Geotechnical, Structural & Civil engineering — Brisbane & Queensland
Levees & Weirs Guide
Levees, weirs and spillways protect land and control water. This guide explains embankment design, seepage control and the design and supervision of concrete hydraulic structures.
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Seepage, piping and erosion are the main reasons levees and weirs fail.
We design embankments and concrete structures together, with seepage and stability modelling, and supervise construction so the design is built as intended.
Comparison
An overview only. Every entry below is described cautiously and is not an engineering limit; suitability is always confirmed against site-specific data.
| Structures | Best suited to | Key consideration |
|---|---|---|
| Levees & flood embankments | Towns, farms and infrastructure in flood areas. | Crest level, slopes, core and erosion protection. |
| Weirs & spillways | River control and water storage. | Structural and uplift design with energy dissipation. |
| Small embankment dams | Farm and water-supply dams. | Core, filter and drainage design. |
| Seepage & stability analysis | All water-retaining structures. | Numerical seepage and slope stability modelling. |
Structures
Scope depends on flood levels, consequence and authority requirements.
Structure 01
Earth embankments for flood protection.
Towns, farms and infrastructure in flood areas.
Crest level, slopes, core and erosion protection.
Needs hydraulic flood levels.
Structure 02
Concrete weirs, spillways, stilling basins and gates.
River control and water storage.
Structural and uplift design with energy dissipation.
Hydraulic design input required.
Structure 03
Earthfill dams with cores and filters.
Farm and water-supply dams.
Core, filter and drainage design.
Referable dams need regulator approval.
Structure 04
Seepage, uplift and piping checks.
All water-retaining structures.
Numerical seepage and slope stability modelling.
Depends on reliable permeability data.
Selection considerations
These factors tend to narrow the options faster than any single test result. Every recommendation remains site-specific and subject to the available data.
Method
Scope is adjusted to the project, the risk and the information already available.