Cutoff trench | Article about cutoff trench by The Free Dictionary
cutoff trench[′kət‚ȯf ‚trench]
A trench which is below the foundation base line of a dam or other structure and is filled with an impervious material, such as clay or concrete, to form a watertight barrier.
References in periodicals archive
4 million square foot slurry cutoff wall and an approximate 2,600 foot long open-cut cutoff trench
through the foundation of the upstream tow of the Twin Buttes Dam to reduce foundation seepage.
2 miles long and 90 feet tall at its highest point with a soil bentonite cutoff trench
in the foundation and the upstream face of the dam protected by soil cement.
Including earth work, piddle trench, cutoff trench
, puddle filling, filter and rock toe, pitching and construction of spill channel, earth work from r.