Trans Mountain is using trenchless crossings and horizontal directional drilling (HDD) to reduce environmental impact of its expansion project.
The Trans Mountain Expansion Project comprises 980 km of new pipeline, traveling across a variety of terrain that requires a reduction of construction impact.
To focus on environmental protection, innovation and advances in pipeline construction will be utilised including 40 major trenchless crossings.
Many of these crossings will use HDD and range from 400–1600 m in length while several others will be completed using the directional microtunnelling method – a relatively new hybrid method combing HDD and microtunnelling.
By using trenchless methods, Trans Mountain can safely cross underneath watercourses, railways, highways, major roads and other sensitive environmental areas.
Along with environmental protection, the methods will greatly mitigate impact on normal daily activities and traffic circulation patters while eliminating ground disturbance.
Trans Mountain additionally plans to use trenchless methods for its shorter crossings to minimise potential negative impacts by environments traversed by the pipeline alignment.
For more information visit the Trans Mountain website.
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