Abstract: A stormwater treatment device includes a tank defining an internal volume and having an inlet and an outlet, a rotatable screen unit mounted within the tank, the rotatable screen unit being barrel-shaped to define a through path with an inlet end and an outlet end. The rotatable screen unit includes a screen structure with a plurality of screening openings for allowing passage of at least some water from the through path outwardly through the screen structure while inhibiting passage of trash items through the screen structure such that trash items move along the through path from the inlet end to the outlet end. The rotatable screen unit includes a plurality of external drive paddles that rotate with the screen structure and that interact with water that has been screened by passing outwardly through the screen structure interacts with the external drive paddles to cause rotation of the rotatable screen unit.

Abstract: A culvert system includes a flexible toe wall that connects to and extends down from the bottom of the culvert. The flexible toe wall is capable of readily conforming to various shapes of the trench conditions provided to receive the toe wall, before or as the trench is backfilled.

Abstract: A bridge system uses foundation structures that are formed of the combination of a metal-frame structure and cast-in-place concrete. The metal-frame structure of the foundation is capable of supporting bridge units before pouring of concrete.

Abstract: A separator unit includes a tank defining an internal volume and having an inlet and an outlet. An insert is provided within the tank, the insert including a down cylinder substantially centrally disposed within the tank and a baffle assembly at an external side of the down cylinder. The baffle assembly defines first and second inlet flumes for flowing incoming water from an external side of the down cylinder to an internal volume within the down cylinder. Inward ends of the first and second inlet flumes are positioned and oriented to create first and second vortex flows that progress downward within the internal volume, wherein a rotational direction of the first vortex flow is opposite a rotational direction of the second vortex flow in top plan view.

Abstract: A system for removing sediment from water is disclosed. The exemplary embodiments described herein disclose a system with a chamber having a deck positioned inside to divide it into an upper chamber and a lower chamber. The deck may have a plurality of holes to hold filtration elements and also may have a ridge or a skirt or both. The filtration elements may be filter cartridges with multiple elongated filter elements that extend down into the lower chamber.

Abstract: A corrugated plate structure includes a plurality of corrugated plates connected together to form a corrugated structure having a corrugation direction and a cross-corrugation direction. A reinforcement system includes: a first bracket and a second bracket, where the first bracket extends substantially parallel to the cross-corrugation direction and mounted to side-by-side first and second corrugation crests so as to pass over a corrugation valley that joins the first and second corrugation crest, and where the second bracket is spaced in the corrugation direction from the first bracket, and the second bracket extends substantially parallel to the cross-corrugation direction and mounted to the first and second corrugation crests so as to pass over the corrugation valley. An elongated reinforcing member extends substantially parallel to the corrugation direction and mounted to both the first bracket and the second bracket.

Abstract: A supported bridge including a prefabricated bridge including a deck and a plurality of girders. The deck is supported above the plurality of girders. The supported bridge further includes, a first and second abutment extending underneath the plurality girders in a direction transverse to the spanwise direction. The transverse abutments are mounted beneath the plurality of girders. The first steel abutment is located toward a first end of the prefabricated bridge and the second steel abutment is located toward a second end of the prefabricated bridge. Each abutment includes a beam and a bottom plate. The beam includes an upper flange, a lower flange, and a web connecting the upper flange and lower flange. The bottom plate is mounted on a bottom surface of the lower flange and has a width that is at least 1.5 times as great as a width of the lower flange.

Abstract: A splice component for tubular members includes a splice plate having a linear arrangement of spaced apart openings extending along a length of the splice plate, and a plurality of nuts aligned with the splice plate openings and loosely retained in place by a nut capture arrangement. The nut capture arrangement is formed at least in part by an elongated U-shaped cover plate having spaced apart side support legs on opposite sides of the linear arrangement openings, and a bridging part extending between the spaced apart side support legs and over the linear arrangement of openings. At least one elongated retaining plate extends between and is fixed to the spaced apart side support legs.

Abstract: A separator unit includes a tank defining an internal volume and having an inlet and an outlet. A deck within the tank separates the tank into an upper chamber and a lower chamber. A weir at an upper side of the deck defines an inlet side atop the deck for receiving an influent liquid and an outlet side atop the deck, with a first opening through the deck on the inlet side for delivering liquid down into the lower chamber, and a second opening through the deck on the outlet side for delivering liquid from the lower chamber back up into the upper chamber. The separator includes one or more of an integrated drop pipe assembly with a dispersal manifold, a riser pipe with a vortex disrupting vane and/or a weir configuration that in part follows a periphery of the second opening.

