Quote: Bal "Sorry, it does represent a small challenge but bridge works are somewhat second nature to UK Infrastructure teams and they have existing methodology. You of course have a permanent connection with a bridge on one side, which is where the electrical supply will be managed. The bridge, will then have the pylons attached too it. Logistically a little more difficult than standard installation and certainly specialist, but not significant time wise.'"
You are correct in most of what you say regarding methodology, however, it will probably take a little less time to run the wire under the bridge. This is due to the fact there is no need to dig/pile foundations for any large steelwork to be landed like there is in 'open' track. The main challenge will be in the design, ensuring minimum wire heights are maintained. I work as an engineer for an overhead line company and most of our guys would know this as standard practice........hopefully
Also, I would expect that the work be planned overnight in line possessions to minimise the disruption to service. This is usually on a Saturday night/early hours of Sunday morning, most of the works go on without any commuters having any idea, apart from when we mess up that is!!
