River Allen, Northumberland

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River Allen
River Allen, taken from the Cupola Bridge at Whitfield - geograph.org.uk - 5753.jpg
River Allen from the Cupola Bridge
54°55′36″N2°18′50″W / 54.926596°N 2.313870°W / 54.926596; -2.313870
Northumberland UK relief location map.jpg
Red pog.svg
Location within Northumberland
Location
Country United Kingdom
County Northumberland
Physical characteristics
Mouth  
 • coordinates
 54°58′38″N2°18′41″W / 54.9771°N 2.3115°W / 54.9771; -2.3115 Coordinates: 54°58′38″N2°18′41″W / 54.9771°N 2.3115°W / 54.9771; -2.3115
Length5 miles (8 km)
Basin features
River system River Tyne

The River Allen is a river in the English county of Northumberland. The river has its sources in the hills of the Northern Pennines, and is formed by the confluence of the East and West Allen rivers. The Allen is itself, a tributary of the River Tyne. The Allen was formerly very polluted from mining activity upstream, but remediation schemes have been implemented to allow the water quality to improve.

Contents

The river is home to a variety of wildlife including voles and otters.

History

The Allen, which is 5 miles (8 km) long, is a tributary of the River South Tyne. [1] Whilst the derivation of the river name itself is unknown, [2] it gives its name to Allendale and Allenheads. [3] The river is classed as the Allen from a place called Water Meetings, which is just south of Cupola Bridge, a grade II listed structure built in 1778. [4] [5] Upstream of there, the water is formed by the River West Allen and the River East Allen, which are 5.6 miles (9 km) and 14 miles (22 km) respectively. [6] [7]

Allen Valley Angling and Conservation [8] provides permits to fish the River East Allen and supports conservation efforts to improve fish stock and riverside access. The river is home to wild brown trout and visiting spawning sea trout, salmon and otters. [9] Conservation work in 2010 including the removal of weirs that were no longer necessary and the introduction of fish passes to allow the fish further upstream than has been possible since Victorian times. [10] In 2017, voles were released in the upper catchment. [11]

The riverside is noted for its broadleaved woodland and walks through the gorges and valleys that the river flows through. [4] Allen Banks and Staward Gorge is upstream on this river from the confluence with the Tyne. [12] [13] The gorge is evidence of ice streams escaping during the Devensian period, which carved their way through the limestone. [14]

During the winter of 2015/2016, Storm Desmond affected the river with severe flooding, which led to the woodland alongside the river being closed to the public. However, this in turn meant that more wildlife was noted around the river, including red squirrels, roe deer and more otters. [15]

The river has been subjected to pollution from mining activity in the Northern Pennine Orefield; [16] both rivers have had mining activity close to them, with Allen Smelt Mill being located on the south bank of the East Allen. [17] However, further downstream on the River Tyne, the metalliferous pollution has promoted certain types of grasses to grow which thrive on lead and zinc ores in the water. [18]

Catchment and hydrometry

The main river drains an area of 8.1 square miles (21 km2), but with the addition of the West and East Allen rivers, the total area is 50 square miles (130 km2). [1] [6] [7] The water quality ranges from moderate to poor on account of previous mining activity. Due to the amount of water that can be drained into the river, the steep nature of the valley walls and the "impervious geology" of the underlying rock, the river is noted to be a problem for flash flooding, which can lead to inundation problems downstream. [19] [20]

Whilst there no gauging stations on the River Allen, there is one on the East Allen near Allendale. The normal range for the river there is between 7.1 inches (0.18 m) and 1 foot 8 inches (0.52 m) in normal weather conditions. The highest level recorded was in November 2000, when the peak flow was measured at 6 feet 5 inches (1.95 m). [21]

Tributaries

See also

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References

  1. 1 2 "Allen from Source to West Allen". environment.data.gov.uk. Retrieved 2 March 2020.
  2. ↑ Mawer, Alan (1920). The place-names of Northumberland and Durham. Cambridge: Cambridge University Press. p. 3. OCLC   176868326.
  3. ↑ Ekwall, Eilert (1947). The concise Oxford dictionary of English place-names (3 ed.). Oxford: Clarendon Press. p. 6. OCLC   12542596.
  4. 1 2 "Allen Valleys and Allen Banks woodland Travel Guide and Information | Bradt Travel Guides". www.bradtguides.com. Retrieved 2 March 2020.
  5. ↑ Historic England. "Cupola Bridge (Grade II) (1370236)". National Heritage List for England . Retrieved 2 March 2020.
  6. 1 2 "West Allen from Wellhope Burn to Allen". environment.data.gov.uk. Retrieved 2 March 2020.
  7. 1 2 "Allen from West Allen to South Tyne". environment.data.gov.uk. Retrieved 2 March 2020.
  8. ↑ "Allen Valley Angling & Conservation – Information and news about fly fishing and conservation efforts on the River East Allen, Northumberland, North East England". allenvalleyanglers.co.uk. Retrieved 21 November 2016.
  9. ↑ Henderson, Tony (16 January 2015). "Watch: Northumberland otter family captured on film by National Trust". Newcastle Chronicle. Retrieved 21 November 2016.
  10. ↑ "Fish get pass to spawning ground" . infoweb.newsbank.com. 13 February 2010. Retrieved 2 March 2020.
  11. ↑ Henderson, Tony (16 June 2017). "Welcoming the water vole back to our rivers" . infoweb.newsbank.com. Retrieved 2 March 2020.
  12. ↑ bus. "Allen Banks and Staward Gorge". National Trust. Retrieved 15 April 2016.
  13. ↑ Hall, Gemma (2019). Northumberland : including Hadrian's Wall and the coast : local, characterful guides to Britain's special places (2 ed.). Chalfont St Peter: Bradt. p. 299. ISBN   978-1-78477-608-4.
  14. ↑ "Northumberland landscape character assessment: Landscape classification" (PDF). northumberland.gov.uk. Land Use Consultants. August 2010. p. 11. Retrieved 2 March 2020.
  15. ↑ "Walk: Allen Banks, Northumberland". countryfile.com. 26 September 2019. Retrieved 2 March 2020.
  16. ↑ Jarvis, Adam; Mayes, William (2012). "Prioritisation of abandoned non-coal mine impacts on the environment". Future Management of Abandoned Non-coal Mine Water Discharges. Environment Agency (R12): 13. doi:10.13140/2.1.1606.3524.
  17. ↑ Henderson, Tony (20 November 2018). "The beautiful Northumberland landscape which was once a powerhouse of North East industry - How a quiet corner of Northumberland was once the home of a huge smelt mill, producing one tenth of the lead output of the whole of Europe" . infoweb.newsbank.com. Retrieved 2 March 2020.
  18. ↑ "Close House Riverside | Northumberland Wildlife Trust". www.nwt.org.uk. Retrieved 2 March 2020.
  19. ↑ "Northumberland County Council Level 1 Strategic Flood Risk Assessment" (PDF). northumberland.gov.uk. Scott Wilson. September 2010. p. 9. Retrieved 2 March 2020.
  20. ↑ "Tyne Catchment Flood Management Plan" (PDF). assets.publishing.service.gov.uk. Environment Agency. December 2009. p. 22. Retrieved 2 March 2020.
  21. ↑ "River East Allen at Allen Mill Bridge: River level and flood alerts". riverlevels.uk. Retrieved 2 March 2020.
  22. ↑ "OL43" (Map). Hadrian's wall. 1:25,000. Explorer. Ordnance Survey. 2019. ISBN   9780319263624.
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