The River Mimram is a
chalk stream
Chalk streams are rivers that rise from springs in landscapes with chalk bedrock. Since chalk is permeable, water easily percolates through the ground to the water table and chalk streams therefore receive little surface runoff. As a result, th ...
in
Hertfordshire
Hertfordshire ( or ; often abbreviated Herts) is a ceremonial county in the East of England and one of the home counties. It borders Bedfordshire to the north-west, Cambridgeshire to the north-east, Essex to the east, Greater London to the ...
, England. It runs from its source near Whitwell in Hertfordshire to join the
River Lea
The River Lea ( ) is in the East of England and Greater London. 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 Cr ...
at Hertford.
Geography
The River Mimram rises from a
spring to the north-west of
Whitwell, in North
Hertfordshire
Hertfordshire ( or ; often abbreviated Herts) is a ceremonial county in the East of England and one of the home counties. It borders Bedfordshire to the north-west, Cambridgeshire to the north-east, Essex to the east, Greater London to the ...
,
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
. At Whitwell there are
watercress
Watercress or yellowcress (''Nasturtium officinale'') is a species of aquatic flowering plant in the cabbage family, Brassicaceae.
Watercress is a rapidly growing perennial plant native to Eurasia. It is one of the oldest known leaf vegetabl ...
beds which have existed since Roman times and these are fed by the same springs. The valley extends northwards where it becomes known as
Lilley Bottom. Other sections of the valley are known as
Kimpton Bottom and
Codicote Bottom.
After flowing through Whitwell, Kimpton Mill (where the Mimram is joined by the River Kym) and Codicote Bottom, the river flows through the middle of
Welwyn village before heading between the modern and older
Digswell settlements, and then running cross-country through Panshanger Park, a former gravel quarry, until it reaches the River Lea at
Hertford
Hertford ( ) is the county town of Hertfordshire, England, and is also a civil parish in the East Hertfordshire district of the county. The parish had a population of 26,783 at the 2011 census.
The town grew around a Ford (crossing), ford on ...
.
Although a dry valley to the north, it has been known in particularly wet years for the River Mimram to be extended for several miles by springs in the upper valley. In 2001, in a neighbouring valley to the west a village was flooded. The Valley is the furthest east of all the
Chiltern Hills
The Chiltern Hills or the Chilterns are a chalk escarpment in southern England, located to the north-west of London, covering across Oxfordshire, Buckinghamshire, Hertfordshire and Bedfordshire; they stretch from Goring-on-Thames in the south- ...
valleys.
Historical References
The name of the Mimram is one of the few toponyms recorded within its local area prior to the compilation of the Domesday Book in 1086. The
Anglo-Saxon Chronicle
The ''Anglo-Saxon Chronicle'' is a collection of annals in Old English, chronicling the history of the Anglo-Saxons.
The original manuscript of the ''Chronicle'' was created late in the ninth century, probably in Wessex, during the reign of ...
described the building of a burh (a fortified town) at Hertford in 913: "betweox memeran and beneficcan and lygean" (one manuscript spells "memeran" as "maran", and another gives "mæran"), meaning "between the Mimram/Maran and the Beane and the Lea’. On old maps of Hertfordshire, the river is named both as the Mimram and the Maran, with local residents in the 20th century still referring to the surrounding area as the Maran Valley.
Etymology
The name "Mimram" is typically believed to be of Celtic origin. Rutherford Davis states "etymology unknown, but there is little reason to doubt it is Celtic". Etymological connections have been suggested by academic philologists with the River Mint in Westmorland and with North Mymms in south Hertfordshire. There have been suggestions of it being named after a Celtic deity, though no academic sources have been cited for this and the speculation probably stems from a comparison with etymology for the nearby
River Beane
The River Beane is a short river in the county of Hertfordshire, England. A tributary of the River Lea, it rises to the south-west of Sandon, Hertfordshire, Sandon in the hills northeast of Stevenage and joins the Lea at Hartham Common in Hert ...
. Generally, etymologists and philologists have found the name 'Mimram' hard to analyse as there has been so little raw material on which to work until well into the Saxon era, by which time multiple forms of the name appear in records.
Eilert Ekwall believes the Old English version of the name was ''Memere'' or ''Mere'' (''Mære''), and that, given the dubious nature of early forms, no etymology can realistically be attempted.
Archaeologist Keith Fitzpatrick-Matthews has written
that the Mimram's name is meaningless in Old English and therefore must have Brittonic origins. He writes:
Historically, the river has also been known by the name "Maran" and many maps from the nineteenth and early twentieth centuries mark the river's name as "Mimram or Maran". Indeed, up until the 1960s and 1970s, most local residents referred the area around it as the ''Maran Valley'' rather than the ''Mimram Valley''. Downstream in Digswell there is a homestead property dating from the sixteenth century that has the name "Maran House". It has been speculated
Quiet Flows the…?
/ref> that "Maran" may hark back to the homelands of the Catuvellauni
The Catuvellauni (Common Brittonic: *''Catu-wellaunī'', "war-chiefs") were a Celtic tribe or state of southeastern Britain before the Roman conquest, attested by inscriptions into the 4th century.
The fortunes of the Catuvellauni and thei ...
tribe, the Celts who came to Hertfordshire from a region of modern-day Belgium and Northern France where the main river is the Marne, after which a whole department of France is named. The prefecture of Marne is Châlons-en-Champagne
Châlons-en-Champagne () is a city in the Grand Est region of France. It is the capital of the Departments of France, department of Marne (department), Marne, despite being only a quarter the size of the city of Reims.
Formerly called Châlons ...
, formerly called Châlons-sur-Marne - with the name "Châlons" being etymologically derived from the name of the local Belgic tribe of the Catalauni
The Catalauni (Gaulish: *''Catu-uellaunoi'' 'war-chiefs') were a Belgic tribe dwelling in the modern Champagne region during the Roman period. The Catalauni probably belonged to a larger tribe, either the Remi in the north or the Lingones in th ...
. However, the link between the French Catalauni and the British Catuvellauni is not categorically proven: some texts assume they are connected (including, recently, Graham Robb's "The Ancient Paths"), while others infer a lack of connection from the lack of proof.
Crossings
The Mimram is crossed at Digswell by the Digswell or Welwyn Viaduct, carrying the East Coast Main Line
The East Coast Main Line (ECML) is a electrified railway between its northern terminus at and southern terminus at . The key towns and cities of , , , , and are on the line. The line is a key transport artery on the eastern side of Grea ...
as well as commuter services to Peterborough and Cambridge, as it spans the entire width of the Maran Valley.
The upper reaches of the Mimram are crossed only occasionally by small road bridge or fords (eg at Welwyn and Codicote Bottom). Welwyn Village's three bridge are at Singlers Bridge, on the High Street (previously a ford), and on Mill Lane. The High Street and Mill Lane bridges are relatively recent, making Singlers Bridge the only early bridge within Welwyn. Singlers Bridge is named after Singlers Marsh, which was originally named Single Bridge Mead in the 18th century tithe maps, presumably acknowledging its status as accommodating the only bridge across the Mimram in the area.
Below Welwyn, the river goes into a culvert under the by-pass road and the motorway alongside it, before emerging at Lockleys Park and flowing alongside the road through Tewin Water towards Panshanger Park.
Literary references
The river is the subject (and speaker) of a Stevie Smith poem, ''The River God''. Popular and enjoyable though this poem has been for its many readers, the description of the river in the poem bears little relation to the geography of the actual Mimram.
References
External links
North Herts Council Landscape assessment
River Mimram home page at River Lea Catchment Partnership
Further reading
*
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Mimram, River
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