Refurbishment & modernisation |
Modernising global water structures
Repair, refurbishment and repowering works have been taking place at projects globally
Above: A new side weir and tumble bay are being constructed next to the reservoir at the top of the spillway at Todbrook
Below: Below the dam wall, a new stepped spillway structure is being created out of reinforced concrete to carry water from Todd Brook, plus any reservoir overflow, on its journey into the River Goyt
OVER THE PAST FEW months, the Canal and River Trust says good progress has been made with restoration of Toddbrook Reservoir, near Whaley Bridge in England. A major project to repair the reservoir swung into action after the dam auxiliary spillway was damaged during a period of intense rainfall in August 2019. Work to create a new reservoir overflow spillway is now in a final phase of intense activity over the next nine months.
With the challenging excavations and successful
installation of foundations and piling complete, contractor Kier is now said to be well on course to build the new side weir, tumble bay and spillway with hundreds of tons of reinforced concrete. On the site of the old playground, foundations are
being laid to construct a new bridge over the channel just before it enters the River Goyt. And the stilling basin staircase and two large turrets, whose job is to slow down the water flow, are now clearly visible and nearly finished. Ultimately, they will be partially buried as part of the final landscaping works. Later this spring, when the overflow spillway structure is sufficiently advanced, the work will be inspected by a government-approved specialist reservoir engineer before a new opening in the dam is made to enable completion of the spillway structure. The damaged concrete panelling will then be removed, the dam slope repaired over the summer and completely grassed over. Re-filling of the reservoir will be allowed to take
place naturally over the winter 2025/spring 2026, after the dam spillway and weir construction project is completed. Safety is paramount, the Canal and River Trust says, and the gradual rise in water level will be a phased 16-week monitored process. The effectiveness of the reservoir will be thoroughly tested to ensure the integrity of the new structure,
32 | June 2025 |
www.waterpowermagazine.com
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