Mimmshall Brook
Mimmshall Brookis a 9.8 kilometres (6.1 mi)[1]longstream(brook) inGreater LondonandHertfordshire,England. Rising from two sources—one inHertsmere,Hertfordshire, and the other inArkley,London Borough of Barnet—the brookdrainsinto acatchment areaof 52 km2(20 sq mi) atWater End Swallow Holes,Welham Green,North Mymms.It is atributaryof theRiver Colne.
Course
[edit]The Mimmshall Brook rises from two sources—Saffron Green Meadowsin the borough ofHertsmere,Hertfordshire, and nearArkley Lane and PasturesinArkleyin theLondon Borough of Barnet.The Saffron stream flows east to meet the northbound Arkley stream at Saffron Green Meadows. From there, Mimmshall Brook flows a northeasterly course untilDyrham Park,when it turns north. It then flows intoDancers Hilland under an unnamedgrade II listedbridge[2]before flowing under theM25 motorway(London Orbital Motorway) via aculvert.From here, the Mimmshall Brook flows throughWash Lane Commonin thecivil parishofSouth Mimms.There, it receives the waters of Clarehall Brook and Bentleyheath Brook. It then receives the waters ofPotters Bar Brookat Mymms Hall Livery Stables, beforedraininginto acatchment areaof 52 km2(20 sq mi) atWater End Swallow Holes,Welham Green,North Mymms.It is from these sinkholes that theRiver Colnerises.[3][4][5]
References
[edit]- ^"HA16 Rivers and Streams"(PDF).London Biodiversity Partnership.p. 3.Retrieved11 September2022.
- ^Historic England."Bridge over the Mimmshall Brook (1174684)".National Heritage List for England.Retrieved11 September2022.
- ^"Wash Lane Common: Action Plan 2017–2022"(PDF).Hertsmere Borough Council.January 2017. pp.12–13, 18.Retrieved11 September2022.
- ^"Herefordshire" (Map).The Council.Hertfordshire County Council.17 May 2021.Retrieved11 September2022.
- ^Maurice, L; Bunting, S; Farrant, A; Mathewson, E (2020).BGS Karst Report Series: C4. Karst in the Chalk of the Chilterns and the Berkshire and Marlborough Downs(PDF).British Geological Survey(Report). BGS Karst Report Series. p. 6.Retrieved11 September2022.
External links
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