Revised Final Environmental Study Report (24 MB) - Gold Canyon ...

Springpole_GenericSedInstall_____________________________________________________10July2013
6. Fill slopes are to be no steeper than 2H:1V and good quality rip rap material is to be
placed around the pipe ends to protect the fill from erosion.
7. In the spring, when the frost is out of the ground, the pipe is to be inspected by a
competent person familiar with MNR requirements. Significant settlement of the road
fill beside the pipe or distortion of the pipe out of round by more than 10 percent is
cause for concern. If either condition is observed, the backfill is to be removed to water
level for a distance of 3 metres on each side of the pipe and replaced in the normal
manner, with compaction. Any sources of erosion that will cause sediment to enter the
creek are to be treated to meet requirements of the work permit.
8. The coupler can often be a weak link in culvert installations. If possible, a one piece
culvert should be used as opposed to one that requires coupling (i.e. 1 x 18m vs. 3 x 6
m).
9. Snow cover can easily make one forgetful of the importance of constructing measures
to control runoff water to prevent sediment. Attention must be paid to good diversion
berms or off shoot ditches into the standing timber.
10. Any potential settling of the culvert will usually be concentrated under the load of
the backfill. Consequently, the ends of the culvert could have a tendency to "float up".
The culvert ends should be weighted with cobble to promote even settling if any settling
should occur. This material can be pulled back after spring thaw.
11. A few loads of good backfill material placed handy to site will rarely go to waste. A
stockpile will reduce the need for full mobilization of a construction crew if a deficiency
is detected. If the stockpile is not needed for the crossing, it can be utilized to fix a soft
spot on the road.
RBA1996 02 20
Source: MNR Water Crossing Work Shop Material North East Region
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