into the drain is collected inside the basin. When runoff is relatively heavy or when the basin is clogged, debris bypassing the basin is filtered by the net.

Abstract: A pivotal gate system to be installed across the drain opening to a catch basin of a storm drain system and having a catch basin blocking gate that is adapted to rotate from a closed position extending completely across the drain opening at which to trap and prevent leaves, litter and other debris from entering the catch basin during dry periods and light rainfall to an open position removed from the drain opening at which to permit rainwater to enter the catch basin during periods of heavy rainfall. A water wheel is mounted for rotation within the catch basin. The water wheel is coupled to the catch basin blocking gate by way of a pulling cable. The water wheel rotates in response to impact forces caused by rainwater dropping downwardly on a plurality of scoops extending around the water wheel. A rotation of the water wheel generates a pulling force in the pulling cable to be applied to the catch basin blocking gate whereby to cause the blocking gate to move from the closed position to the open position.

Abstract: A cover for a drainage device, in particular a drainage channel with a channel body such that the cover can be set on an upper edge of the channel body, which comprises detent ridges that extend into the channel body and which has at least one fixing element to attach the cover to the channel body or to a frame disposed on the channel body to reinforce its upper edge, such that in a locked state the fixing element engages a recess in the channel body or frame. In order to achieve durable fixation of the cover on the channel body, while enabling the fixing element to be simple to manufacture and install, and the channel cross-section to remain free, the detent ridges comprise at least one aperture to guide the fixing element, which projects out of that aperture.

Abstract: A preferred drainage system grate assembly (10) broadly comprises a grate (12), a frame (14) to support the grate (12), and a locking device (34) to hold the grate (12) within the frame (14). The grate (12) comprises two or more crossbars (16) and a plurality of tread bars (18). Each crossbar (16) spans a watercourse (20) of a drainage system (21) and is supported by the frame (14) at both ends. The crossbar (16) includes an integral flange (56) that protrudes from the crossbar (16) substantially horizontally and at least one hole (60) centered within the flange (56). The locking device (34) includes a penetration (46) where a bolt (36) is inserted through the hole (60). As the bolt (36) is turned, the locking device (34) is raised until it contacts the frame (14), thereby securing the grate (12) within the frame (14).

Abstract: A drain cover and pipe combination comprises a drain cover including a substantially elliptical frame portion defining a space, the space having an axis substantially normal to the frame, and at least one cross piece located in the space so as to define a plurality of openings in the drain cover. The pipe comprises a substantially tubular member having a longitudinal axis, with the pipe having a substantially elliptical shaped rim at one end thereof with a rim axis which is other than parallel to the longitudinal axis of the tubular member. Securing means are provided for securing the drain cover over the rim of the pipe.

Abstract: A sheet mesh of plastics material for application to roof guttering to prevent the entry of unwanted materials into the guttering. In use the mesh is affixed along one edge to the roof and along the opposite edge (46) to the top outside edge of the guttering. The mesh comprises a first array of parallel strands (42) aligned in a first direction integrally moulded with a second array of parallel strands (44) aligned substantially at right angles to the first array. The strands (44) in the second array are made from a stiffer material than that from which the strands in the first array (42) are made. The mesh is preferably manufactured as a co-extrusion of LDPE-rich and HDPE-rich materials.

Abstract: An improved drainage grate assembly having a reinforcing assembly which is capable of providing substantially continuous support to non-apertured portions of the drainage grate. The load rating for the drainage grate assembly can be adjusted by adding metal strips to the reinforcing assembly.

Abstract: A waste water outlet unit, for a shower tray having a drain opening, comprises a base element which is locatable on the underside of the shower tray to cover the drain opening, and a clamp element which is locatable on the topside of the shower tray and which is engageable with the base element to clamp the base element to the underside of the shower tray. The clamp element has an aperture through which waste water from the shower tray can pass into the base element, and a filter element which is positionable over the aperture and which can be removed to enable access to the interior of the unit while maintaining the engagement between the base and clamp elements.

Abstract: This invention is a filter for a street curb inlet catch basin that comprises a removable filter basket assembly, a funnel to channel storm water into the basket, and a support structure that holds the filter in place within the basin by means of bracing the structure against the basins interior walls without altering the interior walls of the basin.

Abstract: A catch basin filtration system is disclosed. A filter body is dimensioned to fit within a drain inlet forming a trough or reservoir obstructing at least a portion of the inlet. The filter body is supported by a filter body support dimensioned to cooperatively engage with the interior walls of the inlet and with the filter body to substantially maintain said filter body in a pre-selected shape and position within the inlet. One or more connectors removably connect the filter body to the filter body support. One or more adjustable high fluid flow bypasses prevent the system from backing up and flooding surrounding areas during periods of high fluid flow.

Abstract: A storm drain filter system apparatus includes a skimmer tray having a sediment collection closed bottom and having an inlet side and an outlet side and a hydrocarbon absorbing boom. A plurality of boom support brackets each has a boom holding portion for holding the boom therein and a spacing arm extending from the boom holding portion and attached to one side of the skimmer tray to space the boom in the boom holding portion between the inlet side and the outlet side of the skimmer tray. The skimmer tray extends all or partly around the storm drain opening forming an open center area to allow overflow liquid to flow over the outlet side through the middle area. Sediment is collected in the bottom of the skimmer tray and the boom is supported spaced between the inlet and outlet side of the skimmer tray to capture hydrocarbons and liquid entering the skimmer tray. The liquid enters the skimmer tray on one side of the boom and out the other side of the boom.

Abstract: A system to exclude trash from curbside drains during periods of no or slow water flow, but opening to permit full entry during heavier flow such as during heavy rains. The system may have a linkage preventing opening by force on its barrier, and to assure that it will remain open should downstream drainage systems become flooded.

Abstract: An interior pipe has an upper end, a lower end and a central extent. An exterior pipe has an upper region receiving the central extent of the interior pipe and a lower region receiving the lower extent of the interior pipe. The lower region terminates with a removably coupled plug. A T-shaped pipe has an upper, lower and central portions. The upper portion is coupled with respect to the interior pipe. The lower portion is coupled with respect to the exterior pipe. The central portion is adapted to be joined to a wastewater line. Water passing from the sink will flow downwardly through the interior pipe and upwardly through the space between the interior and exterior pipes passing through one or more screens, then laterally through the central portion of the T-shaped pipe.

Abstract: A dual-action vent check valve is disclosed. The valve includes a first check valve which is responsive to elevated fluids inside the valve. A second check valve is responsive to elevated fluids external to the valve. The first check valve prevents overflow from a vented structure, such as a sewer out-fall line, from passing through and out of the valve, thereby preventing spills. The second check valve operates to prevent floodwater from passing into an underground structure, such as a sewer, through the vent. One embodiment of the invention includes a basket for enclosing a deodorizing material inside the valve for deodorizing gases which pass through the valve.