As 6 trenchless crossings were successfully completed for a GRTgaz DN300 gas pipeline diversion in northern France recently, the importance of having trenchless expertise from a project’s outset was again apparent.
The crossings pass under rivers, roads, a brownfield site, agricultural land and even a UNESCO-listed heritage railway line and range from 25m to 285m in length. As such, OPTIMUM was mandated by GRTgaz in 2021 to conduct preliminary analysis (G1 PGC) and detailed feasibility studies (G2 PRO).
Trenchless specialists designed 3 HDD and 3 auger boring crossings, each one tailored to give the best technico-economic solution whilst preserving the existing structures as well as the activity of the rural and peri-rural environment. The designs were followed, with each drilling operation running smoothly, to time and budget.
