Surface Development Guideline 2 Potential subsidence risk non-active workings This guideline explains what home builders and property developers must do in relation to obtaining approval for their development. Surface Development Guideline 2 applies to all properties assessed to be at risk of damage due to trough subsidence. Listen Type: Guide Author: Subsidence Advisory NSW Publication Date: 21 July 2022 Tagged in Environment, land and water printPrint this page shareShare this page Facebook LinkedIn X Email mail