GUIDE TO THE APPLICATION OF THE REGULATION RESPECTING THE SUSTAINABLE DEVELOPMENT OF FORESTS IN THE DOMAIN OF THE STATE

Complete guide

Chapter V – Roads, sandpits and forest infrastructures
Division III – Bridge, culverts, removable structures and rudimentary structures
§4. General provisions applicable to bridges or culverts

Section 95

The embankments of a road that crosses a watercourse must be stabilized between the banks up to above the conduit or the arch, during the construction, improvement or repair of the road, with a geotextile membrane covered with riprap or a retaining wall.

1

Objectives

  • To preserve the integrity of an aquatic, wetland or riparian environment
  • To avoid carrying sediment into an aquatic, wetland or riparian environment
  • To ensure the lifespan of a road, bridge or culvert

Stabilization of the embankment of a road that crosses a watercourse

Figure 95A Stabilization of the embankment of a road that crosses a watercourse

The slope of the embankments located between the banks and above the conduit or the arch and the slope of the embankment located within 20 m of the watercourse, measured from the upper limit of the bank, must be reduced to a ration of 1 (V):1.5 (H) and the embankment must be stabilized using the usual techniques, such as those referred to in the second paragraph of section 73. The reduction of the slope is not required if the embankment is stabilized with a geotextile membrane covered with riprap or a retaining wall.

2

Objectives

  • To preserve the integrity of an aquatic, wetland or riparian environment
  • To avoid carrying sediment into an aquatic, wetland or riparian environment
  • To ensure the lifespan of a road, bridge or culvert

Additional information

The techniques indicated in section 73 are stabilization with vegetation, riprap and the construction of a retaining wall. A geotextile membrane must be placed under the riprap or retaining wall if there is a risk of bringing sediments into an aquatic or wetland environment.

Stabilization of the embankment of a road that crosses a watercourse

Figure 95A Stabilization of the embankment of a road that crosses a watercourse

Stabilization of embankments located 20 m or less from a watercourse

Figure 95B Stabilization of embankments located 20 m or less from a watercourse