Flood Prevention Measures

The first six months of 2013 have seen a significant increase in flooding of

both tertiary and machine installation. The following proposal sets out how

we will tackle this issue in the short medium and long term

The problem

Point 2External flooding

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Bat 892

Causes - Not under our control

More frequent high intensity storms

Long periods of drought followed by storms leads to all the rain fall passing into the drainage network due to dry compacted ground

Hail stones blocking the drainage network

Contributing factors

Inadequate drainage network

poor design of paved areas

Maintenance

Increase in paved surfaces

Basic design concept for buildings

Actions

Short term In the next 4 to 5 weeks

Establish a list of at risk buildings

An action plan will be agreed between GS-SE, CFRS (CERN Fire & Rescue Service), TSO, and other key stakeholdersTo include:

Drain cleaning

Installation of retention basins to control the water.

Sealing of openings where possible

identifying weak points in the building such as doors cable pits and provision of sand bags to be installed in the event of flood.

Provision of pumps and bagging

List of “volunteers” to assist in the control and clean up in the event of flood (on a best effort basis)

Medium TermYear end

Model the “at risk” areas and identify weaknesses in the network

Campaign of down pipe replacement (putting them on the outside of the buildings)

Modify and repair the drainage network

Long Term

Establish CERN specific design guides for building design and roads and paving