Ok, I understand
Cookie Notice: This site uses cookies. For more information, please see our privacy policy.

St Mary Bourne Parish Council

Ground water information & flooding

The Flood & Emergency Group of the parish council monitors groundwater information at various points through the parish and the published data from the borehole at Vernham Dean.

Groundwater levels are high and the river is flowing well through the parish.  The Environment Agency deployment trigger point has been reached (level measured at the Holdway Cottages gauge is over 78.5m) and they have deployed the flood barrier at Spring Hill Lodge.

Please contact the parish office if you have any questions or concerns about the situation.  The parish council does have a small stock of sandbags available to help protect vulnerable residents in the most vulnerable homes if the situation worsens, and can get more from Basingstoke and Deane Borough Council if widespread problems develop.  You should read through the guidance below on what practical actions you can take to prepare if your home is at risk of ground water flooding.

There are currently an Environment Agency flood alert in place as follows:

Flood Alert in force: Groundwater flooding in Vernham Dean, Upton and the Bourne Valley, updated Monday 23 March.

Flooding is possible for: Communities at risk of groundwater flooding in Vernham Dean, Upton and the Bourne Valley in North Hampshire including Hurstbourne Tarrant and St Mary Bourne.   

Be prepared.

At Vernham Dean and Upton, the groundwater is high, but levels are finally beginning to fall. At Vernham Dean, the current rate of fall is around 8cm per day, at Upton it is much less, falling by 1 cm every few days. This week, cellar flooding will continue In Upton, and the sewerage network in St Marybourne will struggle to operate effectively. Over the next 5 days, the weather should remain fairly dry, and levels will continue to fall. Flood impacts will begin to improve, although any improvement, may not be noticeable until next week. We continue to monitor the forecast. Please ensure that any pumps required to protect property can operate. This Flood Alert will be updated by 15:00 on Monday 30/03/2020.

The latest information from the Environment Agency on groundwater can be found here


You can sign up for flood alerts here


The latest data for the ground water levels at the Holdway Cottages gauge can be found here.  This is the site the Environment Agency use as the trigger point for the deployment of their Temporary Defence Deployment Plan (which you can see below)


Here is another useful site presenting the ground water levels at the Holdway Cottages with additional historic data and narrative


The latest data for the ground water levels at Vernham Dean can be found here