A-18.1, r. 7 - Regulation respecting standards of forest management for forests in the domain of the State

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28. Every person installing a culvert with a bottom in a watercourse or a fish habitat shall ensure that the culvert is installed following the slope of the bed of the watercourse and that the inner wall of its base is located below the natural bed of the watercourse at a depth equivalent to 10% of the culvert’s height, except in locations where the conditions of the soil make it impossible to install it at such a depth.
O.C. 498-96, s. 28.