River Ryton
Encyclopedia
The River Ryton is a tributary of the River Idle
River Idle
The River Idle is a river in Nottinghamshire, England. Its source is the confluence of the River Maun and River Meden, near Markham Moor. From there, it flows north through Retford and Bawtry before entering the River Trent at Stockwith near Misterton...

. It is formed from a series of tributaries but begins at Lindrick Common in the Metropolitan Borough of Rotherham
Metropolitan Borough of Rotherham
The Metropolitan Borough of Rotherham is a metropolitan borough of South Yorkshire, England. It is named for its largest town, Rotherham, but also spans the outlying towns of Maltby, Rawmarsh, Swinton, Wath-upon-Dearne, as well as a suburban and rural element composed of hills, escarpments and...

, South Yorkshire
South Yorkshire
South Yorkshire is a metropolitan county in the Yorkshire and the Humber region of England. It has a population of 1.29 million. It consists of four metropolitan boroughs: Barnsley, Doncaster, Rotherham, and City of Sheffield...

, 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...

. Most of its course is in Nottinghamshire
Nottinghamshire
Nottinghamshire is a county in the East Midlands of England, bordering South Yorkshire to the north-west, Lincolnshire to the east, Leicestershire to the south, and Derbyshire to the west...

, flowing through the town of Worksop
Worksop
Worksop is the largest town in the Bassetlaw district of Nottinghamshire, England on the River Ryton at the northern edge of Sherwood Forest. It is about east-south-east of the City of Sheffield and its population is estimated to be 39,800...

. It meanders northwards to join the River Idle near the town of Bawtry
Bawtry
Bawtry is a small market town and civil parish which lies at the point where the Great North Road crosses the River Idle in the Metropolitan Borough of Doncaster in South Yorkshire, England. Nearby towns include Gainsborough to the east, Retford south southeast, Worksop to the southwest and...

 on the South Yorkshire-Nottinghamshire border.

While much of its route is rural, its course through Worksop is man made, a result of development and milling. It used to flow through Scrooby, where there was a mill, but was diverted northwards in the 1960s. It supplies water to the Chesterfield Canal through two feeders, and a number of the bridges which cross it are of interest architecturally, which has resulted in them becoming Listed structures.

The water quality of the river is moderate, as a considerable proportion of the total flow is supplied by the processed water from sewage treatment works. Despite this, there are significant populations of fish in the river, and it is used for organised angling.

Hydrology

The region through which the river flows is underlaid by an extensive water-bearing porous rock structure called the Magnesian Limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

 aquifer
Aquifer
An aquifer is a wet underground layer of water-bearing permeable rock or unconsolidated materials from which groundwater can be usefully extracted using a water well. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology...

, which is near the surface in the west and dips downwards to the east. Magnesian Limestone is so called because it contains quantities of the mineral Dolomite
Dolomite
Dolomite is a carbonate mineral composed of calcium magnesium carbonate CaMg2. The term is also used to describe the sedimentary carbonate rock dolostone....

, which is rich in Magnesium
Magnesium
Magnesium is a chemical element with the symbol Mg, atomic number 12, and common oxidation number +2. It is an alkaline earth metal and the eighth most abundant element in the Earth's crust and ninth in the known universe as a whole...

. The Triassic
Triassic
The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...

 Sherwood Sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...

 aquifer is another porous rock layer which covers this to the east, and is the major geological component of the area. Further east, they are both covered by a layer of Mercia Mudstone
Mudstone
Mudstone is a fine grained sedimentary rock whose original constituents were clays or muds. Grain size is up to 0.0625 mm with individual grains too small to be distinguished without a microscope. With increased pressure over time the platey clay minerals may become aligned, with the...

. Where these aquifers reach the surface, they often supply water to the river system, but can also take water from it. This is affected by the extraction of groundwater, particularly for public water supply, and by fracturing of the aquifers as a result of subsidence caused by deep coal mining.

