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Catchment Management

Spillway improvements at Damflask reservoir

Yorkshire Water are about to start an £800,000 spillway improvement project at Damflask Reservoir.

Damflask Reservoir is situated in the Peak District National Park near to the village of Low Bradfield. A long, circular, route around the reservoir and through Yorkshire Water land allows visitors to enjoy beautiful stretches of woodland and waterside. The three and a half mile route also offers fantastic panoramic views across Damflask Reservoir. It’s also one of Yorkshire’s premier fisheries, boasting a coarse and pike fishery which is very popular with anglers.

Engineering specialists, Mott MacDonald Bentley (MMB), will start work on spillway improvements at Damflask this month (November 2016).

A spillway is an overflow structure which is used to control water flows into the area downstream of the reservoir. It is used when the reservoir is full, to pass floodwater safely, and in a controlled way downstream so water does not overtop the dam.

Initially work involves clearing vegetation and cleaning the spillway. MMB will then grout and re-point the spillway. Fittings in the valve towers and pipework in the embankment will also be replaced.

To enable the work to take place safely the water level in the reservoir will be maintained at its current level over the winter months so the reservoir will look lower than it normally would in winter. It will be left to fill up naturally after the work is complete.

Jordan Langbridge, Yorkshire Water Project Manager said; “The work will ensure that the spillway continues to carry out its role of protecting the reservoir embankment from flood erosion by safely diverting excess water flows away from the site.”

“We’d like to reassure visitors that the fantastic recreational activities at Damflask will be unaffected during this project.”

The work will take about 18 months to complete.

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