When an embankment to a lake, reservoir, canal bank or mill stream is leaking it is necessary to introduce a waterproof barrier to prevent water movement. Leaks will occur where there are problems with the original construction, poor compaction or insufficient clay, or where there have been animals burrowing in the bank or because of tree roots.
The most reliable method of repair is to excavate the dam in the area of the leak and batter back the sides of the repair at a slope of 1:6.
The area is then rebuilt using fill with a suitable clay content, rolled and compacted in layers back to the surface. The dam will then be as good as, or better than new.
However, because of time, space, technical or financial constraints it may be decided to use other techniques:
Other techniques that may be used are concrete secant piles or slurry cut off walls.
For more information or to discuss your particular requirements call Chris Keech on 01460 279200.