Well, Ain't this something
Worked on the clogged culvert again today. All the fancy scoops and augers in the world wouldn't have done squat!
The pipe is ovaled at a high spot about 9 feet in fromn the up hill end.
With lots of stroking a length of rebar in and out while running hose volume/ pressure full bore. I was able to move nearly all the gravel over the hump.
Sighting from the low end, with my eye at the very top of the culvert bore, I could just see a crescent of light from the far uphill end.
The high spot is just about one culvert diameter above the opening.
No chance of working!
Plus, the culvert is ovaled as determined by how a simple L bend in the rebar went through the bore. Lateral position was OK, vertical orientation was a no go!
I'll need to dig the pipe up and lift the high end a bit higher. There is room as far as the road way grade and lay of the land goes. Not sure about the integrity of the culvert however. My luck, there is a seam of ledge right at that kink!
OH! I tried to wash a string down through the pipe with the water stream. All I ended up with was a ball of knots as the water level was nearly half way up the opening and not enough flow was going over the rise to establish a flow. The swirl sure did a job on that line.
I wished I had a mouse to tie a string to it's hind leg and send it through ;-)
Pick and shovel work to inspect the trouble spot, then a few bucket cuts into hard packed roadway should allow the culvert to be lifted.
Some additional road gravel will be needed.
The joys of rural living ;-)