Road drainage

walkingshadow

Hi- got a FI letter regarding a planning application asking "details of how the verge drainage (i.e. at the edge of the public road) will be permanently preserved across the site entrance"

What does this mean? My engineer can't even satisfy me!

delfagio

Hi walkingshadow,

I may not be 100% correct on this, other's can correct me if I'm wrong, but my understanding of what your FI is looking for is basically how you will maintain the road drainage along the verge at the front of your site.

Is there currently an open drainage Ditch along the road at the front of your site which any rain water or running surface water drains into?

Usually the County Council will require the existing road drainage system be maintained, so if there is an open drainage ditch along the road, you may have to leave this in place but just level off the bank so it is approximately 200mm above road level in order to maintain sight distances from the drive entrance.

Also you will more than likely be required to pipe the entrance into the site with possibly 225 or 300mm pipe to maintain any drainage in the open ditch.

A report they may be looking for would be to show how any road drainage along the road frontage of your site will be maintained.

Hope this is of help and if I am wrong maybe other people could help also.

walkingshadow

This is a picture of the road entrance (its an existing entrance-retention is sought) They asked to install a drainage grill, which we will, but as regards "details of how the verge drainage will be permanently preserved across the site entrance" I can't see what they mean, or what affect the site has on it

http://imagizer.imageshack.us/a/img537/6108/o6cD8a.jpg

arthur daly

Your entrance looks to be on a slope so I'm guessing that want it to catch any water from you property.

arthur daly

Your entrance looks to be on a slope so I'm guessing that want it to catch any water from you property.

walkingshadow

Surely the drainage channel is the answer to their concern about maintaining the road verge?

Rabbo

There can be a flow of water along a road verge in very wet weather. It's fairly common for a council to condition that a drainage pipe(usually 300mm) be installed under an entrance so that there can be through-flow of water along the verge. This should be done in addition to the installation of a drainage grid which stops water flowing from your access road onto public road.

walkingshadow

Rabbo wrote: »

There can be a flow of water along a road verge in very wet weather. It's fairly common for a council to condition that a drainage pipe(usually 300mm) be installed under an entrance so that there can be through-flow of water along the verge. This should be done in addition to the installation of a drainage grid which stops water flowing from your access road onto public road.

Any examples/ pictures of one of these?

BryanF

walkingshadow wrote: »

Any examples/ pictures of one of these?

That's what your eng is for. I find it hard to believe s/he can't deal with this on your behalf.

walkingshadow

BryanF wrote: »

That's what your eng is for. I find it hard to believe s/he can't deal with this on your behalf.

God, all I was looking for was an example

walkingshadow

Rabbo wrote: »

There can be a flow of water along a road verge in very wet weather. It's fairly common for a council to condition that a drainage pipe(usually 300mm) be installed under an entrance so that there can be through-flow of water along the verge. This should be done in addition to the installation of a drainage grid which stops water flowing from your access road onto public road.

But even if a pipe was there, the verge has no drain- a 300mm pipe under the entrance would lead to nothing!

Rabbo

walkingshadow wrote: »

But even if a pipe was there, the verge has no drain- a 300mm pipe under the entrance would lead to nothing!

Maybe so but its standard practice to install a drainage pipe under new entrances. If there was ever any issue with drainage at the side of the road it would allow access under the entrance

sky6

In all honesty I think you need to get yourself a new engineer. If he doesn't understand what's required. What the CC are looking for a pretty common request in rural area's, especially where it looks as if the driveway is draining out onto a public road. I take your point of it going nowhere but thats not true. The pipe will act like a reservoir and drain away slowly into the subsoil. Keeping the Road free of surface water.

walkingshadow

Thanks guys, my engineer doesnt seem to know about it, is there any link I can show him?

sydthebeat

walkingshadow wrote: »

Thanks guys, my engineer doesnt seem to know about it, is there any link I can show him?

https://myucd.ucd.ie/course.do?courseID=68&sectionID=1188

walkingshadow

Guys, I genuinely do not get the sarcasm here. I had a general query and asked if someone could offer some general advice to a layman on these types of drains as I've never seen one. My engineer insisted it was not needed and I only wanted something to further enlighten myself on the matter.

sydthebeat

walkingshadow wrote: »

Guys, I genuinely do not get the sarcasm here. I had a general query and asked if someone could offer some general advice to a layman on these types of drains as I've never seen one. My engineer insisted it was not needed and I only wanted something to further enlighten myself on the matter.

firstly, you got your answer in the very first reply.... and further in the 7th post

secondly, i suppose many here would not take kindly to someone who appears to be using the site as an alternative to engaging a proper professional,
and to be fair this whole thread smacks of this.
You engineer as you portray him doesn't come across as a proper professional.
If he says you dont need it, surely you asked him why, and would the council be happy with his reasoning... otherwise its a waste of time.
You should be asking your engineer these questions

walkingshadow

sydthebeat wrote: »

i suppose many here would not take kindly to someone who appears to be using the site as an alternative to engaging a proper professional

No wonder you guys went bust in the recession with that attitude- anyways the thing they were referring to was a french drain in front of the entrance.

sydthebeat

walkingshadow wrote: »

No wonder you guys went bust in the recession with that attitude- .

nope, survived it intact

arthur daly

walkingshadow wrote: »

No wonder you guys went bust in the recession with that attitude- anyways the thing they were referring to was a french drain in front of the entrance.

Don't blame people here fir your engineer not knowing his job

arthur daly

walkingshadow wrote: »

No wonder you guys went bust in the recession with that attitude- anyways the thing they were referring to was a french drain in front of the entrance.

Don't blame people here fir your engineer not knowing his job

walkingshadow

No, I was blaming people here for their arrogance and indifference.

BryanF

walkingshadow wrote: »

No, I was blaming people here for their arrogance and indifference.

This board is intended as a place to openly exchange tips and advice for free i.e. no one must seek to gain personally, professionally or financially from their participation in the forum . It is not a consultancy service and it is strongly advised that you always appoint your own professional advisor(s). Be aware that being an open public forum you may not always get exactly the response you would hope for. You will find that there are plenty of posters who will help you here but if you don't like some posts or posters try to pass over them

ShowMeTheCash

From the photo, your engineer is correct you don't need one.

A lot of roads will have essentially a ditch like a V where run off and rain water will flow.

V___________________V

If you put an entrance to a site in can be effectively block the channel so you would need to pipe it under the entrance.


V______()____)_______V