Category: HS2

Following on from its crossing of the Grand Union Canal this spring, the huge viaduct is finally built. The giant red “launching girder” which spent a couple of years crawling across the Colne Valley building the viaduct below itself, lies in pieces at the end of its journey, being packed up into shipping containers ready […]

A quick visit to the Grand Union Canal between Harefield and Denham, at the point where the Colne Valley Viaduct, part of the HS2 railway, crosses it. The construction of the two-mile-long viaduct has been creeping towards the canal for the last two years, and new the red construction girder has slid across the canal […]

High Speed 2 (HS2) will leave London by curving away from the Chiltern Main Line, across the Colne Valley on what will the the UK’s longest railway viaduct. It crosses the Greater London boundary before briefly coming back to ground level and then on into the Chiltern Hills in a long tunnel. The place between […]

In the first post in a mini-series, I looked at how High Speed 2 is impacting West Ruislip and Ickenham. In this second piece, I move slightly west, to look at the Colne Valley Viaduct. At 2.2 miles long, this will be one of the biggest structures on the entire line. The viaduct is what […]