Water Company £100m Tunnel: Hampshire’s Dry Rivers Refilled | Southampton Link Main Explained (2026)

Southern Water's £100 million Southampton Link Main scheme is a groundbreaking project designed to alleviate pressure on two vital rare chalk streams in Hampshire. This ambitious initiative involves the construction of 19 kilometers of pipeline in Hampshire, connecting Otterbourne to the Yew Hill reservoir near Winchester and then extending south to the Rownhams water supply works on the outskirts of Southampton. The project aims to ensure a reliable water supply and protect these precious natural resources. With completion expected in 2028, this tunnel system is set to make a significant impact on water management in the region, but it also raises questions about the balance between environmental preservation and infrastructure development. As the project unfolds, it invites discussion and debate on the challenges of managing water resources in a changing climate.

Water Company £100m Tunnel: Hampshire’s Dry Rivers Refilled | Southampton Link Main Explained (2026)
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