Slipway Adjacent to Hunstanton Sailing Club, Hunstanton
1. Introduction
The slipway serving Hunstanton Sailing Club has historically relied on a gently sloping sandy foreshore to enable the safe launching and recovery of sailing dinghies and other small watercraft. Over time, however, coastal processes – most notably longshore drift – have resulted in a significant loss of beach material at this location. As the sand has been removed, the underlying carrstone bedrock has become exposed at the foot of the slipway.
This change has created a persistent and growing safety issue. The exposed carrstone surface is uneven, hard, and frequently slippery, making it unsuitable for the launching and recovery of small boats. It increases the risk of slips, trips, and falls for people carrying boats or equipment, causes damage to hulls, centreboards, rudders, foils, and launching trolleys, and presents particular difficulties for junior sailors, older users, and those requiring assisted or adaptive access.
Importantly, this is not a short-term or cyclical problem. Available coastal trend information for the Hunstanton frontage indicates falling beach levels and limited natural replenishment of sand. It is widely recognised that repairing or replacing traditional groynes in this area would not lead to a meaningful or lasting return of beach material. The sand has gone and is unlikely to come back through natural processes.
This proposal therefore does not attempt to restore the historic beach. Instead, it sets out a pragmatic, targeted solution to restore safe access to the water: the creation of a managed, seasonally maintained launch and recovery zone at the foot of the slipway.
2. Purpose and Objectives
The primary objective of this proposal is to improve safety and accessibility at an existing and well-used access point to the sea, without attempting large-scale or speculative coastal intervention.
The specific objectives are to:
- Provide a flat, predictable, and safe surface for launching and recovering sailing dinghies and other small watercraft.
- Reduce the risk of injury and equipment damage associated with the exposed carrstone bedrock.
- Support a wide range of water-based activities, including sailing, windsurfing, paddleboarding, kayaking, and similar non-powered craft.
- Clearly define and manage the area as a working launch and recovery zone, minimising conflict with other beach and promenade users.
- Adopt an approach that is proportionate, maintainable, and compatible with modern adaptive coastal management principles.
3. Overview of the Proposed Scheme
The proposal is for the construction of a small, semi-contained launch and recovery zone located immediately seaward of the slipway. The zone would be formed using low-profile gabion structures and filled with a layered aggregate recharge, topped with sand to create a safe working surface.
The key principle of the scheme is that it accepts ongoing sediment loss as inevitable. Rather than attempting to permanently retain sand in an area where natural processes no longer support it, the scheme is based on planned, predictable seasonal recharge. This allows safety and access to be maintained while keeping costs transparent and controllable.
The diagram below illustrates the concept and layout described below
4. Location and Orientation
- The proposed zone is located directly at the toe of the slipway serving Hunstanton Sailing Club.
- The landward side is bounded by the promenade and Hunstanton Green.
- The seaward side opens onto the intertidal beach and nearshore zone.
- The scheme occupies a square footprint of approximately 50 metres by 50 metres, positioned entirely within an area already affected by beach loss and already used for launching activities.
The proposal does not encroach onto Hunstanton Green, pedestrian routes, or other recreational areas.
5. Structural Elements
5.1 Perpendicular Gabion Groynes (North and South Boundaries)
Two gabion structures are proposed, installed perpendicular to the promenade and spaced approximately 50–60 metres apart. These form the northern and southern boundaries of the zone.
- Each gabion structure would be installed approximately 50 cm below existing ground level and extend to around 1.0 m above the finished surface.
- Their purpose is not to act as traditional beach-building groynes, but to reduce the immediate lateral loss of imported material and to clearly define the launch and recovery zone.
- The use of gabions provides a relatively low-cost, modular, and sacrificial solution appropriate to a managed access area.
5.2 Semi-Submerged Retaining Sill (Western Boundary)
At the western, seaward edge of the zone, a lower gabion structure is proposed to act as a retaining sill.
- This retaining sill would be installed at a height sufficient to retain the recharged aggregate East of the sill (the proposed launching zone)
- There would be an unavoidable 30-50cm drop on the West side of the sill (seaward)
- Its purpose is to retain sand and finer material within the zone while allowing controlled overtopping during higher-energy conditions.
- The low crest height avoids the creation of a hard reflective wall and reduces visual and hydrodynamic impacts.
For safety, the ends of the retaining sill would be clearly marked with high-visibility posts, and permanent signage would warn users of the level change. If required, a tapered access ramp could be incorporated at one corner to further reduce risk.