The Ryton draws its water from the Anston Brook, the Pudding Dyke, the Bondhay Dyke, and to a lesser extent the Broadbridge Dyke. Prior to the construction of the Chesterfield Canal in the 1770s, the flow of the Broadbridge Dyke was much greater, but water from its catchment area was diverted to form the reservoirs at Pebley and Harthill, which supply the canal. Overflow from the reservoirs reaches the Ryton by the Pudding Dyke, but the river also supplies water to the canal via the Brancliffe feeder and the Kilton feeder. The natural water sources are supplemented by the outflows from Dinnington and Anston Sewage Treatment Works into the Anston Brook, which together provide about 7 Ml/d (megalitres per day), while Kilton Treatment Works supplies about 12.8 Ml/d. At Manton, excess flow from the canal tops up the river, and water pumped from Manton Colliery formerly performed the same function. With the closure of the mine, a new borehole was constructed in 2004, and water is pumped from the Sherwood Sandstone aquifer into the river. The borehole is operated by Severn Trent Water.

In order to monitor flows on the river, the Environment Agency maintain gauging stations, one to the east of Worksop and a second to the east of Blyth. They also have one on Oldcotes dyke, just below Blyth Old Bridge. The catchment area above the Worksop gauging station is 29.7 square miles (76.9 km²) and the mean flow is 8.55 million gallons (38.88 Megalitres) per day. The catchment receives 25.8 inches (655.3 mm) of rainfall in an average year. Oldcoates Dyke contributes 12.92 million gallons (58.75 Ml) per day, and the flow at the Blyth gauging station amounts to 28.89 million gallons (131.3 Ml) per day, derived from a catchment area of 89 square miles (230.5 km²). This station has been operational since 1984. Previously, there was a gauging station a little further downstream at Serlby Park, but this was decommissioned in 1978, as the flow readings in the summer were not reliable. Data from the Blyth station is transmitted to the pumping station at West Stockwith, where it is used to control discharges from the River Idle
River Idle
The River Idle is a river in Nottinghamshire, England. Its source is the confluence of the River Maun and River Meden, near Markham Moor. From there, it flows north through Retford and Bawtry before entering the River Trent at Stockwith near Misterton...

 into the River Trent
River Trent
The River Trent is one of the major rivers of England. Its source is in Staffordshire on the southern edge of Biddulph Moor. It flows through the Midlands until it joins the River Ouse at Trent Falls to form the Humber Estuary, which empties into the North Sea below Hull and Immingham.The Trent...

.

Course

The River Ryton starts at the western edge of Lindrick Common, close to the 198 feet (60.4 m) contour, where Anston Brook, flowing in from beyond Anston to the west, and Pudding Dyke, flowing northwards from Thorpe Salvin, join. Shortly afterwards, the Brancliffe feeder leaves the river, following an 'S' shaped course to supply water to the Chesterfield Canal
Chesterfield Canal
The Chesterfield Canal is in the north of England and it is known locally as 'Cuckoo Dyke'. It was opened in 1777 and ran 46 miles from the River Trent at West Stockwith, Nottinghamshire to Chesterfield, Derbyshire...

 near Turner Wood locks. A little further east, it crosses under the Sheffied to Lincoln Railway line
Sheffield to Lincoln Line
The Sheffield to Lincoln line is a railway line in England. It runs from Sheffield east to Lincoln via Worksop, Retford and Gainsborough Lea Road. The route comprises the main line of the former Manchester, Sheffield and Lincolnshire Railway, to Gainsborough, Trent Junction, where it then follows...

 and through a three-arched aqueduct below the Canal, to pass through Shireoaks
Shireoaks
Shireoaks is a former pit village in Nottinghamshire, located between Worksop and Thorpe Salvin.The Chesterfield Canal and River Ryton both run through the village...

