Ampney Crucis

The borehole measures water level in the Jurassic Limestones of the southern Cotswolds.

Our enquiries service can help you to access groundwater level data for this well.



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1959 to 2020 1970s 1980s 1990s 2000s 2010s 2020s

Information about the well

Ampney Crucis
Wellmaster ID SP00/62
NGR 4059 2019
Datum 109.52  m AOD
Monitoring details
Type Groundwater Level
Aquifer Middle Jurassic
Confinement Unconfined
Depth 61 m
Monitored by EA Thames
Records commence 1959
Records end Active
Map of Ampney Crucis showing geology

Hydrogeological setting

The borehole measures water level in the Jurassic Limestones of the Southern Cotswolds.

The local geology is Forest Marble over Great Oolite, penetrating into Fuller's Earth.

Water levels generally rest within the Forest Marble, and are unconfined.

Well or borehole construction

The well was drilled at a diameter of 381 mm reducing to 254 mm with depth. The top 13.71 metres are lined with 254 mm diamteer casing.

Hydrograph response

The hydrograph has an annual sinusoidal response, with multiple peaks in resonse to rainfall events during the winter. It is responsive to intense summer rainfall events, and frequently shows its maxima in late spring.

Fluctuations are normally around three metres per annum. A ceiling at just over 103 m AOD may be related to local springs. Water level normally does not drop much below 99 metres, except in exceptional droughts, for instance during 1976 and 1990.

Data issues

IGS records (Institute of Geological Sciences, BGS's former name) suggest that manual readings were taken in 1957 and 1958, but these have not been found.

No data Sept/Oct 1980 and Aug/Nov 1982 due to failure of chart recorder


A preliminary risk assessment of the potential for groundwater flooding during the winter of 2007/8 — an update.


Contact Andrew McKenzie for further information