caterpillar bulldozer at a sand quarry site

body bricklaying bulldozer caterpillar chain civil construction creek development digging drainage durable earth earthwork egypt element engineering environment equipment excavation excavator extraction factory geology heavy hydraulics industrial industrialization industry landscape landscaped landscaping large layer layered machine machinery maintenance material mineral mining mixture mover nationwide natural nature outdoor paving people pile planet production quality quarry removing resources sand sandpit sandy sharp site soil stability stack stream strength suppliers supply technology testing variation vehicle viewpoint water