Dadnatron
Veteran Member
I just put in 3 culverts last fall. I dug correct depth to allow for a 2-3" bed. I laid in the culvert and my son and I tamped it with small lifts setting the bottom. We continued to add, tamp, add, tamp using crusher run and dirt. After the top was covered and about 4" covered and packed, I filled the rest , packing with the tractor wheel. I mounded about 6" over the top and have been driving over it all winter. You can see how it has slowly settled, but very minimally. Looking inside shows no crushing.
You can tell, however, which culvert we did first and last. The first has a tall hump remaining in place and the last has about 1/2 the size. Although both humps were approximately the same height when finished. I suspect it is because we tired as we went and compacted less well on the 3rd.
You can tell, however, which culvert we did first and last. The first has a tall hump remaining in place and the last has about 1/2 the size. Although both humps were approximately the same height when finished. I suspect it is because we tired as we went and compacted less well on the 3rd.