Appendix 1 - Fibre Digging Costs

We have been over this before but just to recap.

Our model is for a cross country deployment with the fibre laid along the inside of field boundaries. For the backbone routes we would lay dual 40mm HDPE duct into which we would pull 144 fibre cables. To improve maintainability we would coil up spare fibre in every access chamber to give us slack to pull back for repairs. Allow 10% additional fibre for this so that’s 1100m per kilometre and double that as we have two ducts to fill making 2200m per km.

We would use agricultural contractors to dig the ducts rather than telecommunications contractors except when we cross roads where we have to use street works certified contractors. Working on a man plus mate and a mini digger we should be able to dig on average around 200m but lets be a bit more pessimistic and say 160m per day and the team costs £320/day so lets say £2/m dug . Note I am assuming we pay for all the digging and don’t factor in any work done by the land owners. As discussed above we would hopefully get a lot of the route dug without cash payments by issuing shares at the same rate as we would have paid a contractor. Note that I’m not expecting to pay £2/m as around £1.5 should be realistic but this appendix is putting together a very pessimistic set of figures to prove we can handle the worst case costs.

Let us assume that we will need a break out point every 250m along the route which means we need an access chamber located there and also a splice bullet.

Let us assume that we will have to cross a road every 500m of route and that this will involve an access chamber on both sides of the road, a sub-ducted duct across the road to give us future proofing and assume the road is good quality tarmac. Let’s say £1K per road crossing.

Let’s assume a dry stone wall every 333m which will need dismantling and rebuilding after we have gone and that each will cost us £200 to do.

Let us assume that there is no opportunity to mole plow and instead we have to dig the whole route to lay the ducts.
The per kilometre costs begin to look like this:

So let’s round that up to £15000/Km and this is what I’ve used in the plan.