NM CID GF-3 Practice Questions - New Mexico CID GF-3 Canals, Reservoirs Or Irrigation Systems Contractor Examination Exam

A check dam in a temporary drainage swale on an irrigation-project site is used mainly to:

Increase flow velocity so the swale is self-cleaning Reduce channel velocity and trap coarse sediment Serve as a permanent canal drop structure Replace the SWPPP inspection requirement

Correct Answer:

Reduce channel velocity and trap coarse sediment

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