102. During the construction, improvement or repair of a road, a culvert may not have more than 2 parallel conduits. The conduits may be of different diameters provided that, according to Schedule 8, their diameters vary only by one class of diameter and provided that the total minimum discharge capacity determined according to the method of calculation of the peak flow for drainage basins provided for in Schedule 6 or 7, as the case may be, is met.
The minimum distance between the conduits is 1 m.
A device for guiding debris must be installed upstream from a culvert with parallel conduits.