AL Pipelines Practice Questions - Alabama Pipelines Contractor Examination Exam

Why is a temporary sediment basin or trap used where a pipeline right-of-way crosses a long drainage swale?

It slows concentrated runoff so suspended sediment settles before the flow leaves the site It stores water for hydrostatic testing only It replaces the need for perimeter silt fence everywhere on the job It provides fill material for the trench backfill

Correct Answer:

It slows concentrated runoff so suspended sediment settles before the flow leaves the site

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