Proud to announce the successful completion of the final 3 HDD crossings for Teréga’s 23km network extension in the Tarn-et-Garonne region of southwestern France. From feasibility studies to construction, OPTIMUM engineers have accompanied project owner Teréga at every step of the way since 2019.
These last 3 horizontal directional drills again passed under key infrastructure, the deep surface alluvium requiring entry casings for each :
- Under the river Tarn : a 420-metre-long HDD, housing a DN 80 steel pipe, drilling 18m under the riverbed.
- Under rail and canal: a 425-metre-long HDD, housing a DN 200 steel pipe, passing 23m below the Bordeaux – Toulouse – Sète railway line as well as the Canal de la Garonne.
- Under rail : a 190-metre-long HDD intersect further down the line, to house a DN 250 HDPE pipe, 16m under the tracks.
A dedicated team of OPTIMUM engineers followed these critical sections, where continuous monitoring of the railway platform, as well as weekly piezometrical surveys were conducted to ensure the integrity of the drilling works.
A great project to work on ! Thank you to Teréga for the opportunity to be part of another key project to expand the region’s energy network. And to Catalana for the great teamwork throughout the construction phase.
