10. No work carried out in wetlands and bodies of water may include excavation or backfilling.
The provisions of the first paragraph do not apply to work whose nature necessarily entails excavation and backfilling, such as road construction or maintenance, burial or anchoring of certain equipment, or construction of a building.
Excavation and backfilling resulting from work covered by the second paragraph may give rise to temporary encroachments in wetlands and bodies of water if the work is carried out in the right-of-way of the undertaking or in the immediate work zone.
At the end of any intervention, spoil and excess materials must be disposed of outside of wetlands and bodies of water and managed so as to forestall runoff from sediment toward those areas, except for drilling mud, which may be left in an unwatered wetland, and any other spoil and materials covered by a contrary provision of this Regulation.