86. Every person authorized to build or improve a road crossing a watercourse must ensure that the bridges, culverts or removable structures that are part of the road allow the free flow of the water. The foregoing also applies to a person who repairs a road crossing a watercourse.
Bridges, culverts and removable structures must prevent the contact of vehicles with the water and the bed of the watercourse and the carrying of sediments into the aquatic environment.
Bridges, culverts and removable structures must be stabilized as soon as possible during the work to prevent any possible risk of erosion.