6. Recharge and Infill Construction
Within the bounded zone, a layered aggregate structure would be constructed to create a stable, permeable, and safe launch surface.
A typical build-up would be as follows:
- A basal layer of large rock (approximately 20–30 cm nominal size) to provide structural stability and prevent punch-through.
- An intermediate layer of cobbles or pebbles (around 10 cm nominal size) to distribute loads and promote drainage.
- A pea gravel layer to provide a transition between coarse material and sand.
- A sand cap forming the working surface for launching and recovery.
This approach creates a permeable “launch pad” rather than an artificial beach, with the sand providing a hull-friendly, barefoot-safe surface while the underlying layers provide stability.
7. Use, Management, and Signage
The zone would be clearly designated as a working area for watercraft launching and recovery only.
- Permanent signage would state that the area is not for sunbathing, sitting, or general beach recreation.
- Additional signage would highlight the presence of the retaining sill and any changes in level.
- The defined boundaries help to reduce conflict between water sports users and other beach or promenade users.
This managed-use approach is central to the proposal and distinguishes it from a general beach nourishment scheme.
8. Relationship to Coastal Processes
The scheme explicitly recognises that longshore drift and broader coastal processes at Hunstanton are unlikely to deliver natural beach recovery at the slipway.
Rather than attempting to interrupt sediment transport or recreate historic conditions, the proposal:
- Accepts that imported sand will disperse over time.
- Designs the zone to slow, but not prevent, material loss.
- Plans for predictable seasonal recharge as a routine maintenance activity.
This aligns with adaptive coastal management principles and avoids the risks and costs associated with trying to permanently hold sand in an unsuitable location.
9. Scale, Visual Impact, and Proportionality
The proposed zone has a footprint of approximately 2,500 square metres. In coastal terms, this is modest in scale and significantly smaller than many existing structures or beach facilities.
- Gabion structures are low-profile and largely buried or submerged for much of the tidal cycle.
- Visual impact from promenade level would be minimal.
- The scheme is confined to an area already degraded by beach loss and already used for launching activities.
- The works are reversible should future policy, funding, or coastal conditions change.
10. Indicative Costs (High-Level Only)
The following figures are intentionally broad, order-of-magnitude estimates. They are provided to support discussion and feasibility assessment only and should not be treated as detailed costings.
10.1 Initial Construction and Full Recharge (“Zero to Hero”)
This stage includes:
- Construction and installation of all gabion structures.
- Site preparation and any necessary excavation.
- Full aggregate and sand recharge to finished levels.
- Initial safety and informational signage.
Assumptions:
- Zone size approximately 50 m × 50 m.
- Average build depth approximately 0.45 m.
- Total infill volume approximately 1,100–1,200 cubic metres.
Very rough indicative capital cost:
£250,000 – £400,000 (one-off)
This reflects the use of mixed aggregates, coastal working constraints, and the bespoke nature of the access solution.
10.2 Annual Recharge and Routine Maintenance
Assuming a notional seasonal loss of approximately 30% of the recharge material:
- Annual replacement volume: approximately 330–360 cubic metres.
- Works limited to topping up and re-grading existing material.
- No new structural construction assumed.
Very rough indicative annual cost:
£30,000 – £60,000 per year
This level of expenditure would typically fund a short, planned maintenance operation carried out outside the main sailing season.
11. Benefits of the Proposal
The proposed managed launch and recovery zone would deliver a number of clear benefits:
- Improved public safety at a known access point.
- Reduced damage to boats and launching equipment.
- Improved accessibility for junior sailors, older users, and those requiring assistance.
- Support for sailing clubs, visiting sailors, and a wide range of non-powered water sports.
- Reduced informal launching from unsuitable areas, lowering conflict with pedestrians and other beach users.
- Predictable, budgetable maintenance rather than reactive responses to an unsafe foreshore.
12. Conclusion and Next Steps
This proposal sets out a practical and proportionate response to a long-standing local problem. It does not seek to alter broader coastal processes or restore historic beach conditions. Instead, it focuses on restoring safe access to the sea through a managed, maintainable, and clearly defined launch and recovery zone.
The scheme is modest in scale, visually unobtrusive, and based on predictable seasonal maintenance. It supports active recreation, water sports, and the continued use of an important coastal facility while aligning with adaptive coastal management principles.
It is requested that Norfolk County Council considers supporting a formal feasibility and pre-application study. Such a study would allow an informed decision to be made on whether this targeted intervention could provide a safe, cost-effective, and sustainable solution for watercraft access at Hunstanton.
Contact : tristanhaskins@gmail.com