Abstract: An elongate barrier comprising an elongate apertured load-bearing sheet material and an elongate apertured filter material attached to the load-bearing sheet material. The length of the filter material can be changed elastically so that the barrier material can be transported in the form of a roll which can be unrolled for installation.

Abstract: A control device which, when it is installed as part of a fence, allows a small animal to pass from a first side of the fence to the other side of the fence, but prevents an animal which has passed through the device from returning to the first side of the fence. The control device can comprise (1) a mouth which (i) is exposed on the first side of the fence and (ii) has an open cross-section, and (2) an extending passage which extends away from the mouth to an exit. The extending passage can narrow as it extends from the mouth to the exit.

Abstract: A protected drain assembly comprising a drain which is at least partially bordered by a hard surface, and which is protected by a drain cover assembly which comprises (A) a laminar sheet which (i) is on top of the drain and (ii) comprises a central portion which, when a sediment-containing liquid is placed on top of it, allows the liquid to pass through it, and (B) gaskets which (i) are attached to edges of the laminar sheet and (ii) secure the edges of the laminar sheet to the hard surface.

Abstract: A protected drain assembly comprising a drain which is at least partially bordered by a hard surface, and which is protected by a drain cover assembly which comprises (A) a polymeric sheet which (i) is on top of the drain and (ii) (a) is substantially impervious to water or (b) comprises a central portion which, when a sediment-containing liquid is placed on top of it, allows the liquid to pass through it, and (B) gaskets which (i) are attached to edges of the polymeric sheet and (ii) secure the edges of the polymeric sheet to the hard surface.

Abstract: An elongate barrier material comprising an elongate apertured load-bearing sheet material and an elongate apertured filter material attached to the load-bearing sheet material. The apertures in the filter material have an ASTM D-4751 size less than 500? and the size of the apertures in the load-bearing material is at least 4 times the size of the apertures in the filter material. The length of the filter material can be changed elastically so that the barrier material can be transported in the form of a roll which can be unrolled for installation.

Abstract: Assemblies and methods for securing an elongate apertured fence to the ground. The fence includes an upper section which is apertured and which extends upwards from the ground, and a lower section which may or may not be apertured and which is not buried in the ground. The lower section is contacted by a footing member which is secured to the ground and which stabilizes the fence along a desired line along the ground. In some embodiments, the lower fence section is parallel to the ground, and at least part of the footing member lies between the lower fence section and the ground.

Abstract: Sediment control devices (SCDs) include an apertured threshold member and an apertured outflow member, and optionally a filter member between the threshold and outflow members. In some SCDs1 the outflow member has a smaller aperture size than the threshold member, or vice versa. In some SCDs, a filter is placed in front of the threshold member. In some SCDs, there is a substantially hollow sediment control chamber (SCC) between the threshold and outflow members; in others, there is little or no hollow space between the threshold and outflow members. The SCDs can be constructed so that they are resistant to damage by wheeled traffic. The SCDs can be used to control sediment in run-off from a construction site, as drain covers, or as retaining members for lawns or planting areas. A number of SCDs can be joined together to form assemblies which are useful for stabilizing a land mass, for example a gully or river bank.

Abstract: Sediment collection devices (SCDs) which can be used to collect sediment from sediment-bearing liquid, for example runoff from construction sites, and which have improved durability, particularly when wheeled vehicles pass over them. The SCDs include a horizontal location member; and a generally vertical member comprising (1) a filter which has relatively small apertures therethrough, and (2) threshold and outflow members each of which have relatively large apertures therethrough and which together provide a sediment control chamber (SCC) between them. The height of the SCC is at least 1.5 times its width; and/or the SCC is shaped so that a vehicle wheel approaching the SCD contacts the SCD at a defined height and angle; and/or one or both of the threshold member and the outflow member has a bending or stiffening line such that different parts of the SCD respond differently to bending forces. Precursors and methods for making such SCDs are described.

Abstract: A sediment control roll includes a threshold member having large apertures therethrough, a hollow sediment collection chamber, and an outflow filter having small apertures therethrough. The sediment control roll can be used to collect sediment in runoff from a construction site, or to reduce removal of sediment from an existing land mass. The sediment control roll can for example be made by rolling up extruded polymeric netting with filter cloth attached thereto.

Abstract: A drain inlet cover for a drain in a road which is bordered by a sidewalk and separated from the sidewalk by a curb, with access to the drain through an opening in the curb. The cover includes a horizontal section which lies on the road and a vertical section which covers the opening in the curb. Each section includes a filter member which lies between two apertured polymeric members.