Bentley Brook
Encyclopedia
Bentley Brook is a stream located in Derbyshire
Derbyshire
Derbyshire is a county in the East Midlands of England. A substantial portion of the Peak District National Park lies within Derbyshire. The northern part of Derbyshire overlaps with the Pennines, a famous chain of hills and mountains. The county contains within its boundary of approx...

, England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. It rises at Matlock Moor, flowing south through Cuckoostone Dale, under the A632, into Lumsdale, gathering the valley's waters--notably from Knabhall Brook, out of Tansley
Tansley
Tansley is a village on the southern edge of the Derbyshire Peak District, two miles east of Matlock.-History:Tansley is recorded in the Domesday Book as Tanslege, and its name comes from the combination of the Old English words lega, meaning "wood or glade" and tan meaning "a branch of a...

, itself dammed and supporting large mills. In Lumsdale it enters a now disused mill pond or reservoir, then flows over a waterfall in the course of passing several historical mill ruins. Finally, it runs through control gates into the outside bend of a tight oxbow of the River Derwent
River Derwent, Derbyshire
The Derwent is a river in the county of Derbyshire, England. It is 66 miles long and is a tributary of the River Trent which it joins south of Derby. For half its course, the river flows through the Peak District....

, just beyond Hall Leys Park
Hall Leys Park
Hall Leys Park is a Victorian public park in the centre of Matlock, Derbyshire which opened in 1898. It lies between the River Derwent to the south and Causeway Lane to the north....

 in Matlock. Although only about five miles in length, Bentley Brook is classed as a 'main river' by the Environment Agency
Environment Agency
The Environment Agency is a British non-departmental public body of the Department for Environment, Food and Rural Affairs and an Assembly Government Sponsored Body of the Welsh Assembly Government that serves England and Wales.-Purpose:...

.

Water mills

The Brook, formerly called "Lums", flows through the wooded gorge of Lumsdale Valley and is notable for being the site of six now disused water wheels and three mill ponds - "perhaps the most concentrated evidence of early water power in Great Britain
Great Britain
Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

." The power of the stream was harnessed by generations of mills in the valley, operating over several centuries. In now overgrown ruins, Bone Mill can be dated to the 16th century, and was used to grind animal bones for fertiliser up to the 1920s. Its wheel pit still remains, as does the tailrace leading back into Bentley Brook. Past the Pond Cottages (originally for lead smelting) and a footbridge is a picturesque pond, held by the Lower Dam, which was built in 1830 to harness the Brook. This stone-lined reservoir features a central drain plug. From high on its dam wall, a still-visible metal pipe conducted water to the wheel of the adjacent, second mill, dating from 1850, and still functioning as a sawmill at the turn of the 20th century. Visible below that and near the path, is a millstone imported from the Massif Central
Massif Central
The Massif Central is an elevated region in south-central France, consisting of mountains and plateaux....

 in France, originally in six sections bound in iron. Next below, now following steps and viewing platforms provided by the Arkwright Society
Arkwright Society
The Arkwright Society is a registered charity engaged in the conservation of industrial monuments in Derbyshire, focusing on the water mills of Lumsdale, Ashford, Cromford and Slinter Wood. It is named after Richard Arkwright who founded the world's first successful water powered cotton spinning...

 in 1989, is "Paint Mill", mainly used to grind white barytes for the paint industry, which has been largely preserved by the Arkwright Society. It was also used to smelt lead, grind corn and bleaching. The fourth mill, beside the Brook's largest waterfall, dates from the 1770s and was used to grind corn and minerals.

Below the falls, a fifth mill on Bentley Brook, known as Upper Bleach Mill, retains remains of its bleaching vats. It was linked to the last of the mills, Garton Mill, by an ingenious train system, carrying heavy loads of cotton between the two. Garton Mill, the largest and most preserved of the six, was built around 1785 by Watts Lowe and Co for cotton
Cotton
Cotton is a soft, fluffy staple fiber that grows in a boll, or protective capsule, around the seeds of cotton plants of the genus Gossypium. The fiber is almost pure cellulose. The botanical purpose of cotton fiber is to aid in seed dispersal....

spinning. Although the water system of the valley was altered to support it, this mill was not a commercial success, the company going bankrupt by 1813. The valley was then sold to John Garton, who converted the mill entirely to bleaching, and thus it functioned, along with other textile finishing mills, into the early 20th century. (A short walking guide for the above, with map, is available online, as are 360 degree moving panoramas.)

The power of Bentley Brook has carved an impressive series of waterfalls from the limestone, and has led to tragedy in the recent past. On December 10, 1965, heavy rain caused major flooding in Derbyshire, leading to three fatalities, including a 58-year-old railway worker, George Ellis, who was found dead in Bentley Brook in Matlock, two days after he had last been seen attempting to cross a flooded car park bordering the Brook. As W. Adam summarized this article in 1861, "We cannot help remarking on the terrible effects produced by this stream, when swollen into a mighty torrent. But of how much utility is this little busy stream in its gentleness, in turning so many mills, giving employment to so many busy hands, and thus in many ways contributing its quota of benefit to the well-being of man."
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