Abstract: A concrete culvert assembly includes multiple culvert units forming multiple side-by-side channels. One or more of the side-by-side channels have an interior side that is substantially vertical and an exterior side that is outwardly angled from top to bottom.

Abstract: A corrugated metal vent pipe includes a helically corrugated pipe structure formed by helical winding of a corrugated metal strip, wherein the helically corrugated pipe structure has a diameter of between 15 inches and 36 inches and a plurality of vent openings distributed thereon. A first pipe end treatment is located on a first end of the helically corrugated pipe structure, and a second pipe end treatment is located on a second end of the helically corrugated pipe structure.

Abstract: A separator unit includes a tank defining an internal volume and having an inlet and an outlet. An insert separates the tank into an upper chamber and a lower chamber. The insert includes a weir at an upper side to define an intake area for receiving an influent liquid, a first opening in the intake area for delivering liquid down into the lower chamber and a second opening on an opposite side of the weir for delivering liquid from the lower chamber back up into the upper chamber. The separator may include one or more of the first opening being of arcuate shape, a perforated shroud extending downward from the insert within the lower chamber and/or an upflow pipe extending downward from the second opening into the lower chamber, a bottom of the upflow pipe covered, and a slot opening in a sidewall of the upflow pipe.

Abstract: A system providing environmentally friendly pathway tunnel utilizes a bottom configuration with multiple elongated beams and slots. One or more of the beams includes upstanding sedimentation members that are spaced apart along a span of the tunnel. The system interacts with the flowing water and earthen material in the flowing water such that capture and settling of the earthen material at locations along the tunnel occurs to produce a more natural water flow pathway along the tunnel.

Abstract: A containment system including a wall member with a plurality of corrugations, each corrugation extending horizontally along a length of the wall member. Each of a multiplicity of the corrugations has openings therein, and at least some of the openings in the corrugations at least partially align to form an upright keyway through the wall member. The system further includes a bracket that has a plurality of corrugation-receiving spaces therein. The wall member is positioned with corrugations in respective corrugation-receiving spaces. The system also includes a locking member received in the upright keyway of the wall member and positioned such that interaction between the locking member and portions of the bracket prevent the wall member from being pulled away from the bracket.

Abstract: A bridge system is provided that utilizes foundation structures that are formed of the combination of precast and cast-in-place concrete. A method of constructing the combination precast and cast-in-place concrete foundation structures involves receiving at a construction site a precast concrete foundation unit having elongated upright wall members that define a channel therebetween, and multiple upright supports located within the channel; placing the precast concrete foundation unit at a desired use location; delivering concrete into the channel while the precast concrete foundation unit remains at the desired use location; and allowing the concrete to cure-in-place such that the elongated upright wall members are connected to the cured-in-place concrete by reinforcement embedded within both the cured-in-place concrete and the upright wall members. The bridge units may be placed before the pouring step to embed the bottoms of the bridge units in the cast-in-place concrete.

Abstract: A pipe joint includes a first pipe and a second pipe. The first pope has a first annular flange at one end, the first annular flange including a first end face. The second pipe has a second annular flange at one end, the second annular flange including a second end face. The first annular flange is mated to the second annular flange, with the first end face and the second end face facing each other and pressing at least one seal member therebetween. A plurality of axial retaining members are disposed around a perimeter of the mated first and second annular flanges to hold the pipe joint together.

Abstract: A system providing environmentally friendly pathway tunnel utilizes a bottom configuration with multiple elongated beams and slots. One or more of the beams includes upstanding sedimentation members that are spaced apart along a span of the tunnel. The system interacts with the flowing water and earthen material in the flowing water such that capture and settling of the earthen material at locations along the tunnel occurs to produce a more natural water flow pathway along the tunnel.

Abstract: A system providing environmentally friendly pathway tunnel utilizes bridge units having a bottom configuration with multiple elongated beams and slots. One or more of the beams includes upstanding sedimentation members that are spaced apart along a span of the tunnel. The system interacts with the flowing water and earthen material in the flowing water such that capture and settling of the earthen material at locations along the tunnel occurs to produce a more natural water flow pathway along the tunnel.

Abstract: A corrugated plate structure including a plurality of first rows of members, each first row including a first plurality of members connected end-to-end lengthwise. Each first row has members of variable widths along its length to define a first edge, and the first edge is similarly shaped for each first row. The corrugated plate structure further includes a plurality of second rows of members, each second row including a second plurality of members connected end-to-end lengthwise. Each second row has members of variable widths along its length to define a second edge, and the second edge is similarly shaped for each second row. The first edge and the second edge are complementary in shape, and the first rows and second rows are connected side-by-side along their first and second edges, where each member of the first row is interconnected with one member of the second row.