The Coppermill Stream is a short waterway near

Walthamstow Walthamstow ( or ) is a large town in East London, east London, England, within the Ceremonial counties of England, ceremonial county of Greater London and the Historic counties of England, ancient county of Essex. Situated northeast of Chari ...

in the

Lea Valley The Lea Valley, the valley of the River Lea, has been used as a transport corridor, a source of sand and gravel, an industrial area, a water supply for London, and a recreational area. The London 2012 Summer Olympics were based in Stratford, in ...

. Originally a minor tributary of the

River Lea The River Lea ( ) is in South East England. It originates in Bedfordshire, in the Chiltern Hills, and flows southeast through Hertfordshire, along the Essex border and into Greater London, to meet the River Thames at Bow Creek. It is one of t ...

, the approximately long stream is now used as an aqueduct to transport water from the reservoirs in the Lea Valley to Coppermills Water Treatment Works. The stream is part of a Site of Metropolitan Importance.

Course

Rising close to and fed by water from the

Lockwood reservoir Lockwood Reservoir is located in Walthamstow in the London Borough of Waltham Forest. It is one of the ten Walthamstow Reservoirs, which are part of the Lee Valley Reservoir Chain. The reservoirs supply drinking water to London and are owned ...

, the stream flows in a southerly direction under Ferry Lane A503 and the Gospel Oak to Barking Line and continues between the

Walthamstow Reservoirs Walthamstow Wetlands is a nature reserve in Walthamstow, east London, adjacent to the historic Essex-Middlesex border on the River Lea. It is focused on the Walthamstow Reservoirs, built by the East London Waterworks Company between 1853 and 1 ...

and the

East Warwick Reservoir East Warwick Reservoir is located in the London Borough of Waltham Forest at Walthamstow. The storage reservoir is part of the Lee Valley Reservoir Chain and supplies drinking water to London. The reservoir is owned by Thames Water. History The ...

. It then passes the Coppermill and close to the Coppermills Water Treatment Works. It then flows parallel with Coppermill Lane and skirts the northern edge of

Walthamstow Marshes Walthamstow Marshes, is a biological Site of Special Scientific Interest in Walthamstow in the London Borough of Waltham Forest. It was once an area of lammas land – common land used for growing crops and grazing cattle. In aviation histo ...

, passing under the

Lea Valley Lines The Lea Valley lines are two commuter lines and two branches in north-east London, so named because they run along the Lower Lea Valley of the River Lea. They were part of the Great Eastern Railway, now part of the ''Anglia Route'' of Networ ...

and merging with the

River Lee Navigation The Lee Navigation is a canalised river incorporating the River Lea (also called the River Lee along the sections that are navigable). It flows from Hertford Castle Weir to the River Thames at Bow Creek (England), Bow Creek; its first lock is H ...

at the Lee Valley Marina close opposite Springfield Park.

Coppermill

The stream is named after the Coppermill, a

watermill A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering. Such processes are needed in the production of ...

which was purchased by the British Copper Company in 1808. Before milling copper, the mill can be traced back to the 14th century when it was initially used for grinding corn. In the 1670s it was used in the production of

gunpowder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). ...

, in 1690 for rolling

paper Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distributed ...

. In 1712 it was a

leather Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay. The most common leathers come from cattle, sheep, goats, equine animals, buffalo, pigs and hogs, ...

mill and was next used in the manufacture of

linseed oil Linseed oil, also known as flaxseed oil or flax oil (in its edible form), is a colourless to yellowish oil obtained from the dried, ripened seeds of the flax plant (''Linum usitatissimum''). The oil is obtained by pressing, sometimes followed by ...

. The mill was purchased from the British Copper Company by the

East London Waterworks Company The East London Waterworks Company was one of eight private water companies in London absorbed by the Metropolitan Water Board in 1904. The company was founded by Act of Parliament in 1806, and in 1845 the limits of supply were described as ''" ...

in the late 1850s and was modified to drive a

water pump A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they u ...

to assist in the building of

reservoirs A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including control ...

on the nearby

marshland A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found at ...

. Today it is owned by

Thames Water Thames Water Utilities Ltd, known as Thames Water, is a large private utility company responsible for the public water supply and waste water treatment in most of Greater London, Luton, the Thames Valley, Surrey, Gloucestershire, north Wiltshir ...

Coppermills Water Treatment Works

Towards the southern end of the Coppermill Stream, water is removed for use at the nearby Coppermills Water Treatment Works, operated by

Ecology

The clean flowing stream is home to many species of coarse fish including the

barbel Barbel may refer to: *Barbel (anatomy), a whisker-like organ near the mouth found in some fish (notably catfish, loaches and cyprinids) and turtles *Barbel (fish), a common name for certain species of fish **''Barbus barbus'', a species of cyprinid ...

Recreation

Day tickets are available for

angling Angling is a fishing technique that uses a fish hook or "angle" (from Old English ''angol'') attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated via a fishing rod, although rodless techniqu ...

. Angling information page 12
Retrieved 15 December 2007

References

{{authority control Rivers of London Geography of the London Borough of Waltham Forest Tributaries of the River Lea 1Coppermill