Overview

Precon’s Check/Drop Structure is a multi-piece (typically using 9-13 pieces) precast concrete structure that assembles together in the shape of an ‘H’ and is installed in an irrigation canal perpendicular to the flow of water. The shape of the structure creates a double water cut-off, ensuring that water cannot get around or under the structure, helping prevent bank erosion.

The Check/Drop Structure is engineered and designed to USBR standards and is a reliable solution for water flow control in a water conveyance system, where there is also a change in elevation. The Check/Drop Structure allows the designer to control water levels and water velocity, which works well in conjunction with Precon’s Inlet/Turnout as a way to obtain necessary water levels for water delivery.

The structure is designed for canals with flows as large as 3.0 cubic metres per second. We take into account the width of the canal at the top and bottom, the flow of water, and the type of gate when designing the structure. The structure can accommodate Overshot, Stop Log Systems and several other popular gate systems. The Check/Drop Structure can also be used to measure the flow of the water.

Uses

1. Level and grade control in the storage, deliver and drainage of water systems where there is a change in elevation

2. Weir Structure

3. Check/Drop Structure

4. Drop Structure

Sizes

Precon Inlet/Turnout sizes are based on the slope of the canal or pond and the size of the conveyance pipe. Precon can accommodate slopes of 2:1, 2.5:1 and 3:1.