Skip navigation.

Concrete Drop Structure

siltbefore.jpg - 13533 Bytes
siltafter.jpg - 11580 Bytes


These structures are similar in design to gully head structures. Usually built as a free standing wall. Drop usually limited to 3 metres. Cost $20,000 plus.


Used to control active bed erosion. Often installed to protect an upstream asset such as a bridge or culvert.


Drop height is usually limited by channel capacity.

Requires rock bar or stable channel downstream to prevent undermining.

Forms a barrier to fish and other aquatic fauna.


Expensive to build because of difficult site conditions. Requires deep foundations into floor and banks to prevent failure.