Engineers work to strengthen Toddbrook Dam against extreme weather events

Engineers have installed a new concrete beam inside damaged Toddbrook Dam’s wall - creating an improved waterproof barrier as part of work to strengthen the damaged structure.
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The ‘cut off beam’ has been placed on top of the existing waterproof clay core following excavations into the dam wall.

Over the next few weeks a one-metre-high crest wall will be fixed on top of the dam, while two concrete waterproof barriers down the spillway slope will channel overflowing water into the central undamaged section.

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In early summer the temporary dam works will be followed by improvements to the inlet structures at the head of the reservoir in Whaley Bridge.

Engineers working on the wall after the spillway partially-collapsed in August last yearEngineers working on the wall after the spillway partially-collapsed in August last year
Engineers working on the wall after the spillway partially-collapsed in August last year

A new system of sluice gates is planned - to provide greater control over how much water flows from the brook into the reservoir or around it via a bypass channel.

The Canal and River Trust say the new features will ensure that the dam spillway is secure in the face of any extreme weather event.

They will remain in place until permanent reconstruction of the auxiliary spillway begins – a project which is likely to take several years and cost around £10 million.

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Rob Jowitt, Toddbrook project manager for the Canal and River Trust, told how the reservoir would remain drained to very low levels until the permanent repair project was completed.

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Toddbrook concrete cut off installed.Toddbrook concrete cut off installed.
Toddbrook concrete cut off installed.

He added: “Now the inquiry reports have been published we are working with experienced engineering consultants to produce a costed plan for the dam’s permanent repair.

“We will then enter a 12-week public and planning consultation period before embarking on the construction of the final design solution.

“It is likely work will start on site on this major repair project in early 2021 and take a couple of years to complete.”

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Work to install the clay core ‘cut off beam’ (pre-coronavirus restrictions)Work to install the clay core ‘cut off beam’ (pre-coronavirus restrictions)
Work to install the clay core ‘cut off beam’ (pre-coronavirus restrictions)

Work continues on Toddbrook despite the Canal and River Trust’s postponement of maintenance and repair jobs across the rest of its 2,000-mile waterway network due to coronavirus.

Weekly community open surgery sessions in Whaley Bridge have been suspended following Government guidance on the spread of Covid-19.

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However people can still get in touch by emailing [email protected] or they can view updates on the trust’s website by clicking HERE.

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A rail and bogey system has been introduced along the top of the dam wall to reduce manual handling.A rail and bogey system has been introduced along the top of the dam wall to reduce manual handling.
A rail and bogey system has been introduced along the top of the dam wall to reduce manual handling.

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