- to implement improvements and initiatives to reduce the environmental and social impact of the Hammersmith Bridge gas pipe diversion project.
- to lay approximately 2.5km of new medium pressure gas pipe before decommissioning the existing gas pipes crossing Hammersmith Bridge.
What we have successfully achieved
- Welfare Support Unit – Utilising solar panel arrays to harvest free renewable energy, consuming less than 10% biofuel, 100% rainwater harvesting and running at 100% near-silent, the unit reduces environmental and social impact on residents, stakeholders and wildlife.
- Transition to Hydrotreated Vegetable Oil (HVO) – All site plant and machinery transitioned to biofuel reduces carbon emissions by 90%, therefore minimising impact on local air quality.
- Electric Reinstatement Tools – A fully electric trench rammer and disc saw was trialled to demonstrate feasibility to reinstate sustainably whilst providing near-100% reduction in local carbon emissions and significant reduction in noise.
- Recycling of Excavated Soil – We engaged with the Local Authority and recycled excavated soil back into the trenches by filtering fine fill on-site. This provides resource savings through reduction of traffic movements required to transport materials.
- Use of Trench Cutter – implementation of an operational change from excavating with an excavator to a trench cutter. The trench cutter has not only reduced fuel consumption by approximately 80%, but also machinery operating time by up to 8 hours, reducing disturbance to customers and residents.
We started from the planning stage of the project
At the planning stages of the project we looked at what we could do to reduce emissions and be more sustainable throughout the project.
It was agreed to explore options to reduce the local environmental and social impacts of the project and that further initiatives could be implemented beyond usual business practice.
Cadent along with Morrison Energy Services Ltd and Terrafirma Pipeline Ltd worked together and are committed to supporting the Government’s pledge to achieve net zero before 2050 and provided additional funding to implement the various initiatives used on site.
Environmental Benefits and Innovation
The Welfare Support Unit
The welfare support unit on site provides engineers a location for their facilities to ensure it is neat on site and that staff do not need to leave site unnecessarily.
The facilities include
- a small office, kitchen, toilets and drying area.
- Carbon neutral
- 100% renewable energy
- Solar powered with biofuel back-up
- Low emissions
- Rain harvesting
- 97.2% recyclable
The welfare support unit collects rainwater via raised parapets circling the roof’s edges.
- It then runs through a filtration system and to the welfare’s clean water tank. From there, we can use it from both sinks situated in the canteen and toilet.
- The welfare support unit runs predominantly on its solar panels. In the circumstance of long power use, the welfare will be assisted by HVO biofuel tank.
- All elements of the welfare support unit can be monitored via a control panel to help us gauge our usage to be as eﬃcient and sustainable as possible.
Plant and equipment
- Excavator – runs on bio-fuel
- Trench rammer & disc saw – fully electric