. It then loops around the village of Rhodesia
Rhodesia, Nottinghamshire
Rhodesia is a village and parish located in the county of Nottinghamshire, in central England. The village lies 20 miles from Sheffield and is a part of the Sheffield city region. It was named after the erstwhile Chairman of the nearby Shireoaks Colliery, G. Preston Rhodes.Rhodesia is a small...

, crossing under the Worksop to Nottingham railway
Robin Hood Line
The Robin Hood Line is a railway line running from Nottingham to Worksop, Nottinghamshire. The stations between Shirebrook and Whitwell are in Derbyshire.The towns and villages served by the route are listed below:*Nottingham*Bulwell*Hucknall...

 line and the A57 Worksop bypass
A57 road
The A57 is a major road in England. It runs east from Liverpool to Lincoln, via Warrington, Cadishead, Irlam, Patricroft, Eccles, Salford and Manchester, then through the Pennines over the Snake Pass , around the Ladybower Reservoir, through Sheffield and past Worksop...

 to arrive on the western edge of Worksop.

In Worksop, the river was used to power mills for centuries. Three water mills were mentioned in a survey carried out in 1636, one near the present junction of Westgate and Newcastle Avenue, one called Priory Mill, and a third called Bracebridge mill. All had ceased to operate by 1826, but a new water mill had been constructed further to the west, near to the present junction of Newcastle Avenue and the A57 Worksop bypass. It was known as Beard's mill, after its owner Mr. Joseph Beard, and the mill pond was a hive of activity, being used as a skating rink in winter, and for fishing at other times of the year. More exotic activity recorded includes demonstrations of the launching of a lifeboat, and the bathing of elephants when travelling circuses visited the town. The mill building lasted until 1985, when it was demolished to make way for the Worksop bypass.

The course of the Ryton through Worksop is largely man-made. It originally flowed much nearer to Castle Hill, probably forming part of the defences, but was diverted in 1842 into a channel further north when the 4th Duke of Newcastle constructed Newcastle Street, in order to develop that part of the town. The river is then culverted as it passes under a shopping complex and the shops of Bridge Street. This section counts as a confined space, and was surveyed in 2007, in a joint venture between the Environment Agency, a team of divers, and Bassetlaw District Council. Some five tons of debris, half a ton of steel, and some stolen goods were removed from the culvert during the exercise. Beyond Watson Road bridge, sluices and extra channels point to the existence of the mill near the Priory. Priory Water Mill was in use from the medieval period until 1876, and a large lake called the Canch was formed in 1820, by constructing a dam across the leat which fed it. The Canch gradually became polluted, and was filled in when milling ceased in 1876. The buildings were utilised by William Bramer and Sons for their business of making chairs until they burnt down in 1912, and the site has more recently become the location of a sensory garden. Three channels continue under Priorswell Road through separate bridges, cross Bracebridge field, and join up again near the old High Hoe Road bridge.

Continuing under the new High Hoe Road bridge, the river passes the derelict Grade II listed Italianate pumping station built in 1881 to pump sewage away from Worksop, before passing under the Chesterfield Canal again, through a 3-arched aqueduct. A feeder, which is at a higher level, passes under the canal through a culvert, and joins the canal through a sluice just below Kilton lock, after which the river and canal run parallel, until they pass through separate arches of a nine-arched viaduct which carries the Sheffield to Lincoln Railway line, opened in 1849. The river then follows a winding course through the estate of Osberton Hall and the village of Scofton, turning north to skirt the western edge of Ranby
Ranby, Nottinghamshire
Ranby is a small village in the north of Nottinghamshire, next to the Chesterfield Canal and adjacent to the A1. It is known for its two schools, the prep school Ranby House and the primary school Ranby Primary School, and the nearby church All Saints Babworth.Ranby Prison is located on the A620 to...

