by Rachael Bower-Yekpe | Apr 23, 2026 | Water
It’s not only trenchless crossings that need geotechnical expertise. OPTIMUM has been supporting Eiffage over recent weeks on a different sort of mission: the demolition of an ageing ovoid sewer section to make way for a new storm overflow valve chamber.This crucial...
by Rachael Bower-Yekpe | Mar 19, 2026 | Electricity
Supporting RTE in its network-upgrade programme requires not only equipment but also precision engineering.Beneath a five-way road junction in Lille, a 3-metre‑diameter wastewater pipe dominated the underground space. It was impossible to move and impossible to bypass...
by Rachael Bower-Yekpe | Mar 5, 2026 | Corporate
We are delighted to welcome Laurent Pillot this week, who joins OPTIMUM as Director for Central and Eastern France, based in our new offices in Lyon.Laurent brings with him a wealth of experience in construction and trenchless work, including over 20 years at the head...
by Rachael Bower-Yekpe | Mar 2, 2026 | Water
After 17 days of meticulous tunnelling — passing just 66 cm beneath two major wastewater pipes — a 1,730 mm (external) / 1,400 mm (internal) diameter microtunnel in Port-Jérôme-sur-Seine (near Le Havre) is now complete. The 159‑metre-long microtunnel will double...
by Rachael Bower-Yekpe | Feb 5, 2026 | Electricity
To complete the connection to Endesa’s solar power plant in Puertollano, southern Spain, only one task remained: a 200-metre-long trenchless crossing under the Madrid-Seville high-speed railway line and the adjacent Ciudad Real-Puertollano-Badajoz railway. However,...
