Nine Wells

Nine Wells
Type	Local Nature Reserve
Location	Trumpington, Cambridgeshire
OS grid	TL 461 542
Area	1.2 hectares
Managed by	Cambridge City Council

Nine Wells is a 1.2 hectare Local Nature Reserve east of Trumpington, on the southern outskirts of Cambridge. It is owned and managed by Cambridge City Council.

The site is a small area of woodland surrounded by agricultural land. Multiple springs issue from the base of a chalk hill, and feed Hobson's Conduit, the watercourse that was built between 1610 and 1614 by Thomas Hobson and other benefactors to bring fresh water into the city of Cambridge. There are four main springheads linked by stream channels, as well as innumerable minor fissures, that issue water at a constant 10.2 °C.

In 1265 a defensive channel known as 'the king's ditch' was excavated around the city of Cambridge. By the early 17th century this ditch had become an open sewer. In 1574 Andrew Perne DD, Master of Peterhouse, thought of constructing a channel to bring water to the ditch. Hobson's Conduit, constructed from 1610, used the natural springs at Nine Wells to create a flow of water to the city and flush the kings ditch. This was not only successful in sanitising the city but it became the principal water supply for Cambridge for over 250 years. Water continues to flow into the city and waters the lake in the Botanic Gardens.

The dominant trees here are beech which were originally planted for firewood but have a detrimental affect on the watercourses: an acidic acid leaf fall in autumn is causing heavy silting and a change in oxygen levels. The hedgerow that encloses the reserve was planted following the Enclosures Act of 1834 and comprises native species like hawthorn, spindle and field maple. A survey determined that 108 plant species grow here and the area contains numerous mature ash trees as well as blackthorn. Scented sweet violets (Viola odorata) and bluebells bloom there early in the year, and later there are cowslips and deadly nightshade.

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