Construction workers installing underground piping in a trench with gravel foundation, using ladders and pipes.

Sewer

A narrow trench with orange sandy soil and a gravel bottom, containing light green PVC pipes and an open white bucket, with dirt walls and an orange and white level tool on the ground.
A bulldozer and an excavator working together at a construction site with dirt and rocks, under a blue sky with some clouds.
Interior view of a green pipe with a top of a laser measurement device showing measurements in inches and millimeters, resting on the bottom.