An inlet filter includes a frame, filter material, a feed stream inlet, and a filtrate outlet. The frame includes a thick portion and a narrow portion. The frame also includes a spring-comprising portion having an adjustable height. A method includes inserting an inlet filter into a storm sewer inlet. The inlet filter can be one of a plurality of inlet filters inserted into the storm sewer inlet, the filters cooperating to filter a feed stream entering the storm sewer inlet. A system includes a plurality of inlet filters configured to be coupled together to filter a feed stream to a storm sewer inlet. The system can be configured so that the width and the height of the plurality of filters is adjustable. For example, a first inlet filter and second inlet filter can be slidably engaged with a connecting filter.

Vaults, boxes, systems, and methods of treatment systems to capture pollutants from storm water runoff and prevent the conveyance of these pollutants from entering a receiving water body or landscape area, which is designed to be a part of a local permanent storm water drainage infrastructure. A single treatment box, vault and system combines both drainage conveyance, multi-level treatment techniques, variable hydraulic capabilities, and easy and inexpensive methods for servicing the system. A flow spreader having a triangular shape with straight sides, or concave sides or convex sides can split incoming water to pass into dual screen filtration systems. Additionally, an upwardly angled debris ramp above a downwardly angled screened defector can be located on both sides of the flow spreader to help direct debris and trash into dual screened boxes. The system can also include components selected from a shelf beneath the spreader, at least one baffle, skimmer, deflectors, media filtration and hydroslide water pressure lines with spray heads for cleaning debris on a sloped floor.

Vaults, boxes, systems, and methods of treatment systems to capture pollutants from storm water runoff and prevent the conveyance of these pollutants from entering a receiving water body or landscape area, which is designed to be a part of a local permanent storm water drainage infrastructure. A single treatment box, vault and system combines both drainage conveyance, multi-level treatment techniques, variable hydraulic capabilities, and easy and inexpensive methods for servicing the system. A flow spreader having a triangular shape with straight sides, or concave sides or convex sides can split incoming water to pass into dual screen filtration systems. Additionally, an upwardly angled debris ramp above a downwardly angled screened defector can be located on both sides of the flow spreader to help direct debris and trash into dual screened boxes. The system can also include components selected from a shelf beneath the spreader, at least one baffle, skimmer, deflectors, media filtration and hydroslide water pressure lines with spray heads for cleaning debris on a sloped floor.

The present invention discloses the stormwater source filtration system in which the treatment location is at the first point of water collection, as close to the source of contamination as possible. This provides for a modular, flexible, linear treatment system that can adapt to the existing conditions and the existing roadway profiles. Like our road systems, this is linear and can change with the roadway. This system provides for increased storage capacity immediately adjacent to the roadway. Modular and flexible construction make this system of superior cost effectiveness versus the current filtration systems used today. The ease of maintenance and ability to quickly change the filtration media as needed will reduce long term maintenance costs versus current systems. The disclosed system may be installed in both new constructions and as an enhancement/retrofit of existing systems.

A slip coupling for a work machine includes a main clutch in the form of a friction-based and spring-operated slip clutch. The slip coupling further includes an auxiliary clutch configured to maintain a pre-set spring-induced clamping force on friction plates of the slip clutch, when the slip coupling rotates in a forward direction, and further configured to be able to increase the spring-induced clamping force, when the slip coupling rotates in a reverse rotational direction. The increase of the clamping force is enabled by the fact that one of two auxiliary clutch parts is axially movable when the slip coupling rotates in the reverse rotational direction, the axial movement actuating an increase in pre-tension of mechanical spring or springs of the slip clutch. A work machine such as a combine harvester equipped with the slip coupling is also described.

A ditch check system and methods for storm water control are provided. The ditch check system can include a velocity-restricting component of non-woven geotextile fabric with one or more porosities configured to control the velocities of storm water flows for sediment control and silt retention. The velocity-restricting component can have one or more reinforcing elements to provide additional support to protect against tearing and/or undue movement of the fabric, as well as provide attachment points for fasteners used to fasten the fabric to support members. The ditch check system can further include a front water seal and a rear scour guard attached to the velocity-restricting component at ground level which are substantially impermeable to vertical water flow to inhibit ditch scouring and prevent the flow of storm water under the ditch check system. To facilitate transportation, installation, and assembly, one or more of the components of the ditch check system can be supplied as a pre-assembled package.

A ditch check system and methods for storm water control are provided. The ditch check system can include a velocity-restricting component of non-woven geotextile fabric with one or more porosities configured to control the velocities of storm water flows for sediment control and silt retention. The velocity-restricting component can have one or more reinforcing elements to provide additional support to protect against tearing and/or undue movement of the fabric, as well as provide attachment points for fasteners used to fasten the fabric to support members. The ditch check system can further include a front water seal and a rear scour guard attached to the velocity-restricting component at ground level which are substantially impermeable to vertical water flow to inhibit ditch scouring and prevent the flow of storm water under the ditch check system. To facilitate transportation, installation, and assembly, one or more of the components of the ditch check system can be supplied as a pre-assembled package.

A modular precast concrete structure system to form a portion of a subsurface storage basin, the system including a concrete slab having a first edge and opposite second edge, and a first concrete side wall having an outer surface extending from the first edge substantially perpendicularly to the concrete slab, and a second concrete side wall having an outer surface extending from the second edge substantially perpendicularly to the concrete slab, the outer surfaces of the first and second concrete side walls being configured to be substantially parallel, each of the first and second side walls being configured with canted inner surfaces such that the first and second side walls taper in thickness away from the slab, and a plurality of footings each configured with a footing groove along an upper surface thereof, the footing grooves configured to receive a bottom edge of at least one of the first and second side walls therein.

A storm water retention or detention system is constructed to fit a desired land area from square shaped concrete modules. Each of the modules has at least one water passage and one air passage, and the water passages and air passages of adjacent concrete modules are in alignment to allow the free flow of water and air therebetween. The water passage may be circular, have a cross-sectional area less than 60% of the total area of a side of module, and be slightly above the bottom inside surface of the modules.

Structural cells and matrices using the structural cells for positioning below a hardscape that define a void space therein, the structural cells, matrices using the cells and methods of assembly allowing in one embodiment the introduction of a structural fluid such as concrete to provide an alternative structural cell and matrix product. In one embodiment a structural cell assembly is described comprising a structural cell with a plurality of legs integrally linked to a frame at a first frame end, the frame linking the legs together and the frame defining a generally flat plane with the legs extending substantially orthogonally away from the first frame end about the frame flat plane to a leg terminal end; and a separate plate engaging the legs, the separate plate comprising linked sockets, each socket engaging the leg terminal end; and/or linked sockets, each socket engaging the leg frame ends or a part thereof.