00:00We're currently standing on the Coptall Tunnel. There's been various efforts made by the whole
00:05team with regards to making this kind of as environmentally friendly as possible.
00:11This ranges from the concrete mix design that was used to construct the actual tunnel and
00:17also involves the reuse of thousands of tons of reused material which are excavated from
00:22the Northolt Tunnel's west. With a little bit of treatment we've been able to reuse that material,
00:26avoided significant flooring movements on the roads and significant carbon emissions associated
00:31with the extraction of new quarried materials. And then finally to cover that we're then
00:37constructing a mosaic of habitats across this entire tunnel. The tunnel is designed to fit within
00:45the environment as opposed to the environment being fitted around the tunnel. The mosaic of habitats
00:51consisting of grasslands, deciduous woodlands, scrublands, extending all the way down to a new
00:57wetland habitat corridor down with the New Year's Green Bourne which is just over to our norms over
01:01there. The Cockfall Tunnel in west London is HS2's only single bore tunnel which means trains traveling
01:08in both directions will share the structure at different times. Rail Minister Lord Peter Hendy
01:14said the completion of Cockfall Tunnel marks another significant milestone for HS2. He said
01:20making use of innovative design, the tunnel reduces the impact on nearby communities by blending into
01:26its surroundings while keeping thousands of truck journeys off local roads by using materials close
01:32to the site. He added the reset of HS2 is driving faster, more efficient construction on the ground and
01:39supporting thousands of jobs as we work to deliver the project at the lowest reasonable cost.
01:45It is so that the the lorry movements that we've reduced on the on the roads around the local area
01:50this associate disruption that comes from residents and increased traffic and and can being reduced
01:56congestion and reduced you know tailpipe emissions I think has had a significant impact.
02:01The construction of the the tunnel has been designed to reduce the cementitious content of the tunnel itself.
02:08Therefore you know a higher cementitious content in the concrete would generate high carbon emissions.
02:13So we're working well as a team to really reduce and drive down carbon emissions the whole project
02:19and then to generate a a new environment. I think in the local area I think it's the work that
02:26has been
02:27done and will be done I think will have a very positive impact on on the surrounding area. The disruption
02:33you know during construction does exist but the benefits at the end in 5 10 15 years time when
02:39habitats have been and landscapes have been established I think will will show kind of and
02:45come to fruition what we're trying to create the increased connectivity with habitats and the ecological
02:50benefits I think will will have a vast a vast benefit to the local area and hopefully to across the
02:57the whole NHS2 route as it goes north from here.
02:59For more information visit www.fema.gov.au
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