Old Oak Common
We were employed by the Costain Skanska joint venture to carry out the enabling works package at HS2 Old Oak Common.
This project was part of the wider £1.3 billion Old Oak Common redevelopment scheme - the largest station building programme since the Victorian era. When completed, Old Oak Common will incorporate a new train station for HS2 and Crossrail services, 25,000 new homes, retail outlets and will bring over 60,000 new jobs to the area.
Technical Challenge
Access to the site was modified to allow for the influx of demolition and construction plant and materials.
All arisings were segregated and stored for later infilling works.

Underlying utility assets were located via hand excavation and their depths recorded.

The project consisted of the initial infrastructure works to the depot entrance, site clearance, demolition of multiple structures including the removal of asbestos, ground investigation, remediation design and the subsequent remediation of the entire 5.5 hectare site.
Following on from site clearance, we undertook the demolition of several structures on the Old Oak Common site, including train maintenance sheds, train wash warehouse, short stabling sheds and GWR train maintenance sheds.  
Asbestos Removal

Asbestos removal works included the removal of some 3,000m2 of asbestos insulation board to the GWR maintenance shed.


Remediation works were carried out throughout and formed the main part of the works package. Prior to commencing works a full site investigation was undertaken on a 25m grid basis, all trial pits were dug until natural clay was found. Following the site investigation works we completed a remediation design prior to commencing the full site remediation works. Typically following the demolition phase of a particular area, the bulk of the contaminated material was in the form of rail ballast and soil. Prior to any remediation work taking place, the remediation strategy was then implemented for that area which determined the methodology and approach to this phase of the project. The remediation area constituted up to 5.5 hectares in size across 5 sub-areas.

In numbers

In total 160,000 litres of hydrocarbon containing liquids were removed from the site. We excavated 100,000m3, backfilled 45,000m3 and installed capping material across site at 25,000m3. Comprehensive validation testing data was also undertaken on all backfill material with detailed handover packs completed for each area of the site.

Adjacent stakeholders

We maintained strict working regulations with respect to adjacent stakeholders such as TFL (Crossrail depot), Network Rail (Great Western Rail) and Hitachi. This included trackside PTS regulations and asset protection in the form of the 5m Asset Protection Approval process whereby plant could only operate outside of the zone of influence. This agreement was ultimately agreed and implemented by TFL issuing us with a Letter of No Objection.

Summary of service
Asbestos Removal
Site Clearance