. Ranby Chequer Bridge marks the point at which the river, having flowed eastwards for most of its course, turns to the north west. The bridge itself can be reached from Ranby village by a footpath which runs along the central reservation of the A1 road for a short distance. The next major crossing is the B6045 at Hodsock Red Bridge, its three arches constructed of red bricks with stone lining, after which an early 19th century Grade II listed twin-arched bridge carries the drive to Hodsock Priory over the river.
Then comes the A634 to the west of Blyth. The bridge here has three arches, was built for William Mellish of Blyth Hall around 1770, probably by the architect and bridge designer John Carr of York, and is a Grade I listed structure. Despite its age, it is called Blyth New Bridge, to distinguish it from Blyth Old Bridge which carries the same road over Oldcotes Dyke, a little further to the west. Before the next crossing of the B6045, the river is joined by Oldcotes Dyke, which flows eastwards from Roche Abbey
Roche Abbey
Roche Abbey is a now-ruined abbey located near Maltby, South Yorkshire, England. It is situated in a valley alongside Maltby Beck and King's Wood.-Early history:...

, and drainage of the surrounding flood plain from here to the Idle is managed by the Rivers Idle and Ryton Internal Drainage Board
Internal Drainage Board
An internal drainage board is a type of operating authority which is established in areas of special drainage need in England and Wales with permissive powers to undertake work to secure clean water drainage and water level management within drainage districts...

. A network of drainage channels accompany the river from here to the junction with the River Idle, passing under the A1 road, collecting the runoff from the drainage channels of Whitewater Common, and skirting Serlby and Scrooby. To the north of Scrooby, the channel passes under the A638 Great North Road, the road into Scrooby village and the East Coast Main Line
East Coast Main Line
The East Coast Main Line is a long electrified high-speed railway link between London, Peterborough, Doncaster, Wakefield, Leeds, York, Darlington, Newcastle and Edinburgh...

 railway, crossing the 16 feet (4.9 m) contour at the railway bridge. The Great North Road bypassed Scrooby, passing to the west of the village, when it was reconstructed as a turnpike road in 1776. The construction included a number of brick arches, to allow the Ryton to flow under it even in times of flood, which can still be seen from Mill Lane. The river used to flow through the village, and powered Scrooby water mill, an 18th century mill which was used to grind corn. Milling stopped in 1939, and the river was diverted to follow its present course further to the north in the 1960s. Beyond the railway, flood banks have been raised on both sides of the channel until it meets the River Idle just above Bawtry bridge, the limit of navigation on that river.

Fauna

In order for wildlife, particularly fish, to thrive, the quality of the water needs to be good. The Environment Agency use a six stage rating scale, from 'A' to 'F', called the General Quality Assessment, to classify rivers. 'A' on the GQA is the best quality of water, while 'F' is the poorest. Factors which affect the quality are levels of ammonia, levels of dissolved oxygen and the Biochemical oxygen demand
Biochemical oxygen demand
Biochemical oxygen demand or B.O.D. is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. The term also refers to a chemical procedure for...

 (BOD), which measures the amount of dissolved oxygen needed by organisms to break down organic matter in the water. These factors are generally worse when the water is discharged from sewage treatment processes, and tend to be worse in summer, when such discharges make up a greater proportion of the total flow in the river. Water quality has steadily improved as a result of investment in the treatment processes, funded by the water industry's Asset Management Plan. Good flows help the water to purify itself. The upper Ryton is rated at 'B' on the GQA scale, and Oldcotes Dyke is rated at 'C'.

The river Ryton supports various types of fish. Very few live in the upper reaches, including the Anston Brook, because the water is only of moderate quality. A number of small streams contribute to the improvement of water quality, so that wild brown trout thrive as far as Worksop. Some trout and various types of cyprinids inhabit the water below Worksop, although abstraction of water results in spawning grounds and the habitats where the young fry live drying out during most summers, which has resulted in a decline in their numbers. Nevertheless, the lower reaches are still used for organised angling, and are the only part of the River Idle system where this activity takes place.

Points of interest

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