Derwent Reservoir (Derbyshire) Totally Explained

Everything about Derwent Reservoir Derbyshire totally explained

ť Not to be confused with Derwent Water in Cumbria

Derwent Reservoir is one of three reservoirs in the Upper Derwent Valley in the north east of Derbyshire, England. The River Derwent flows first through Howden Reservoir, then Derwent Reservoir and finally through Ladybower Reservoir. Between them they provide practically all of Derbyshire's water, as well as to a large part of South Yorkshire and as far afield as Nottingham and Leicester.
Derwent Reservoir is around in length, running broadly north-south, with Howden Dam at the northern end and Derwent Dam at the south. A small island lies near the Howden Dam. The Abbey Brook flows into the reservoir from the east.
At its peak the reservoir covers an area of 70.8 hectares (175 acres) and at its deepest point is 34.7 metres deep.

History

The Industrial Revolution and urbanisation of the 19th century created huge demand for water in the industrial cities of the East Midlands and South Yorkshire. The proximity of Sheffield and its neighbours to the Upper Derwent valley were thus factors in the decision to dam the valley to create the Howden and Derwent dams.
   The neo-Gothic dam was begun in 1902, a year after Howden was started, and proved a mammoth task. The huge stones that formed the walls of the dam were carried along a specially created railway from the quarries at Grindleford. Over 1,000 workers lived in a specially constructed self-contained town called Birchinlee or "Tin Town". One of the metal huts was preserved and moved to the village of Hope, where it's now a hairdressing salon.
   The reservoir was first begun to be filled in November 1914, and overflowed for the first time in January 1916, with the water almost immediately passing into supply. The dam can support a total of 9.64 million cubic metres of water.
   Only two years after the dam's completion in 1916, it was decided that the flow from the reservoir was insufficient to support the surrounding population. As a result, between 1920 and 1931 the rivers River Alport and River Ashop were also diverted from the Ashop valley into the reservoir using tunnels and a Venturi flume.
   The diversion helped hold back water during the construction of the Ladybower Reservoir to the south, which was constructed between 1935 and 1945.

Bamford and Howden Railway

Between 1901 and 1903 a standard gauge railway of over was built from the town of Bamford to the south of the reservoir to Howden, to carry the thousands of tons of stone required for the construction of the two dams. Near to the southern end lay the newly opened quarry at Bole Hill near Grindleford.
Remains of the railway can still be seen alongside Derwent Reservoir as well as at the western end of the Ladybower dam where over of cutting and trackway remain, and are known locally as 'The Route'. Between the Howden and Derwent dams the present road was built over the top of the railway.
After supplying well over a million tons of stone the Bole Hill quarry was closed in September 1914, with the end of the railway following soon after. The section between the mainline railway at Hope and Yorkshire Bridge was relaid in 1935 to aid the construction of the Ladybower dam, but closed again in 1946.

Countryside

The majority of the land around the reservoir is owned by Severn Trent Water, and of that around half is woodland. The woods consist predominantly of larch, pine, and spruce conifers, with the remaining third mainly sycamore, beech and oak.
The hills of the Peak District are given over to the pasture of sheep, leased to local farmers. The moorlands and gritstone edges are criss-crossed by footpaths open year-round other than during selected shooting periods.

Dambusters

During the Second World War the reservoir was used by pilots of the 617 Squadron for practising the low-level flights needed for Operation Chastise (commonly known as the "Dam Busters" raids), due to its similarity to the German dams. Occasional flypasts of the Battle of Britain Memorial Flight are staged to commemorate this.

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