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2017 Selsey Haven Technical Key Issues and Preliminary Business Case

2017 Selsey Haven Technical Key Issues and Preliminary Business Case

Technical Key Issues Study 2017

Produced by Royal Haskoning DHV

Selsey Haven Key Issues Study

Appendix A - Preliminary Consultation Report

Appendix B - Consultation Documents; Consultation; Cross Section; Location Plan; Site Plan

Appendix C - Consultation Feedback

Appendix D - Preliminary Business Case, Vail Williams

Appendix E - Ground Condition Sketches

Appendix F - Revised Concept Design - Site Plan

Appendix G - Revised Layout Consultation Feedback

Recommendations are summarised as follows:

Recommendation 1: Sediment transport. Review forthcoming Regional Shingle Sediment Budget: Selsey Bill to Brighton Marina (2013) to reinforce our understanding of sediment transport.

Recommendation 2: Beach Bypassing. Undertake numerical modelling to optimise the concept layout of the haven entrance, and haven position, and to provide evidence over the potential impact of the haven on sediment transport.

Recommendation 3: Proximity to residential area. The lawful use of East Beach Green should be established prior to determining any alternative concept options / layouts. This will identify whether the haven can move to a more land based option and the likely impacts and objections from Chichester District Council. It has been noted that any loss of public amenity value should be compensated for.

Recommendation 4: As part of the above determine an optimised maintenance beach bypassing regime with a view of minimising operational costs.

Recommendation 5: Identify whether the Haven can be relocated onto East Beach Green and the likely impacts and objections from Chichester District Council.

Recommendation 6: Further work should be taken to increase the accuracy of the beach bypassing and dredging figure.

Vail Williams

The Haven should be capable of achieving a minimum of £150,000 per year. It is recommended that the costs of beach bypassing and dredging operations are no more than £100,000 per annum in order to ensure the long term viability of the haven.

Current estimated maintenance costs are of the order of £150,000 per annum, and further work should be undertaken to increase the accuracy of this figure and reduce it as far as is reasonably practicable.