Abstract: Generally, a linear position monitor including a rotatable member having a toothed periphery configured to directly rotatably engage a longitudinal linear portion of a spiral thread coupled to an elongate member whereby an amount of linear travel of the elongate member directly reversibly rotatably drives the rotatable member operationally coupled to a linear position indicator calibrated to translate rotation of the rotatable member about the rotation axis into an elongate member location value corresponding to a location of the elongate member in the amount of linear travel.

Abstract: A slide gate having a frame assembly including an intermediate cross member coupled between a first and second gate guide members defining a corresponding pair of side channel elements each containing an elongate side seal which abut opposed ends of an elongate top seal secured to the intermediate cross member to seal a gate slidely engaged in the pair of side channel elements.

Abstract: A fluid flow conditioning conduit for a fluid flow control gate which generates a conditioned fluid flow coupled to a flow meter which measures the velocity of the conditioned fluid flow allowing calculation of the volume of the conditioned fluid flow.

Abstract: A method and apparatus for controlling an upstream water level by adjusting the elevation of a trough assembly of a weir. The weir is a open frame within which is slidably mounted a trough assembly, which may be raised or lowered by means of a tandem screw jack assembly, which caps the open frame. The perimeter of the open frame is lined with a continuous J-shaped neoprene seal, which provides a smooth slidable surface for movement of the trough assembly. The J-shaped seal also provides a substantially water tight barrier between the trough assembly and the open frame. Two vertical screw shafts extend downwardly from the tandem screw jack assembly and are bolted to the trough assembly. By rotating a hand crank, the vertical screw shafts raise or lower the trough assembly.