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Wigan flood alleviation scheme approaches finish

A £12M flood alleviation scheme on the River Douglas close to Wigan town centre is nearing completion, following the installation of two giant Hydro-Brake Flow Control devices.

Contractor Galliford Try is constructing the 8m high, 120m wide and 120m long dam which houses the 2m diameter Hydro-Brakes, in an 80-week contract. The two cone-shaped Hydro-Brake Flow Controls, weighing 15t each, were lowered into the dam with a 200t crane.

Consultant Jacobs and the Environment Agency worked closely with Hydro on the project.

The dam has created a potential 370,000m³ of flood storage extending along 1km of the Douglas valley. The scheme will reduce the flood risk to around 600 properties, which now have just a 1% chance of flooding from the river in any given year. 

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