Abstract: A beaver controlling culvert attachment prevents beavers from disturbing the flow of water through a culvert. An upstream unit includes a vertical pipe having an upper grate, which prevents the entrance of beavers and debris, while allowing the entrance of water during periods of high water levels. A horizontal pipe has an upstream end attached to an upper portion of the vertical pipe and a downstream end attached to an upstream end of the culvert by an attachment plate. A basket insert is carried within the vertical pipe, and is movable between an in-use position, wherein a grate prevents entrance to the bottom of the vertical pipe, and a clean-out position wherein the grill is elevated to allow disposal of accumulated debris through the horizontal pipe and culvert. A downstream grate prevents beavers from entering the downstream end of the culvert, and from filling the culvert with debris.

Abstract: A plastic apron endwall is connected to a drain which extends under a highway. The apron endwall is in the form of an upwardly opening trough having a general wedge shape and incorporates lateral wings which extend outwardly from the sides of the apron end wall into the surrounding soil, so that as installed, the soil overburden prevents the apron end wall from being displaced upwardly by buoyancy forces in the event that the ditch into which the apron end wall drains becomes flooded. The total planar area of the wings is selected so that the overburden, that is the soil which lies above the wings, is sufficient to offset any buoyancy force produced by water saturated the soil in which the apron end wall is embedded.

Abstract: A storm-water control header for a culvert has a vertical head-wall with a thimble on the downstream side, and an adjustable inlet control device including a weir on the upstream side. The thimble is positioned within the culvert, and passes water from the weir to the culvert. A low flow section at the inlet control device allows water to pass from the bottom of the device at a low controlled rate to the culvert. A cover on the top of the control device excludes floating matter from the culvert.

Abstract: A culvert end guard for use in surrounding and protecting an exterior end portion of a culvert and which is assembled from first and second like half shell sections is disclosed. Each half shell is T-shaped in configuration and includes a central limb portion, two end limb portions, an exterior surface and an interior surface. The interior surface of each half shell is further characterized by an open-ended channel of predetermined size and shape that is centrally disposed in and which extends in a direction along the central limb portion, and contact areas located on either side of the channel. When the first and second half shell sections are brought together in opposed and closed shell relationship, they engage one another along their respective contact areas and form from their respective channels a passageway through which the end of the culvert can extend.

Abstract: A civil engineering structure having an arched wall including a plurality of curve shaped elements. Each element bears against one or more other similar elements and has a recess arranged in an outer face for casting a concrete assembly capping piece and reinforcements. Each element also includes at least one rigid bearing piece fastened to the element and has, at a free end of the rigid bearing piece, a surface with a non-planar profile. The rigid bearing piece comes to bear against a similar piece of another element located opposite it. The two rigid bearing pieces have complementary profiles making it possible for them to be wedged vertically.

Abstract: A culvert collar for providing a device that will support a culvert pipe and further reduces the installation time and maintenance time when working with culvert pipes. The inventive device includes a two piece flange assembly that has a first member that has a plurality of tongue portions and a second member with tongue grooves. The first member is placed in position in the trench and the culvert pipe is seated in a semi-circular channel of the first member. The second member is placed over the culvert pipe and held in position by the coupling of the tongues portions with the tongue grooves.

Abstract: An overfilled arch structure includes a spandrel wall that is formed of a plurality of separate segments, each of which is monolithic. The arch structure includes an arch end element having a curb thereon at one end edge, and the segments of the spandrel wall each have a front face that is in abutting contact with the curb and a rear face that is exposed to earth backfill. Vertical support for the segments is provided by the arch end element and the foundation and horizontal support is provided by the curb and the wingwalls. Stabilization is provided by the earth backfill. The lateral segments of the spandrel walls are mirror images of each other and can be formed in a single form. A joining spandrel segment is identical to two lateral segments in edge-to-edge relationship and is used for side-by-side structures. A central segment, like the lateral segments, has at least one arcuate side for snugly abut against the arch element, and can have two arcuate sides.

Abstract: The invention concerns a method for absorbing organic, ecologically stressed pollutants (1) such as oil, tar and phenols on grounds (12), rubble or solid disposal site surfaces which are floating on or in waters of a disposal site with liquid and/or sludge phases and/or solid sediments. This object is achieved in that in the invention fly ash (3) and/or cement-activated fly ash of large surface and evincing the structure of a hollow sphere, especially fly ash from lignite-powder fired boilers, is brought into contact with the pollutant, in that fly ash and pollutant are activated with water (5), being mixed into a pollutant-immobilized mixture (6) and being used in consolidating manner.

Abstract: A box culvert formed from a plurality of corrugated sections. Reinforcing ribs are secured to the outside surface of the culvert. A universal receiving channel is provided for each lower edge of the culvert and may be used to secure lower edge portions extending at different angles relative to horizontal. A rib configuration is disclosed which results in manufacturing and material savings.

Abstract: A precast concrete soil retaining structure is provided comprising an upright portion, a base portion, and a plurality of retaining caps. Preferably its use will be as a wingwall for use with culvert systems. The upright portion of the structure has a first face and a second face, as well as a first end and a second end. The first end is of a height greater than or equal to the height of the second end. The base portion has a top surface and a bottom surface and a plurality of channels of a first diameter, each of which extends between the top surface and the bottom surface. Each of the retaining caps has a channel of a second diameter extending therethrough, with the second diameter preferably being less than that of the first diameter. Each of the retaining caps is positioned above a respective one of the base portion channels.

