Transforming Visitor Access at Le Pays De La Sagouine
East Coast Docks enhanced visitor experience at Greenwich National Park by creating a durable EZTrail walkway that blends accessibility, safety, and environmental sustainability. Our modular, low-impact design preserves natural habitats while accommodating high traffic. With long-lasting, low-maintenance materials, this innovative project offers a stable, eco-friendly solution that stands up to harsh coastal conditions.
Before: Challenges at Le Pays De La Sagouine
The existing pile-driven pedestrian bridge at Le Pays de la Sagouine exhibited significant structural degradation due to long-term exposure to environmental conditions and material fatigue. Several piles had experienced settlement and deterioration, resulting in uneven load distribution and compromised deck alignment. Despite multiple maintenance interventions, including localized pile reinforcement and decking repairs, the structure could no longer be maintained within acceptable safety or serviceability limits. Engineering assessments concluded that the bridge did not meet current standards for pedestrian load capacity or stability under dynamic conditions. The projected cost of full replacement with a comparable pile-supported structure was prohibitively high, necessitating the evaluation of alternative design solutions that could deliver equivalent functionality, reduced lifecycle costs, and improved resilience in the site’s challenging marine environment.
Designing the Solution: Crafting an Inclusive, Durable Walkway
Solution
A comprehensive replacement strategy was developed to address the unique environmental and logistical challenges presented by the site. The selected system prioritized modularity, seasonal removability, and structural adaptability to withstand the harsh conditions at Le Pays de la Sagouine.
Challenge 1: Significant ice formation and ice movement
The site experiences substantial ice buildup and dynamic ice movement during the winter months, posing a high risk of structural damage to any fixed installation.
Solution: To mitigate ice-related forces, the new dock and bridge system was designed for full seasonal removal. The structure can be efficiently disassembled and removed each fall, preventing exposure to winter ice loads. In spring, the system is reinstalled and realigned to ensure safe and stable pedestrian access for the operating season.
Challenge 2: Limited access for staging and storage
No water-accessible slip or staging area was available near the installation site, complicating both removal and storage logistics.
Solution: A crane-based removal plan was implemented. The dock sections are lifted in segments up approximately 50 feet from the water level to the upper parking area for winter storage. This approach eliminated the need for nearby marine access while maintaining safe and efficient handling procedures.
Challenge 3: Crane capacity limitations
Given the height and reach required for seasonal removal, crane lifting capacity was a critical constraint.
Solution: To ensure the structure remained within safe lifting limits, breakaway joints were integrated every four dock sections. This modular design minimized individual lift weights, improved maneuverability during handling, and reduced stress on connection points during both installation and removal.
Challenge 4: Custom architectural integration
The client requested the addition of custom wood railings to complement the site’s aesthetic and cultural theme.
Solution: A specialized wood adapter bracket system was engineered to allow secure attachment of custom wooden railing assemblies to the modular dock framework. This provided the desired visual and tactile finish while maintaining the structural integrity and flexibility of the underlying modular system.
PROJECT GOALS
SAFE & ACCESSIBLE
We aimed to design stable, ADA-compliant walkways that offer safe and easy access to Greenwich’s breathtaking trails, ensuring a secure and enjoyable experience for all visitors.
LOW MAINTENANCE
Our goal was to create a walkway using marine-grade aluminum and reinforced polyethylene to withstand harsh weather and saltwater exposure, providing long-lasting durability with minimal upkeep.
ECO-FRIENDLY
We sought to carefully integrate a low-impact trail into the landscape, preserving natural habitats while accommodating high visitor traffic and blending sustainability with tourism excellence.
Installation: Precision with Minimal Impact
Installation
The installation of the new modular dock and bridge system at Le Pays de la Sagouine was executed in a series of carefully coordinated phases to ensure precision alignment, stability, and long-term performance in the site’s challenging tidal and environmental conditions.
All dock components were delivered to the site in advance of installation to facilitate efficient staging and minimize crane operation time. Once the crane was mobilized, dock sections were lifted and placed directly into the water, following a pre-defined sequence to ensure accurate positioning relative to the shoreline and existing infrastructure.
After placement, the dock was temporarily anchored to maintain stability during alignment and connection of adjacent sections. Permanent anchoring was then completed using a hybrid system consisting of helical moorings and concrete ballast anchors, designed to provide optimal resistance to both lateral movement and vertical uplift caused by tidal fluctuations and wind loads.
Following stabilization, gangways were installed to connect the new dock platforms and provide seamless pedestrian transitions between fixed and floating elements. Transition plates were then fitted to ensure smooth, accessible connections across varying elevations.
Finally, the on-site technical team constructed and installed the custom wooden railing system, attaching it to the pre-engineered adapter brackets integrated into the dock frame. This final step completed the installation, blending structural functionality with the aesthetic character desired by the client.
Results: Transforming Visitor Experience
Results
The completed installation successfully addressed the structural, environmental, and logistical challenges unique to Le Pays de la Sagouine, providing a reliable, modular, and visually integrated access solution.
The new removable dock and bridge system has demonstrated excellent seasonal performance, with straightforward removal and reinstallation procedures that can be completed efficiently each year. By eliminating winter exposure, the structure avoids ice-related damage and significantly reduces long-term maintenance requirements and lifecycle costs.
The modular breakaway design has proven highly effective for crane handling operations, maintaining safety margins for lifting and minimizing setup time during both seasonal transitions. The sectional approach also simplifies inspection and component replacement, enhancing maintainability and overall system resilience.
The custom railing interface achieved full design intent, allowing the client to incorporate wood railings that complement the site’s architectural and cultural character without compromising structural stability. This adaptability reinforced the project’s success as both a functional infrastructure upgrade and an aesthetically cohesive enhancement to the visitor experience.
Overall, the project delivered a cost-effective, durable, and context-sensitive solution, meeting all safety and performance objectives while preserving accessibility to one of the region’s most important cultural landmarks.
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