Driveway drainage

bro'

Hi
I attach a pic of my drive which is currently hardcore gravel base on a slope of ~1:5 . Anyway due to lack of funds to do the finished surface and drainage I want to control water erosion from last few years where ~4" track channels were created with all the water from top of driveway flowing down it.
Until the finished driveway is done I am looking to re-grade the levels and compact it down with a twin vibratory roller using good compactable gravel_ 803 or 804?
Yet as the same erosion would happen again over time if did nothing, this time I wanted to install some sort of drainage however not sure what options are available since the eventual driveway surface finish will be 4'' higher than the existing level [e.g with concrete/asphalt?]
I was looking at linear drains and gullies where some already exist but higher than subbase level. Ideally I would like to do drainage now which would still work when finished drive in installed so think linear drains are ruled out?
Appreciate any input

sas

Not to appear unhelpful but are you sure those channels were caused by rain exclusively?

I'd suggest that vehicular access was responsible for at least some of it. My personal opinion is that it's responsbile for alot of it.

bro'

vehicle access compounds the situation and is as you say the main contributor however I believe it is due to both together that the subbase is eroded away not to mention the cold winters we had with salting etc for access. There is alot of water streaming down the drive in wet weather as area at top of driveway is ~250m2.

My thinking is that by controilling the drainage with this subbase finish it will extend the life of the gravel finish and there will be less erosion from vehicle access during wet weather etc [which we get alot off!]

PaleRider

Hi,
one thing i see is that you appear to have no cattle grid at end of your drive, this should be a condition of planning. You need to catch this water before it hits the road. This road, is it a national primary route? In any case you your not allowed to discharge water to any road.

The type of existing heavy fill is of poor quality, the long elongated face cannot hold finer material on top of it. Also the existing 804, would appear to be of poor quality. Try to source the stone from a quarry that supplies the co council.
I would recommend stone filled drains running along side the existing stone wall. These drains would be twin walled 100mm pvc pipe filled to road level with 50mm clean stone. You could introduce a camber(slope) to the driveway, to direct water to the drain layout.

bro'

thanks Palerider...will check that out