 In 1826 he constructed a model of a landing stage proposed by Brunel for use at Liverpool.Donkin's works regularly supplied machinery for use in civil engineering projects, including dredging machines for the Caledonian Canal in 1816, the Prussian Government in 1817, the Göta Canal (Sweden) in 1821, and the Calder and Hebble Navigation in 1824.Stationary steam engines were also supplied for use in the construction of the locks on the Caledonian Canal.