Trenching next to a weeping willow

[dumper]

Mooring will work we do up 200 MM with moles another option would be directional drill not cheap but little disturbance and you could lay pipe in single length all joints being fused 

[eggsarascal]

12 minutes ago, Garthegard said:

Thanks for all your replies i really appreciate it. It'll be discharging to watercourse from someone else's property (the legality of that is all sorted). 

Unfortunately it has to go past the trees somehow (it needs to go from the lefthand side of the road to about 50ft the other some of that fence). It's just a case of where and how.

I like the moling idea but I'm not familiar with it so don't know if it's suitable, 6" solid plastic pipe needs to be layed. 

Is this pumped discharge? 6” sounds big for a domestic property… unless you live in a mansion with stacks of people living there.

[aspenarb]

13 minutes ago, Garthegard said:

Thanks for all your replies i really appreciate it. It'll be discharging to watercourse from someone else's property (the legality of that is all sorted). 

Unfortunately it has to go past the trees somehow (it needs to go from the lefthand side of the road to about 50ft the other some of that fence). It's just a case of where and how.

I like the moling idea but I'm not familiar with it so don't know if it's suitable, 6" solid plastic pipe needs to be layed. 

 

That really wouldn't be an issue providing the ground wasn't made up of rock, as I said earlier the bore would be10x diameter deep so at five feet down there would be little to no chance of disturbing the tree roots.These machines tow in the pipe as they go, the start hole would have to be long enough to accommodate this.

 

Bob

[Deafhead]

What is the invert depth below ground level where you will be passing the trees? as its a 6" pipe are you serving more than one property?

[Deafhead]

Looking back at the original post, I would say that an 18" trench 3' deep at 13' from the tree should be ok.

[monkeybusiness]

In my opinion at 4m away you will be fine to just dig a trench. Willows are incredibly resilient, and you are far enough away that you are highly unlikely to destabilise the tree.

From the pics it looks like at that distance you are digging in the roadway anyway, so you aren’t going to be disturbing anything important root-wise. 
Biggest issue will be making sure the pipes are laid correctly as any weeping joints etc will be a magnet for roots in the future…

[Dan Maynard]

Could dig the trench and pollard them, or even fell and leave stumps, in 10 years you'd have a pair of multistem trees nearly that big which have sorted themselves out a new root system.

 

They are willows not ancient oaks, unlikely to be all that old anyway.

[woody paul]

I would be more worried about roots getting into pipe, or is this your concern. 

 

[Canal Navvy]

As I understand it you are contracting to someone who is having to update their system due to it discharging to a watercourse and have an easement over their neighbours land. In my experience domestic sewage treatment plants need a power supply to operate the aeration system. Selecting a system with a pumped discharge would make it easy to install the pipe run without undue disturbance and without any joints or risk of future blockage. 

 

 

 

[eggsarascal]

14 minutes ago, Canal Navvy said:

As I understand it you are contracting to someone who is having to update their system due to it discharging to a watercourse and have an easement over their neighbours land. In my experience domestic sewage treatment plants need a power supply to operate the aeration system. Selecting a system with a pumped discharge would make it easy to install the pipe run without undue disturbance and without any joints or risk of future blockage. 

 

 

 

Not all plants are aerated, in fact many aren’t.