Reclaiming ground / piping gripe/shough

No problem piping it as long as the water from the road is still able to get away and not flood a) the road or b) the land where it previously wouldn't have flooded.

Put in a big enough pipe and plenty of stone around it. Ya might need to pipe in any runoff drains into the new pipe too

I don't know the specs of those pipes. Ya'd need to at least match the existing pipe in terms of size so as the new pipe isn't or can't become a bottleneck. Ya'd be able to join them together alright.

Corri won't match to a concrete pipe

I think once they are backfilled correctly the jfc one will carry 40tn

There are other brands as well so you'd need to check...polypipe, cherry pipe etc

Would a perforated 18" pipe do the job once backfilled with stone, you'd be covered from overhead water then as well

Measure the diameter of the conc pipe, if its a 12/15 or 18" get a corri pipe collar of the same size & see will it slip over it

Ask any good digger driver they'll guide you

Alternatively if your current pipe is say 12" fit a 15" corri over it and away you go

They are good value up to 12" but above that size the price rockets up

Good to hear, whatever you can get perforated you can also get in solid form

What rushes said re surface water is correct the more I think of it

Maybe run a 6" perforated/land drainage pipe at the top & into manhole

I'd put in a manhole to have access to free it at a later stage, esp with silt etc build up

Let us know how you get on