appendix a - National Grid

3 CONTEXT AND SCOPE OF WORK
TEP on behalf of National Grid 3 of 21
King’s Lynn 400kV Connection
110488-FRA-R1(1)
A key element of project development is to prepare a Flood Risk Assessment (FRA) to
establish the risk associated with the proposed development and to proposed suitable
mitigation measures, if required, to reduce the risk to a more acceptable level.
The EA considers that because the site falls within Flood Zone 3, for the development
to accord with PPS25, a FRA is required to demonstrate that the Exception test can be
passed.
The scope of work relating to a FRA is based on the guidance provided in PPS25 and
(Ref. 3)
the accompanying guidance published by the Communities and Local
Government Office and comprise of the following elements:
• To obtain information on the hydrology and hydrological regime in and around
the site.
• To obtain the view of the EA including scope, location and impacts.
• To determine the extent of new flooding provision and the influence on the site.
• To review site surface water drainage based on the proposed layout. To
determine the extent of infrastructure required.
• To review architect plans and planning information and other studies to
determine the existing site conditions.
• To assess the impact on the site from climate change effects and anticipated
increase in rainfall over the lifetime of the development.
• Preparation of a report including calculations and summaries of the source
information and elements reviewed.
Appendix B of this report includes Annex ‘E’ of PPS25, together with the scope of
Drainage Impact Assessment is described in Interim Code of Practice for Sustainable
Drainage Systems (ICPSDS) (Ref.2) .