# Breach Depressions
‘Breach Depressions’ allows you to break through a depression and allow water to flow out.
- ’Layer to breach’ selects which surface layer the breaching should be applied to.
- ‘Transparency’ of the design can be altered using the slider.
- ‘Output new surface’ will create a new design layer.
- ‘Modify existing surface’ will make breaching changes to the selected surface.
- ‘Create breach paths as polylines on close’ by selecting this option polylines will be generated according to the ‘Min path length’.