§ 33.26. Protection around quarry openings.
(a) Substantial fences, berms, walls or cribbings shall be constructed around the openings of deep pits or slate quarries to prevent wash and slides from falling into the quarry. The devices shall be constructed at such points where workmen are in danger from slides or falls.
(b) The over burden of clay or shale shall be terraced at the top for a distance of not less than ten feet back from the edge at all points where a fence, berm, wall, or cribbing is required. The angle of the terrace shall not be greater than 45 degrees.
(c) For all side hill quarries the over burden shall be removed for a distance of at least 15 feet from the face of the quarry.
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