NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage Or Flood Control Systems Contractor Examination Exam

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New fill for a raised levee will be placed against an existing steep earthen slope. Before building the new lifts, the existing slope should be:

Left untouched so the old slope remains a smooth slip plane Benched or keyed so new lifts bond into the existing fill and do not slide on the interface Saturated until it sloughs into the new fill Covered with polyethylene so the two fills never touch

Correct Answer:

Benched or keyed so new lifts bond into the existing fill and do not slide on the interface

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