Ladybower

Ladybower
Name	Ladybower Reservoir
Location	Derbyshire, England
Type	Reservoir
Inflow	River Derwent, Ashop Brook, Binn Brook
Outflow	River Derwent
Basin countries	United Kingdom
Constructed	1935–1943
Operator	Severn Trent

Ladybower is a large impounding reservoir in the Derbyshire Dales of Derbyshire, England, situated in the upper reaches of the River Derwent. Constructed in the late 1930s and early 1940s, it forms part of a system of reservoirs that includes Derwent Reservoir and Howden Reservoir within the Derwent Valley World Heritage Site catchment. The reservoir and its valley are notable for their engineering features, historical village submergence, ecological value, and frequent appearance in film, literature, and aviation lore.

Geography and Hydrology

The reservoir lies in the Upper Derwent Valley on the western edge of the Peak District National Park, between the towns of Matlock and Sheffield and near the village of Castleton. Fed primarily by the River Derwent and tributaries such as Ashop Brook and Binn Brook, the storage regime is coordinated with Howden Reservoir and Derwent Reservoir to manage regional water supply for Sheffield, Derbyshire, Nottingham, and Leicestershire. The reservoir basin occupies a glaciated valley carved during the Pleistocene, with surrounding geology dominated by Carboniferous Limestone and Millstone Grit scarps characteristic of the Peak District. Hydrological management has historically balanced potable water abstraction for the Severn Trent supply network with flood control for downstream settlements including Derby and Chesterfield.

History and Construction

Advocated by municipal authorities such as Sheffield City Council and driven by interwar urban expansion, the project received parliamentary approval under water acts of the 1930s. Construction began in 1935 under contractors including firms linked to the River Board system; major phases continued through the Second World War with completion in 1943. The scheme required the compulsory purchase and planned inundation of four villages, notably Ashopton and Derwent, whose churches, homes and infrastructures were demolished and submerged after the removal of graves and relocation of residents. Elements of the relocation process intersected with organizations such as the Ministry of Health and local authorities, while wartime labour and materials constraints involved agencies like the Ministry of Supply.

Engineering and Design

The main dam is an earth-and-rock embankment with a clay core, engineered to modern standards of the 1930s. The design incorporated twin plug holes—automatic bell-mouth spillways—cut into the embankment to control extreme inflows; these plunging overflows are recognized examples of hydraulic engineering comparable to structures at Howden Reservoir and Derwent Reservoir. Structural analysis during design referenced contemporary practices from projects such as the Elan Valley Reservoirs and drew on expertise associated with the Institution of Civil Engineers. Operational control integrates gauging stations reporting to regional water authorities, and maintenance protocols have evolved under the stewardship of Severn Trent and predecessor water boards.

Environmental Impact and Ecology

Construction and inundation radically altered the valley’s terrestrial habitats, submerging mixed farmland and riparian woodlands. Since creation, the reservoir has developed lacustrine and marginal habitats that support populations of brown trout, Atlantic salmon, and freshwater invertebrates monitored by agencies including the Environment Agency. Upland moorland and wet heath on surrounding hills are important for bird species tied to the Peak District National Park, including red grouse, curlew, and migratory pink-footed goose movements. Conservation efforts involve partnerships among Natural England, Derbyshire Wildlife Trust, and local parish councils to manage invasive species, protect peatland hydrology, and balance recreational access with breeding seasons for sensitive avifauna.

Recreation and Tourism

The reservoir and adjacent farmland provide a network of public rights of way and trails utilized by walkers, cyclists, and birdwatchers, linking to routes such as the Pennine Way and local trails around Ashopton. Boating and angling are regulated by Severn Trent permits and local angling clubs affiliated with the Game & Wildlife Conservation Trust. Visitor facilities and car parks cater to tourists drawn from Sheffield, Manchester, Nottingham, and beyond, with accommodation provided in nearby settlements including Hope Valley and Castleton. Seasonal events, guided walks, and educational programmes are often run by organisations such as the Peak District National Park Authority and Ramblers.

Cultural Significance and In Popular Culture

The submerged villages and distinctive concrete overflow structures have made the site a recurrent motif in literature, film and television. Cinematic use includes sequences filmed for productions associated with studios in Sheffield and London, while the valley’s wartime associations feature in local histories and oral testimonies archived by organisations such as the Derbyshire Record Office. Aviation-related lore links to Royal Air Force training and an infamous World War II aircraft incident whose wreckage emerges occasionally at low water levels, attracting historians and documentary makers. The reservoir and valley appear in guidebooks published by Ordnance Survey and inspire artworks held in collections at institutions such as the Derby Museums.

Category:Reservoirs in Derbyshire Category:Peak District