What is engineered fill?
'Fill' is a material that is used to fill in a depression or hole in the ground, or create mounds or otherwise artificially change the elevation of the ground. These may include earthworks such as infill, raising or levelling ground, embankments, foundation pads, road bases and landscaping. Fill may be engineered or non-engineered.

Engineered fill is selected, placed and compacted to an appropriate specification in order that it will exhibit the required engineering behaviour.

Non-engineered fill usually involves the disposal of waste materials. Normally such fill would occur on sites where uncontrolled filling has taken place and therefore no reliance can be placed on the type of fill material and method of placement.