Project Brief Following the devastating floods in June 2007, J N Bentley were tasked with the new flood defence project for the Kelham Island Museum in Sheffield. The museum shows a history of the area’s steel and cutlery industries and house’s the 12,000 horse power River Don Engine built by the Davy Brothers of Sheffield in 1905.  Solution Frasers, the builders merchant, chose Marshalls Civils and Drainage's specialist precast team to manufacture and deliver precast reinforced beams to fit between the L Shape posts and form a new retaining wall that was higher than the existing ground levels. This solution was put in place to help improve the flood defences from the adjacent river.