Upper Derwent Valley

The Upper Derwent Valley is an area of the Peak District National Park in England. It largely lies in Derbyshire, but its north eastern area lies in Sheffield, South Yorkshire. Its most significant features are the Derwent Dams, Ladybower, Derwent and Howden, which form Ladybower Reservoir, Derwent Reservoir and Howden Reservoir respectively.

In 1899, the Derwent Valley Water Board was set up to supply water to Derby, Leicester, Nottingham and Sheffield, and the two Gothic-style dams were built across the River Derwent to create Howden Reservoir (1912) and Derwent Reservoir (1916).

West of the Derwent a large village known as Birchinlee, locally known as 'Tin Town', was created for the 'navvies'—the workers who built the dams—and their families, many of whom came from the Elan Valley Reservoirs in Wales.

The villages in the Upper Derwent Valley:

A standard gauge railway, for transporting materials, connected the Water Board offices in Bamford with the work site. A section of the track of the railway is now a footpath; other sections are visible when water levels in the reservoirs are low. The railway engine house no longer exists at the old offices. The offices are now occupied by a Quaker group.

Over the decades, demand for water increased. Piped intakes were constructed from the rivers Ashop and Alport to the west to feed directly into the Derwent reservoir, but soon demand increased further to the point where another reservoir was required. The larger Ladybower Reservoir, built largely during World War II, necessitated the flooding of the villages of Derwent and Ashopton, with the occupants being relocated to the Yorkshire Bridge estate, just downstream of Ladybower dam. A packhorse bridge with a preservation order on it also had to be moved, and was rebuilt at Slippery Stones, north of Howden Reservoir. The bodies in the churchyard were exhumed and reburied at Bamford. The reservoir was completed in 1945.

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