NM CID GF-9 Practice Questions - New Mexico CID GF-9 Utility Lines Contractor Examination Exam

In an NMDOT-style trench patch, what must be restored to specified density before the hot-mix surface is placed?

Only the top 1/2 inch of loose dust The trench backfill and the aggregate base (or equivalent treated base) to the thicknesses and densities in the standard drawing Nothing; HMA can be placed on loose native clay Only the polyethylene encasement

Correct Answer:

The trench backfill and the aggregate base (or equivalent treated base) to the thicknesses and densities in the standard drawing

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