What is the level of water – will it be constant, will it cause flooding?
A. The Existing land levels range between 4 and 5m AOD. Front Street being 4.6m AOD at its lowest. Currently there is no form of flood defense in the area. The average spring tide level is 3.29m AOD but Environment Agency predictions suggest that a 200 year extreme event could produce a sea level of 4.7m AOD and a 1000 year extreme event could produce a level of 5.01m AOD. These levels do not take account of the effects of climate change and again using Environment Agency guidance over a 100 year period the general sea level rise might be a further half metre to 5.51AOD. The height of the outer wall of the proposed development together with the height of the lock gate has been designed to withstand an even greater combination of tidal increases. The gate will be 5.8m AOD and the additional wave wall to the seaward side will be 1.1m high.
