River Mimram
From Wikipaddle
The Mimram Valley is named after the River Mimram, which rises from a spring to the north of Whitwell, in North Hertfordshire, UK, and makes its confluence with the River Lea near Horn's Mill in Hertford. At Whitwell there are Cress beds which have exsisted since Roman times and these are fed by the same springs. The Valley extends northwards where it becomes know as Lilley Bottom.
Although dry it has been known in particulary wet years (2001) for the River Mimram to be extended for several miles by springs in the upper valley, in a neighbouring valley to the west a village was flooded. The Valley is most far east of all the Chiltern Hill valleys.

