"When you are moving lots of earth and rock for a large-scale road project, it can be difficult to gauge the impact on sedimentation and erosion," he said.
(you; are moving; lots of earth and rock) (When you are moving lots of earth and rock for a large-scale road project, it can be difficult to gauge the impact on sedimentation and erosion; said; he)
you When you are moving lots of earth and rock for a large-scale road project, it can be difficult to gauge the impact on sedimentation and erosion
are moving said
lots of earth and rock
he