Abstract: A drain module is substituted for a retaining block during the construction of a retaining wall of interlocking retaining blocks to provide a drain. The drain module includes an inlet tube for coupling to a drainage pipe, a flange having an outer face attached to an end of the inlet tube, and an elongated main tube aligned with the inlet tube and attached to an inner face of the flange. A front face plate is attached to a front end of the main tube and has an opening aligned with a passage through the main tube. First and second side chambers are bounded by first and second portions, respectively, of the front face place extending beyond opposite sides of the main tube. In one embodiment the side chambers are filled with cement or the like during construction of the retaining wall to receive and anchor interlocking pins engaging retaining blocks of the retaining wall. The front face plate has a shape or contour closely corresponding to the shape or contour of the front face of each retaining block.

Abstract: A precast concrete culvert system includes a series of open bottom culvert sections each having parallel spaced vertical side walls integrally connected to an arcuate top wall having a curved inner surface with a radius of curvature at least twice the rise defined between the top center of the curved inner surface and the bottom surfaces of the side walls. The side walls rest on footers and have outer surfaces which form sharp corners with the top surface of the top wall and have a vertical height at least sixty percent and preferably between eighty and ninety percent of the rise. The vertical height is also less than fifty percent of the radius of curvature which is between twenty and fifty feet and preferably either about twenty-five or forty feet.

Abstract: A precast concrete culvert system includes a series of open bottom culvert sections each having parallel spaced vertical side walls integrally connected to an arcuate top wall having a curved inner surface with a radius of curvature at least twice the rise defined between the top center of the curved inner surface and the bottom surfaces of the side walls. The side walls rest on footers and have outer surfaces which form sharp corners with the top surface of the top wall and have a vertical height at least sixty percent and preferably between eighty and ninety percent of the rise. The vertical height is also less than fifty percent of the radius of curvature which is between twenty and fifty feet and preferably either about twenty-five or forty feet. The end sections have vertical head walls, and the vertical side walls are adapted to connect with angularly disposed vertical concrete wing walls to provide for a smooth hydraulic flow into and through the series of the culvert sections.

Abstract: A shell-like retainer structure is provided for forming headwalls at each extremity of a culvert disposed below a driveway. The retainer structure has two parallel spaced apart sidewalls having aligned U-shaped openings, and a transverse wall spanning the perimeters of said side walls, said side and transverse walls defining a chamber which opens at the bottom of the retainer structure and at the U-shaped openings. A filling aperture is located in the uppermost extremity of the transverse wall. When the retainer structure is seated upon the culvert, filling material is poured through the aperture, and the filled structure is left in place upon the culvert.

Abstract: A removable culvert grate for placement adjacent the inflow end of a culvert. The grate includes a vertical grate having a plurality of slats to prevent the flow of beaver workings or similar debris therethrough, and a horizontal platform extending outwardly from the lower edge of the vertical platform. A linkage bar is provided extending from the upper edge of the vertical grate for connection to a power source such as a winch. The grate may be placed adjacent the inflow of a culvert, and, after beavers have constructed a dam or similar debris has collected against the vertical grate, the unit may be lifted by a winch carried in a pick-up truck or similar vehicle, carrying with it the debris.

Abstract: A culvert section includes vertical parallel spaced concrete side walls integrally connected by an arcuate concrete top wall having a curved inner surface with a radius of curvature at least twice the rise defined between the top center of the curved inner surface and the bottom surfaces of the side walls. The side walls have flat outer surfaces which form corners with the top surface and have a vertical height preferably between eighty and ninety percent of the rise. The vertical height is also less than fifty percent of the radius of curvature which is between twenty and thirty feet and preferably about twenty-five feet. The vertical side walls are adapted to connect with angularly disposed vertical concrete wing walls to provide for a smooth hydraulic flow into and through a series of the culvert sections.

Abstract: A culvert section includes vertical parallel spaced concrete side walls integrally connected by an arcuate concrete top wall having a curved inner surface with a radius of curvature at least twice the rise defined between the top center of the curved inner surface and the bottom surfaces of the side walls. The side walls have flat outer surfaces which form corners with the top surface and have a vertical height preferably between eighty and ninety percent of the rise. The vertical height is also less than fifty percent of the radius of curvature which is between twenty and thirty feet and preferably about twenty-five feet. The vertical side walls are adapted to connect with angularly disposed vertical concrete wing walls to provide for a smooth hydraulic flow into and through a series of the culvert sections.

Abstract: A three-sided, rectilinear bridge or culvert structure comprises a pair of vertical sidewalls set in preformed or cast in place footers or existing supports and an integral, planar, horizontal span. The footers preferably include a sidewall receiving channel on their upper surfaces. There is no lower or bottom portion of the structure such as is found in conventional box culverts and thus, that region between the footers and sidewalls is open and readily permits water flow through the structure in its natural watercourse, lessening the likelihood of debris collection within the structure. The structure is cast concrete reinforced with conventional reinforcing bar or welded wire mesh. A wide range of rise/span (height/width) proportions may be accommodated in structures having spans up to about thirty feet.

Abstract: An end element (10) retains earth overfill (E) associated to an overfilled load support structure (L) which includes an end arch element (S). The end element replaces a spandrel wall (R) and wingwalls (W), and includes a lateral extension (12) located next to the end arch element of the load support structure and which extends far enough so the slope of the fill between an overpass (O) and the toe (22) of the fill located on top of the support structure is low for permitting the overfill located on top of the load support structure to be essentially unrestrained in the horizontal direction. Retaining panels (14) are located adjacent to the lateral extension and cooperate with that lateral extension for retaining the fill.