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Environmental design

Environmental design

Environmental issues have been central to the development of Crossrail from the early stages of the project and from the outset, measures to avoid, reduce or mitigate environmental impacts were incorporated into the design.

Crossrail has adopted two established sustainability assessment methodologies in order to evaluate performance.  These take a whole life view of the Crossrail programme with criteria that cover both construction and operational activities. 

All tunnels, portals (transition structures between surface and tunnel) & shafts (vertical structures linking the tunnel to the surface) are being assessed using the Civil Engineering Environmental Quality (CEEQUAL) methodology and have achieved ‘Excellent’ ratings at Client & Interim Design stage. Our aim is to achieve the ‘Excellent’ rating when the project is assessed as a whole upon completion.

The Building Research Establishment Environmental Assessment Methodology (BREEAM) has been adopted for all central section stations.  This assessment methodology has never been used on an underground station previously and required Crossrail to work with the BRE and consultants to develop specific criteria.  Although this does not provide us with the ability to compare our stations to counterparts outside the project, this will help to provide an assessment tool that can be used for future underground station projects.  Our aim is to achieve a rating of ‘Very Good’.

Completion of Crossrail also requires the delivery of improvements to the existing rail network to accommodate Crossrail services. For these we have committed to using CEEQUAL for railway associated works and BREEAM for the new station at Abbey Wood.

As the project progresses we will work with our contractors to identify opportunities to further improve performance and obtain additional credits within the assessment process.  The overall ratings achieved are an important aspect of the legacy that we leave behind. They are indicators of the long term performance and durability of the infrastructure.

CEEQUAL

The new tunnels, portals and shafts in the central section of the route are assessed for overall environmental quality using the Civil Engineering Environmental Quality (CEEQUAL) assessment scheme.

Areas of particularly good performance continue to relate to management of water resources, protection of water receptors, energy and carbon emissions, local community engagement and stakeholder relations.

On the outer surface sections of the route, several key elements including the Stockley flyover and Acton dive-under are also being assessed under the scheme. Eight projects are currently working towards CEEQUAL ratings. All projects bar one are on track to achieve a score of ‘excellent’. Additional design evidence is required to support the remaining target rating for the approaches leading to Paddington station from Old Oak Common.

CEEQUAL

Target rating

Client and interim design rating

Post construction rating

Western Tunnels

Excellent

Excellent

Excellent achieved

Eastern Tunnels

Excellent

Excellent

On target

Thames Tunnel

Excellent

Excellent

Excellent achieved

Sprayed Concrete lining structures

Excellent

Excellent

On target

Paddington Integrated Project

Excellent

Excellent

Excellent achieved

Eleanor Street / Mile End shafts

Excellent

Excellent

On target

Victoria Dock portal

Excellent

Excellent

Excellent achieved

Pudding Mill Lane

Excellent

Excellent

On target

Royal Oak portal

Excellent

Excellent

Excellent achieved

Connaught tunnel

Excellent

Excellent

Excellent achieved

Stockley flyover

Excellent

Excellent

On target

Acton dive under

Excellent

Excellent

On target

Western outer track infrastructure

Excellent

On target

On target

Western inner track infrastructure

Excellent

On target

On target

Old Oak Common Paddington approaches

Excellent

To be confirmed

To be confirmed

Western stations

Excellent

On target

On target

Northeast section

Excellent

Excellent

On target

Southeast section

Excellent

Excellent

On target

BREEAM

Crossrail has adopted the Building Research Establishment Environmental Assessment Methodology (BREEAM) for the new stations being delivered.

Since the last report, the design stage assessment for Farringdon station has been completed and certified. Opportunities to improve overall performance continue to be explored collaboratively. These are subject to engineering feasibility, cost and programme delivery constraints. Several opportunities are being investigated that will consolidate the ‘very good’ rating and contribute to an overall performance score towards the higher-end of the rating band.

Structures being certified under BREEAM are unlikely to be fully certified for their post-construction rating until late 2017 or early 2018.

BREEAM

Target rating

Design stage rating

Post construction rating

Tunnelling and Underground Construction Academy

Very Good

Achieved

Excellent achieved

Paddington station

Very Good

Achieved

On target

Bond Street station

Very Good

On target

On target

Tottenham Court Road station

Very Good

Achieved

On target

Farringdon station

Very Good

On target

On target

Liverpool Street station

Very Good

Achieved

On target

Whitechapel station

Very Good

Achieved

On target

Custom House station

Very Good

Achieved

On target

Abbey Wood station

Very Good

On target

On target

Woolwich station

Very Good

On target

On target

Ilford logistics and stores

Very Good

Achieved

Very good achieved

Ilford operations and welfare

Very Good

On target

On target

Plumstead depot

Very Good

On target

On target

Old Oak Common depot

Very Good

On target

On target

Several opportunities are being investigated that will consolidate the “very good” rating and contribute to an overall performance rating and contribute to an overall performance score towards the higher end of the rating band.

Structures being certified under BREEAM are unlikely to be fully certified for their post-construction rating until late 2017- or early 2018.