On 04/01/2018 15:36, Andy Burns wrote:
The Natural Philosopher wrote:

cost of repairing overhead 11KV fault. £2000.
Cost of undergrounding it - £30,000 per kilometer.

£250m for 8 miles in Stratford

https://www.arup.com/projects/london-2012-powerlines-undergrounding

They did something similar in Barcelona when they had their Olympics
windfall IIRC. But not that deep - 30m?! Pretty much future proofs
infrastructure of this kind.

The private sector is not likely to take such a long-term view.

--
Cheers, Rob