Caugh Hill WTW Intake & Access Road

Doran Consulting designed and project managed the Glenedra River Intake improvements and new Glenedra River Bridge at Caugh Hill water treatment works (WTW) near Dungiven.  The water treatment works takes water from the Glenedra River to treat and distributes up to 34 million litres of clean drinking water per day to customers in the North West. 

The water intake structure was originally built beside the Glenedra River, inside Banagher Forest, in the 1960s.  After fifty years in service Northern Ireland Water decided to refurbish the structure.  A new bridge was needed to cross the Glenedra River to allow construction traffic to access the intake structure and to allow NI Water to maintain it in future.


Environmental management was of the highest importance during the construction works.  The contractor, BSG Civil Engineering, prepared and executed an environmental management plan to ensure that the environment was protected throughout the project.  As part of the environmental management plan a pre-construction habitat survey carried out, the river was protected from runoff from the construction site and decking was installed to prevent debris falling into the river.  The area used for the construction site was carefully selected to ensure that no valuable habitat was damaged.  Water samples were collected during the construction period to ensure that there was no contamination of the water.


The new bridge is a "FlexiArch" system made by local company Macrete in Toomebridge.  The bridge was built and the intake refurbished between November 2015 and March 2016.  The bridge is now part of a track that can be used by Forestry Service and members of the public.