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

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A cohesive soil has an unconfined compressive strength of 1.8 tsf, but it was previously excavated and recompacted last year. How must a competent person classify it for OSHA sloping?

Type A, because strength exceeds 1.5 tsf Stable rock, because it stands when cut Not Type A; previously disturbed soil is classified no higher than Type B (or Type C if other Type C conditions exist) Type C automatically, because all New Mexico soils are Type C

Correct Answer:

Not Type A; previously disturbed soil is classified no higher than Type B (or Type C if other Type C conditions exist)

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