RTE (Réseau de Transport d’Electricité) is putting four 225,000 volt power lines underground in the municipalities of Saint-Denis, Île Saint-Denis (93) and Villeneuve la Garenne (92).

By 2024, 15 km of power lines and 27 pylons will be removed, freeing up more than 80 hectares of land for several development projects.

To replace the overhead lines with underground lines, RTE has chosen a tailor-made technical solution : the creation of a 40 m deep and 2.5 km long tunnel.

The work will be carried out in 4 main stages:

• 2020: Construction of the entrance and exit shafts for the tunnel boring machine.
• 2021: Digging of the 2.5 km long tunnel by a tunnel boring machine
• 2022: Fitting out the tunnel and connecting the new power line.
• 2023 – 2024: Removal of the pylons and overhead lines, from 2023 until the end of 2024.

For the creation of this tunnel, RTE relies on the expertise of Arcadis as assistant project manager, as well as on a group of companies Spie batignolles fondations, SETEC and SPAC and on its representative Spie batignolles génie civil.

Contracting authority: Réseau de Transport d’Electricité (RTE)

Total budget: this 89 million€ project is co-financed by the SOLIDEO, the Greater Paris Metropolitan Area, the municipality of Villeneuve-la-Garenne and RTE.

Financial contributions: SOLIDEO : 30.4 M – Métropole Grand Paris : 17.9 M, Ville de Villeneuve-la-Garenne : 13.3 M – RTE : 27.1 M