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Magdalen Fen Strategy Project
Magdalen Bridge Outfall
Services
Civil Engineering
Partners
Breheny Civil Engineers
Start & Completion
May 2025 – August 2025
This area drains by a gravity outfall on the western side of the catchment into the Middle Level Commissioners’ Main Drain (MLMD). The MLMD also serves as a navigation channel, which requires it to be held at higher levels, occasionally limiting gravity discharge and increasing flood risk within the Magdalen catchment. The absence of a flap valve on the outfall meant water levels in the MLMD directly influenced catchment levels.
The Magdalen Bridge Outfall Project has installed a new 30-metre culvert with precast inlet and outlet structures fitted with a flap valve and penstock to manage water flow and prevent backflooding.
To ensure ecological compliance, water vole mitigation was undertaken in spring ahead of construction.
The construction ofthis first phase of the Magdalen Fen Strategy Project was completed in August 2025.
Project Photo Gallery
July 2025 - Temporary sheet piling at the culvert inlet creates a dry working area, with over pumping in place throughout construction works
July 2025 - The new culvert pipework is laid
August 2025 - The new pre-cast outlet head wall is lifted into place
September 2025 - The completed culvert (inlet on left and outlet on right)
September 2025 - The new culvert outlet, with non return flap valve
April 2026 - The new culvert outlet, with non return flap valve
April 2026 - The completed culvert (inlet on left and outlet on right)