Installing storm drain below public road

[Kevan Marshall]

Hi,

On the plot I have bought we have flooding issues with water running off the farmers field at the rear, through the sight and running across single track public road then going into field in opposite side of the road, I plan to install storm channel at rear of site and pipe to front of site, I was going to pipe into two small stone culverts that go under the road but they are connected to neighbours sewage outlets and may cause issues during heavy rain, I want to install my own pipe below the road and into the field opposite into the ditch, the farmer is ok with this, has anyone ever installed an 8” or 10” pipe using horizontal auger boring and how expensive was it, to dig up the road and install a culvert would be a nightmare by the sounds of it, any advice would be very much appreciated!

Kev.

Edited 7 hours ago by Kevan Marshall

[Kevan Marshall]

[Kevan Marshall]

[Nestor]

Similar issues here on local lanes, 

Permissions and cost will be challenging going under the road.

A bit crude but a trench excavated next to and under the hedge, large diameter pipe then fitted. That is 150mm diameter pipe in the photo.

Only needs to be below the lowest point of the lane.

Does get clogged up a few time a year which creates 50 metres of standing water, then cleared within a day.

 

[ProDave]

It took nearly 20 years of complaining to the council that our road floods every winter with water running off a field, across the road then down between 2 houses and into the burn.  Eventually last year they came and installed a shallow culvert under the road.  It still runs off the field and still discharge between the 2 houses and runs down to the burn, but now it travels under the road to do so.

 

We all believe there was already a culvert there that had become blocked, but nobody would investigate that or even dig a hole to see if there was any form of existing culvert.

 

If you are wanting to install a new pipe under the road by molling under the road, you still need a road opening permit from the council and it still needs to be done by a contractor holding a minor streetwork permit.

[Kevan Marshall]

47 minutes ago, Nestor said:

Similar issues here on local lanes, 

Permissions and cost will be challenging going under the road.

A bit crude but a trench excavated next to and under the hedge, large diameter pipe then fitted. That is 150mm diameter pipe in the photo.

Only needs to be below the lowest point of the lane.

Does get clogged up a few time a year which creates 50 metres of standing water, then cleared within a day.

 

Unfortunately there is no easy solution, I need to ensure no storm water is running through over my site, I cannot put any form of bank or wall at rear of the site as this shall divert storm water through my neighbours garden, this was highlighted with objecections from both neighbours at planning stage, planning was granted as I said I would resolve this issue, no objections from the environmental agency as they said it was not on a flood plain, I need this resolved once and for all so I never have issues in the future, at the rear of plot I am installing a storm channel with flag stones on top with a 2cm gap between them and galvanised storm grating at lowest point, then run an 8”/10” drain through the sight and under the road to the field across the road, I could tie the drain to be installed through my site into two small 4” sewage pipes from both neighbours but during heavy rain this may create issues with sewage backing up, I also do not want to finish my house and landscaping then have to dig things up again due to trying to cut corners at this stage

[Oz07]

What if you go the route with the neighbours drain or culvert but fit non return valves to their pipes?

[Kevan Marshall]

13 minutes ago, Oz07 said:

What if you go the route with the neighbours drain or culvert but fit non return valves to their pipes?

That would be an option but the two culverts are 10 meters left an right from the sides of my plot, when I looked at the stone culverts one was collapsed below the road and the other is really only suitable for septic tank run off, when my site floods it really floods, it never used to happen but now it floods badly two or three times in the winter

[saveasteading]

Augering I don't think is viable as it would be complex and somehow avoid the road subsiding.. Even if it was, you would need a very big pit both sides to be deep below the road.

 

Road closure and a council approved contractor for a pipe,  I'd say £5,000. More if it needs traffic lights. Plus any permissions coats.

 

Can you dig a big trench or lagoon?

 

 

[Conor]

Open cut and reinstatement will be the fastest and cheapest option. Ask around for a contractor that can do this. Biggest hurdle will be road opening license and utility searches / tracing / trial holes etc.  the work itself is less than a day for a small crew.

 

I've a mate that does this sort of work, based in Dundrum and works all over Co. Down, Armagh and Antrim. He's usually super busy and hard to get hold of tho! Esp now as he'll be maxed out doing pothole work.

Edited 11 minutes ago by Conor