The period 1750-1755 were years of revolution and change at the Coalbrookdale Works in the Ironbridge Gorge, Shropshire, England. Furnace methods were revised and improved; a steam engine, water wheels and improved wooden bellows were added to increase capacity. To assist these improvements the brook running through the dale was dammed to form the Upper Furnace Pool.
Much later in 1862, with the advent of the railways, a viaduct was built over the Upper Furnace Pool. The line used to carry passenger traffic linking Ironbridge with Wellington but is now exclusively used to carry the coal trains servicing the Ironbridge power station.
The colour of the water is testament to the industrial past of this watercourse.