Dig all that out and put one of those concrete drain thingo’s in( sorry don’t know their actual name) which has a much wider drain section through the middle.
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I think you are referring to a culvert. Yes they are made in a range of profiles, however the root problem is is the water run-off from the driveway eroding the interface with the pipe rather than the water flow being affected by bank up within the pipe I think. To resolve this AB needs to generate a number of cross path diversions like we see in the high country to limit the accumulation of the water volume reporting to a single point, the interface with the pipe. This is a simple but PIA modification that will fix this as the only water that will reach with the interface will be from that collected between the last hump.
Nah this is my top driveway entrance.
My road has major problems and the council has put in three crossover pits and pipes up from my driveway to deal with immense water flowing down but living in the heavy bush they all block up in heavy falls and cascade over everything.
I literally pulled out 1/2m3 of sticks and leaves from my pipe entrance and my neighbour regularly excavates the crossover pipes up hill but it’s just almost impossible to stop.
The only thing that does work is a series of star pickets up hill to catch the debris as it comes down to keep the pipes clear which I’ve just done.
The good news is clearing this out killed me and I now have the green light from the minister of finance to get an excavator to maintain our property!
One happy camper now gents lol
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Well I misread that entirely! You have some work to do!